MEP Design Verification Report-Report No. 1-Underground Services-Final- Rev 1

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Information Technology and Communications

Complex

Saudi Arabia - Riyadh

MEP Design Verification Report

Underground Services Final Report

Report No. 1

Prepared for

Drake & Scull International

January 14th

, 2012

Rev 1


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Quality Control Sheet

Project ITCC- 18 ParcelsLocation Riyadh, KSAClient Drake & Scull International

Att. Mr. Saher Kamal, Project Director

Prepared by Jain Consultants International

Contact person Ammar Nahya , CEO

Amman/ 7th Circle beside Royal Jordanian H.Q.

P.O. Box 143833

Amman 11814

Jordan

Tel: +962-6-5857690

Fax: +962-6-5857035

Email:[email protected]

Submitted to Drake & Scull International

PO Box 15130

Riyadh 11444

Kingdom of Saudi Arabia

Tel: +966 1 464 3037

Fax: +966 1 464 3375Contact person Mr. Saher Kamal, Project Director

Document Register:

Item Revision No. Date Description

DVR251011 1 January 14th , 2012MEP Design verification report

# 1

Quality Control Log:

Item Originator Reviewer Authorized By

DVR251011 SIM, IMH AMH, IMH ASN
mailto:[email protected]:[email protected]:[email protected]:[email protected]


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Table of Contents


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TABLE OF CONTENTS

I. PROJECT INFORMATION ..................................................................................... 5II.

EXECUTIVE SUMMARY ........................................................................................ 5A. INTRODUCTION ............................................................................................... 5B. METHODOLOGY ............................................................................................... 6C. SUMMARY OF FINDING S ............................................................................... 6

1. MECHANICAL ............................................................................................. 72. ELECTRICAL .............................................................................................. 8

III. RECOMMENDATIONS ........................................................................................... 9A. MECHANICAL ................................................................................................... 9B. ELECTRICAL ..................................................................................................... 9

IV. DETAILED ANALYSIS ............................................................................................ 57A. MECHANICAL ................................................................................................... 57

1. PUBLIC HEALTH......................................................................................... 572. HVAC .............................................................................................................. 1733. FIRE FIGHTING ........................................................................................... 173

B. ELECTRICAL ..................................................................................................... 1741. GROUNDING & LIGHTNING PROTECTION ........................................ 1742. NORMAL & EMERGENCY LIGHTING .................................................. 2023. POWER & LOW VOLTAGE DISTIBUTION ........................................... 2024. IT NETWORK ............................................................................................... 2025. FIRE ALARM & DETECTION ................................................................... 202

V. REFERENCE STANDARDS .................................................................................... 203VI. APPENDICES ..................................................................................................... 205


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I. PROJECT INFORMATIONThe project is located in the northern part of Riyadh at the intersection of Imam Saud

Street and Takhasusi Street.

The project consists of 13 buildings with a total built up area of 431,304 m2 divided into

several building types of commercial and retail.The MEP design was done by Zuhair Fayez Partnership Consultants and the MEP

contract was awarded to Drake & Scull International DSI. As a part of their contractual

agreement, DSI is required to verify the MEP design for:

1- Validity2- Constructability3- Functionality

DSI has signed a contract with Jain Engineering Consultants International to verify the

MEP design and issue their results in stages to coincide with construction activities. Since

the main contractor is near casting the lowest basement slab, it is important for DSI to

verify design of services below that slab (Drainage, sump pits, groundingetc) and

produce related shop drawings first.

II. EXECUTIVE SUMMARYA. Introduction

The purpose of this report is to provide information regarding the design validation of

the MEP systems for the Information Technology and Communications Complex(ITCC)- 18 Parcels Project in Riyadh, KSA. The design review was conducted to

highlight any potential impact caused by the design on the construction activities of

the project. The point of view expressed in this report is that of the author which is

based on International Practices and Standards. It is no meant to be condemnatory or

judgmental of the current design. The intention of this report is to highlight issues

related to the progress of engineering works such as production of shop drawings and

materials ordering. The design review was conducted on sample areas of the project

for each discipline of the MEP systems as per the scope of work. This spot check is

an indication of the general condition of the design and must not be taken as a

complete list of design issues that might impact construction activities. The designreviewer reserves the right to highlight more issue should they arise in the future.

The information presented in this report is based on the Issued for Construction (IFC)

drawings, specifications and relevant calculations issued for the project.

It must be noted that the review was done without altering any design parameters

used by the original designer.

The following is a summary of the design review for the underground MEP systems

for all buildings. Supporting documents and more information may be found in

subsequent sections (Underground services for this report means: All services


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running below the lowest slab in a building and do not include analysis of

underground services running outside the building):

B. MethodologyA comprehensive review of IFC documents (MEP drawings, specifications andcalculations) was carried out using the best up-to-date quality assurance procedures to

identify best practice that should be used and current problems in the design that

should be avoided. The verification also considers the requirements for installation,

commissioning, operation and control and subsequent maintenance of systems

selected at the design stage.

The design verification process provides information on required design inputs,

outputs and practical key design watch-points for MEP building services topics which

will lead to improvements in the subsequent implementation of the design, and

reduce the risk of problems occurring during installation, commissioning or systemoperation. This was expressed as a summary tables as shown in further pages. These

tables are then followed by detailed analysis for the drawings or specifications. The

analysis will include minor and major comments, inconsistency and contradiction

between drawings and/or drawings against specifications, lack of coordination with

other trades and ended by recommendations.

C. Summary of FindingsTables (M.1-M.13 & E.1-E.13) provide a summary of the following:

1. Availability of design documents: The review included checking for completenessof design documents such as drawings, specifications, calculations, detailsetc

2. Consistency between design documents within the same discipline: The reviewincluded examination of level of consistency between design documents prior to

checking against sample outputs

3. Coordination between design documents of an MEP discipline and otherdisciplines: The review included examination of coordination level between

various disciplines such as between drainage and structural or grounding and

structural

4. Compliance of design with International Standards and project requirementslisted in the specifications: The review included examination of compliance level

of the design with projects standards

The following observations were noted for the systems reviewed namely

UndergroundServices:

1. Some data are available for some buildings but not others, such as detailsdrawings; we have assumed such data are typical to all buildings.

2. Some buildings designs were compliant with specifications requirements butothers were not

3. Some designs that comply with specifications requirements were not compliantwith International Standards listed in the same specifications


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4. Many of the designs did not comply with sample calculations outputs.The following is a summary of review result for Mechanical and Electrical

disciplines:

1. Mechanical:a. HVAC (Not included in this report)b. Water (Only for underground services)

The design does not contain any water tanks or pipes that shall impact

underground services

c. Waste and Soil Drainage (Only for underground services)The following is a summary of findings in regards to above system. More

details, calculations and references may be found in subsequent sections:

i. In general, it appears that gravity pipe sizes are adequate and in somecases oversized which is acceptable

ii. In many cases, the forced flow discharge pipes are undersized (Up to1000 Pa/m)

iii. There are many discrepancies in regards to sump pit sizes and depthsbetween MEP floor plans, calculations and structural plans and sections

iv.

Many sump pit sizes were underestimated. Detailed calculations weredone and sizes on design drawings were found to be less than required

either due to deep pipe falls, pump physical size or flow

v. Sump pump calculations in many buildings were based on incorrectparameters. Such parameters include incorrect fixture units, rainfall

intensities, areasetc

vi. Slopes of many pipes are not as per standards (UPC or IPC)vii. In many cases where pipes are running in a raft slab, the long pipe run

final elevation is close to raft bottom. This is an issue that a structural

engineer must review and provide an opinion. Also, this shall impact pit

depths

viii. Pipe connection between elevator drain to sump pit is not considering thelow level of elevator drain connection. Also, flow from fire fighters

elevator drain is not considered in pump sizing

ix. There are no sand traps at the entry of sump pitsx. There are no information (size, capacity, calculationsetc) provided for

grease trap in WH06. Location of grease trap is close to populated areas

which is going to cause bad odors to transfer to restaurant and other

areas. Also, the grease trap is not shown on structural drawings

xi. There is no service connection to grey water tank in WH06 shown onplans or riser diagrams. All drainage from above floors is directly

connected to waste water network outside the building without any

recycling. Note that the design includes a set of calculations for this tank.


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In other buildings waste pipes are not connected to either external

network or grey water tanks

xii. There are many discrepancies in regards to grey water tank size betweencalculations, plans and structural drawings (In KB01, calculated size was

102 m3 and on MEP plans is shown as 216 m3)

xiii. All grey water tanks are oversized. In general, this is acceptable for othertypes of tanks. However, in a grey water system it is dangerous to store

untreated water more than 72 hours (IPC). It was found that tanks were

sized to store grey water for an average of 6-7 days

xiv. Most of grey water tanks are not provided with vent, make up water, overflow or drain connections

xv. In IT01, the plumbing drawings indicate grey water tank below ground.However, the same tank is shown on structural drawings above ground

d. Storm Water Drainage (Only for underground services)The following is a summary of findings in regards to above system. More


i. Rainfall intensity values and area calculations were found to be incorrectand inconsistent between buildings

e. Fire Fighting (Not included in this report)2. Electrical:

a. Grounding & Lightning Protection (For the complete system in all buildings)The following is a summary of findings in regards to above system. More


i. Calculations for grounding and lightning systems were not provided withIFC documents

ii. In general, lightning system designed overall resistance is withinstandard required values

iii. Grounding conductor for main electrical equipment is over sized (Whichis acceptable) in some buildings while in many other buildings it is

undersized

iv. Telecommunication clean grounding is not provided in many buildings.This means that number of grounding pits must be increased

v. Calculated Telecommunication grounding resistance (where provided)exceeds specification requirements. This means that number of

grounding pits and/ or rods is underestimated

vi. General grounding for RMUs, transformers, generators, LV switchgearsis not provided for many buildings

vii. Calculated grounding resistance for RMUs, transformers, generators, LVswitchgears (where provided) exceeds specification requirements


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viii. Available earth pits do not reflect the actual number of pits required fortelecommunication, general and lightning grounding system

ix. There are inconsistency within system installation details provided onIFC design drawings

x. Grounding rods within raft slabs (With a thickness of 0.7-1.3 meters) areshown to be 3.0 deep (Starting at 0.3 m below FFL). However, thestandard calls for 3.0 m of rod length to be extended vertically into earth.

Also, main ring electrode is shown on drawings to be installed 0.3 meters

below FFL of raft. This means the ring electrode is going to be buried

within raft. However, the specifications call for it to be 0.6 m below

grade and the NFPA 780 calls for it to be in direct contact with earth at a

depth of not less than 0.46 m.

xi. There are inconsistency between specifications and drawings in regardsto rod sizes, burial depth of ring electrode, embedded conduit sizesetc

b. Normal & Emergency Lighting (Not included in this report)c. Power & Low Voltage Distribution(Not included in this report)d. Fire Alarm & Detection (Not included in this report)e. IT Network (Not included in this report)

III. RECOMMENDATIONSIt is of the design reviewer opinion that underground services design requires revisions to bemade prior to proceeding with production of shop drawings or site installations as follows:

A. Mechanical:1. Water System: No design revisions are required in relation to this system for

underground services2. Waste and Soil Drainage System: In general pipe network design requires minor

revisions. However, sump pits, pumps, grey water system and rain water systemrequire major revision. Calculations must be re-done and results must becoordinated with other disciplines such as structural, electrical power,architecturaletc

B. Electrical:1. Lighting and Grounding System: Calculations must be redone based on actual

soil resistivity measurements done on site. Also, number of grounding pits, sizeand depth of rods, number of down conductors and general layout of system mustbe revised prior to producing shop drawings or start of installation on site


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Plumbing Drainage System

Building KB 01-02

Verification Checklist Summary

Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable

Final design report Not providedOwner/Operator requirement

Not provided

Check Foundation Type

Column BaseCheck Drainage PipeEncasement

Check Sump Pit FlowCalculations

Check Sump Pit HeadCalculations

Check Coordination BetweenSump Pit & Structural

Drawings

Check Gray Water TankCalculations

Check Non-Potable Water

Tank Calculations

Check Consistency BetweenDrainage Plans, Riser

Diagram & Calculations

Check Coordination BetweenGray Water System &

Structual Drawings

Table M.1


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Building KB 03


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


RaftCheck Drainage Pipe

Encasement




Drawings


Check Non-Potable WaterTank Calculations




Structual Drawings

Table M.2


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Building RD 03


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided

Check Foundation Type Column BaseCheck Drainage Pipe

Encasement


Check Sump Pit Head

Calculations

Data is not Available, refer todetailed Analysis


Drawings

Check Gray Water TankCalculations Data is not Available, refer todetailed AnalysisCheck Non-Potable Water

Tank Calculations




Check Coordination Between

Gray Water System &Structual Drawings

Table M.3


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Building RD 04


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


Column BaseCheck Drainage Pipe

Encasement


Check Sump Pit Head

Calculations



Drawings

Check Gray Water Tank

Calculations Check Non-Potable Water

Tank Calculations





Structual Drawings

Table M.4


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Building WH 01-04


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


Raft FoundationCheck Drainage Pipe

Encasement




Drawings






Structual Drawings

Table M.5


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Building WH 05


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided

Check Foundation Type Raft FoundationCheck Drainage Pipe

Encasement




Drawings

Check Gray Water Tank

Calculations





Structual Drawings

Table M.6


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Building WH 06


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


RaftCheck Drainage Pipe

Encasement




Drawings






Structual Drawings

Table M.7


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Building IT 01


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


Encasement




Drawings






Structual Drawings

Table M.8


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Building IT02


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


Encasement


Check Sump Pit Head

Calculations

Check Coordination Between

Sump Pit & StructuralDrawings

Check Gray Water TankCalculations Data is not Available, refer todetailed AnalysisCheck Non-Potable Water

Tank Calculations





Structual Drawings

Table M.9


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Building IT 03


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


Column BaseCheck Drainage Pipe

Encasement




Drawings



Data is not Available, refer todetailed AnalysisCheck Consistency Between

Drainage Plans, RiserDiagram & Calculations


Structual Drawings

Table M.10


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Building KB 04


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


Encasement




Drawings



Table M.11


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Building KB 05


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


Encasement




Drawings



Table M.12


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Building KB 06


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable

Final design report Not provided

Owner/Operator requirement

Not providedCheck Foundation Type

Column Base

Check Drainage PipeEncasement




Drawings



Table M.13


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Grounding & Lightning Protection

Building KB 01-02


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided

Soil resistivity measurement Data not provided, refer todetailed analysis for

assumptions

Check type of earthingsystem to be employed (such

as TNS or TN-C-S)

Check local electricalcompany requirements and

electrical supplyarrangements

Check connections to othersystems and determine any

clean earth requirement

Refer to detailed analysis

Check earthing systemcalculations Data not provided, refer todetailed analysis andcalculations

Check schematic of mainearth bar and connections Data not provided

Check earth termination andspace required

Check electrical bondingdetails and provisions for

other systems such asceilings, catering equipment

and raised floors

Covered in the specificationsonly

Check relevant specificationclauses Refer to detailed analysis

Size of mainearthing/equipotentialbonding conductors

Refer to detailed analysis andcalculations

Check consistency betweenelectrical drawings Refer to detailed analysis

Check consistency betweenspecifications and drawings Refer to detailed analysis


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Building KB 01-02


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable

Checking arrangement andlocation of earth pits (such as

coordination with othertrades (structural,Architectural and

mechanical))

Check the use of transientearth clamps for clamping

different earthing systems toprevent transient

disturbances

Refer to detailed analysisProvide main equipotential

bonding (required forlightning protection,

structure, incoming services,heating and ventilation).

Refer to detailed analysisProvide supplementarybonding conductors to

exposed and extraneousmetal work such as trunkingtrays, ceiling grid and raised

access floors

Covered in the specificationsonlyCheck that removable links

for testing are specified. Covered in the details onlyCheck that test link locationis coordinated with Architect Refer to detailed analysisCheck for provision of

protective earth and clean

earth bars at eachswitchroom and riserlocation

Refer to detailed analysisConsider whether dedicated

earths are necessary (forexample telecommunications

and electronic systems)

Refer to detailed analysisCheck air terminals are

considered with correct sizeand location

Check roof strike terminationnetwork is considered with

correct conductor size andlocation


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Building KB 01-02


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable

Check down coductors areconsidered with correct

conductor size and spacing


Table E.1


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Building KB-03


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided

Soil resistivity measurement

Data not provided, refer todetailed analysis forassumptions

Check type of earthing systemto be employed (such as TNS

or TN-C-S)


electrical supply arrangements




Check earthing systemcalculations Data not provided, refer to

detailed analysis andcalculations

Check schematic of main earthbar and connections

Data not provided


Check electrical bonding

details and provisions for othersystems such as ceilings,

catering equipment and raisedfloors


Check relevant specificationclauses

Refer to detailed analysisSize of main

earthing/equipotential bondingconductors


Check consistency betweenelectrical drawings

Refer to detailed analysisCheck consistency betweenspecifications and drawings



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Building KB-03


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable

Checking arrangement andlocation of earth pits (such ascoordination with other trades(structural, Architectural and

mechanical))



different earthing systems toprevent transient disturbances


bonding (required for lightningprotection,



Provide supplementarybonding conductors to exposed

and extraneous metal worksuch as trunking trays, ceilinggrid and raised access floors


Check that removable links fortesting are specified.

Covered in the details onlyCheck that test link location is

coordinated with Architect


Check for provision ofprotective earth and clean earth

bars at each switchroom andriser location


Consider whether dedicatedearths are necessary (for

example telecommunicationsand electronic systems)



Check roof strike terminationnetwork is considered withcorrect conductor size and

location

Check down coductors are

considered with correctconductor size and spacing


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Building KB-03


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable

Table E.2


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Building RD-03


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


assumptions

Check type of earthingsystem to be employed (such

as TNS or TN-C-S)


electrical supplyarrangements



Refer to detailed analysisCheck earthing system

calculations

Data not provided, refer todetailed analysis and

calculations

Check schematic of mainearth bar and connections

Data not provided



other systems such asceilings, catering equipment

and raised floors

Covered in the specifications

only



earthing/equipotentialbonding conductors

Refer to detailed analysis and

calculations




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Building RD-03


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable

Check consistency betweenspecifications and drawings

Refer to detailed analysisChecking arrangement and

location of earth pits (such as

coordination with othertrades (structural,Architectural and

mechanical))



different earthing systems toprevent transient

disturbances


Provide main equipotentialbonding (required forlightning protection,



Provide supplementarybonding conductors to

exposed and extraneousmetal work such as trunkingtrays, ceiling grid and raised

access floors


Check that removable linksfor testing are specified.

Covered in the details onlyCheck that test link location

is coordinated with Architect


Check for provision ofprotective earth and clean

earth bars at eachswitchroom and riser

location





Check air terminals are

considered with correct sizeand location Refer to detailed analysis


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Building RD-03


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


location




Table E.3


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Building RD-04


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


assumptionsCheck type of earthing systemto be employed (such as TNS

or TN-C-S)






Check earthing systemcalculations


calculations

Check schematic of mainearth bar and connections

Data not provided



other systems such as ceilings,catering equipment and raised

floors

Covered in the specificationsonlyCheck relevant specification

clauses Refer to detailed analysis

Size of mainearthing/equipotentialbonding conductors


and calculations





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Building RD-04


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


mechanical))





bonding (required forlightning protection,



Provide supplementarybonding conductors to

exposed and extraneous metalwork such as trunking trays,ceiling grid and raised access

floors


Check that removable linksfor testing are specified.


coordinated with Architect


Check for provision ofprotective earth and clean

earth bars at each switchroomand riser location





Check air terminals areconsidered with correct size

and location


Check roof strike terminationnetwork is considered with

correct conductor size andlocation


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Building RD-04


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable




Table E.4


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Building WH 01-04


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided



or TN-C-S)




clean earth requirement Refer to detailed analysis




Data not provided


Check electrical bondingdetails and provisions for other

systems such as ceilings,catering equipment and raised

floors

Covered in the specificationsonlyCheck relevant specification

clauses Refer to detailed analysis

Size of mainearthing/equipotential bonding

conductors

Refer to detailed analysis andcalculationsCheck consistency between

electrical drawings Refer to detailed analysis




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Building WH 01-04


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


mechanical))











Check that removable links fortesting are specified. Covered in the details only

Check that test link location iscoordinated with Architect Refer to detailed analysis


bars at each switchroom and

riser location








location


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Building WH 01-04


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable



Table E.5


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Building WH-05


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided



or TN-C-S)








Data not provided






Check relevant specificationclauses Refer to detailed analysisSize of main






location of earth pits (such ascoordination with other trades(structural, Architectural and

mechanical))



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Building WH-05


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable




Provide main equipotentialbonding (required for lightningprotection,





Check that removable links for

testing are specified.

Covered in the details only









and location



location



Table E.6


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Building WH-06


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


assumptions


or TN-C-S)







calculations


Data not provided





Covered in the specifications

only




Check consistency between


Check consistency between

specifications and drawings



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Building WH-06


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


mechanical))





Provide main equipotentialbonding (required for lightning

protection,structure, incoming services,

heating and ventilation).

Provide supplementary

bonding conductors to exposedand extraneous metal work

such as trunking trays, ceilinggrid and raised access floors













location


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Building WH-06


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable



Table E.7


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Building IT-01


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided


Data not provided, refer to

detailed analysis forassumptions


or TN-C-S)









Data not provided




floors


Check relevant specificationclauses Refer to detailed analysisSize of main



electrical drawings Refer to detailed analysisCheck consistency betweenspecifications and drawings Refer to detailed analysisChecking arrangement and

location of earth pits (such ascoordination with other trades

(structural, Architectural andmechanical))



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Building IT-01


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable



















and location


location




Table E.8


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Building IT-02


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not providedSoil resistivity measurement

Data not provided, refer todetailed analysis for

assumptions


or TN-C-S)








calculations


Data not provided



systems such as ceilings,





conductors Refer to detailed analysis andcalculations





46/292

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Building IT-02


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


mechanical))





bonding (required for lightningprotection, structure, incoming

services, heating andventilation).


Provide supplementary

bonding conductors to exposedand extraneous metal work

such as trunking trays, ceilinggrid and raised access floors




Check for provision of

protective earth and clean earthbars at each switchroom and

riser location






and location


47/292

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Building IT-02


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


location




Table E.9


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Building IT-03


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided



or TN-C-S)








calculations


Data not provided














coordination with other trades(structural, Architectural and



49/292

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Building IT-03


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable

mechanical))










Check that removable links for

testing are specified.


coordinated with Architect Refer to detailed analysisCheck for provision of


riser location






and location


location



Table E.10


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Building KB-04


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided



assumptions


or TN-C-S)








calculations


Data not provided










electrical drawings Refer to detailed analysisCheck consistency betweenspecifications and drawings Refer to detailed analysisChecking arrangement and


coordination with other trades(structural, Architectural and



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Building KB-04


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable

mechanical))









Covered in the specificationsonlyCheck that removable links for

testing are specified. Covered in the details onlyCheck that test link location is



riser location

Consider whether dedicated



Check air terminals are



location




Table E.11


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Building KB-05


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


Not provided



or TN-C-S)








calculationsCheck schematic of main earth

bar and connections

Data not provided




floors




conductors Refer to detailed analysis andcalculations

Check consistency betweenelectrical drawings Refer to detailed analysis

Check consistency betweenspecifications and drawings Refer to detailed analysisChecking arrangement and

location of earth pits (such ascoordination with other trades Refer to detailed analysis


53/292

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Building KB-05


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable

(structural, Architectural andmechanical))


different earthing systems to

prevent transient disturbances








Check that removable links fortesting are specified. Covered in the details onlyCheck that test link location is



riser location






and location


location

Refer to detailed analysisCheck down coductors are


Table E.12


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Building KB-06


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable

Final design report Not providedOwner/Operator requirement Not providedSoil resistivity measurement



or TN-C-S)








calculations


Data not provided












55/292

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Building KB-06


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable




coordination with other trades(structural, Architectural andmechanical))














Check for provision ofprotective earth and clean earthbars at each switchroom and

riser location






and location


56/292

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Building KB-06


Key Design Checks

Checked Compliance

Notes & Remarks

Yes

No

Not

Applicable

Yes

No

Partially

Not

Applicable


location



Table E.13


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IV. DETAILED ANALYSISA. MECHANICAL

1. Public healthBelow is the detailed analysis related to plumbing drainage system considering the

methodology specified above:

a. BUILDING.(KB01&02)Underground piping, submersible pumps and pits, gray water concrete tank and

related calculations have been reviewed.

I. DESIGN PARAMETERS:The followings table shows the design parameters used in the IFC design documents and

those extracted through the design review process

Table M.14 : Design parameters

ItemIFC Design Required Parameters

Value Reference Value Reference

Parking drain Fixtures Units 21 UPC 8 UPC2

AHU & FCU Fixtures Units 2 UPC 2 UPC3

Floor Drain Fixtures Units 2 UPC 2 UPC3

Slope of Drainage piping

(100 & 150 mm Diameters)Not

Indicated- 1% IPC4

Rainfall intensity 758 mm/hr UPC 50 mm/hr UPC5

WC Flush flow rateNot

Indicated-

6.1 liter(1.6

gallon/flush)UPC6

Number of persons per m2Not

Indicated- 14

Plumbing EngineeringServicing Design

Guide- The Institute ofPlumbing 20027

Water consumption ratio per

shower

NotIndicated

-5%

Water consumption ratio pertoilet flushing

NotIndicated

- 32%


Laundry

NotIndicated

-20%


kitchen

NotIndicated

-15%


basin

NotIndicated

-9%

1. IFC design indicates parking floor drain to have 2 FU. However, since pipe connection is 4 UPCcalls for 8 FU to be used in calculations.

2. Refer to Appendix A, PageA.33. Refer to Appendix A, PageA.24. Refer to appendix A, Page A.11


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Table M.14 : Design parameters

ItemIFC Design Required Parameters

Value Reference Value Reference5. Refer to Appendix A, Page A.56. Refer to Appendix A, Page A.17. Refer to Appendix A, Page A.48. Rainfall intensity used by the designer varies for different buildings. It is recommended to use 50

mm/hr

II. SUMP PITS & SUBMERSIBLE PUMPS (DSP-1):1. Submersible pump-1 (DSP-1) has been reviewed as an example for others in

the same building. Results of this review indicate that same issues are found

in other areas within the same building

2. IFC Design plans(Drainage), IFC calculations, IFC risers, IFC structuraldrawings and sections have been reviewed, the following table shows the

results:

Table M.15 ; DSP-1 Design data as per IFC Design Drawings & Calculations Output from design

review

IFC Mechanical Drawings IFC Calculations IFC Structural DrawingsDesign Review

Output

Plan Riser Plan Sections

Drawingsreference

3

rd

BasementMaster FloorPlumbing

Plan(P-101)

GroundFloor Master

PlumbingPlan

(P-116)

SanitarySewerSystemRiser

Diagram (P-401)

CalculationsJ09-07800

MasterFound-

Ation Plan(S101)

Sections &Details

( S-201)N/A

FoundationType Column Base (Footing)

Location3rd BasementGrids (A&5)

N/A -

3rdBasement

Grids(A&5)

- N/A

Encasementfor DrainagePipe Under

ground

Not shown - - Shown ShownShould be indicated

on Plumbingdrawings

Pump Data

2 pumpsFlow = 2.6

L/s each

Head = 1.2Bar

Notprovided

Not available - -

2 pumps, flow = 2.2L/s each

Head = 2.0 Bar

IFC Pumpsaccepted


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Table M.15 ; DSP-1 Design data as per IFC Design Drawings & Calculations Output from design

review

IFC Mechanical Drawings IFC Calculations IFC Structural DrawingsDesign Review

Output


Pit Size1.0 x 1.0x1.6

m3Not

providedNot available

1.0 m x 1.0m

Depth isnot

available

1.8 x 1.8 x2.4 m3

1.3 x 1.3 x 2.0 m3

Pumpdischargepipe size(ForcedFlow)

100 mmNot

providedNot provided 100 mm

Sump pit Service

Mechanical Drawings Calculations StructuralDesign Review

Output


Parkingdrains Included Included Not Included N/A N/A

Should be indicatedon riser diagram

and considered incalculations

Elevator PitNot Included

NotIncluded

Not Included N/A N/AShould be includedin plans, riser and

calculations

Condensatedrain Not Included

NotIncluded

Not Included N/A N/AShould be shownon plans, riser and

calculationsRed: Not Acceptable, Orange: Partially, Green: Acceptable

3. Description of above findings:a. Pump Flow rate:

i. In the same discipline there is discrepancy in the Tag numbersbetween risers, calculations and plans. Same mismatching found with

other disciplines like structural

ii. It is required to drain the elevator pit with a separate pump set or witha floor drain connected to sump pit.

iii. Flow of condensate drain from FCUs & AHUs is not considered indesign calculations and not shown on plans or risers

4. Pump Head:Calculations are not included in IFC design for pump head

5. Pit Size:a. Modified calculations based on the above will change pit sizeb. Duplex Pump sizes are not taken into considerationc. Effective volume is not properly calculatedd. Pit depth is less than required (Waste pipe invert level connected to

sump pit is not taken into consideration)

e. Elevator pit is not taken into consideration in sizing the pit depth


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f. No sand trap is provided at waste pipe connected to sump pit6. Sample calculations:-Below is a sample calculation for DSP-1

a. Flow Rate calculations:Consists of all waste water connected into sump pit-1 including:

i. Parking drainsii. Condensate drains

iii. Floor drainsThe following table shows flow of connected fixtures to DSP-1 done by design reviewer

(IFC Design does not contain similar calculations):

Table M.16 : Connected Fixtures to DSP-1

D.F.U.VNumberFixture

TotalUnit

264810Parking Drains

1226AHU & FCU1226Floor Drain

104--Total Fixtures units70 GPM(4.4 L/s)

--Total Fixtures Flow Rate*

75%Diversity (All systems shall not work together in any case)

52.5 GPM

(3.3 L/s)

Total Flow

Reference for converting D.F.U.V to flow rate is NBS Monograph, Fig 3-3 NBS Monograph 31, Design-flow curves for plumbing-drainage systems. Refer to Appendix A, Page A.15

b. Pump head calculations done by design reviewer (IFC design does notcontain similar calculations):

The below table shows pump head calculations for DSP-1

Table M.17 : Pump Head Calculations

StaticHead

Documents

MEP Design Verification Report-Report No. 1-Underground Services-Final- Rev 1