Supervision Check List

8/19/2019 Supervision Check List

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Supervision and quality control check list ______________________________________

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INTRODUCITON

This checklist for site supervisors is issued in order to ensure a uniformsystem of supervision of building construction projects constructed inthe region of those projects budgeted by the government.As a result to ensure the quality of construction, this checklist used as

guidelines for the supervisors and shows level of responsibilities,liabilities and limitations of the supervisor are briey mentioned in thesteps to the general terms.

Details of construction may specify in the drawings, technicalspecications and in the general and special conditions of the contract.

The duty of the site !ngineers"#upervisors is to ensure that theconstruction works are e$ecuted in accordance with the contractrequirement.

Therefore, in the application of this checklist the details specied in thecontract document always precede before the application and use of it.

There are also tables and forms in this checklist that help as records of the incidences a%ecting the work and as references. &n addition thestandard technical specication is used as reference on the preparationof this checklist and shall always have precedence over the checklist.


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Supervision and quality control check list .

1. PREPARATIONS AND SITE INVESTIGATION

Check::-

-.- The site visually if underground utilities cross it.

-. The site on maps showing the location of underground structuresand utilities to avoid breaking them during construction.

-./ The site plan and layout of buildings and sewer system especiallyconcerning levels and soil condition. &f changes are necessarysubmit a written report to the designer.

-.0 The area to be cleared o% and take measurements.

-.1 The trees and bushes within the foundation to be cut and rootedup as given in the standard technical specication.

-.2 3ermission is obtained from local authorities to cut down treesoutside the foundation areas.

-.4 *oarder lines are agreed with local municipality and cornerstones placed.

-.5 The connection points for water and electricity are agreed uponwith +#A and !!36' local authorities.


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./ The elevation reference point in accordance with the survey mapand conrm

.0 All bottom of trenches and oor levels are according to theelevations shown on the drawings.

3. EXCAVATION & EARTHWORK

Check: -

/.- 6heck all topsoil is e$cavated separately.

/. Decide the place to pile up the suitable e$cavated material andcheck it is meters outside the building perimeter.

/./ Decide the place for the cart away that is not necessary for backlling or terracing.

/.0 8or sites where blasting is proposed, the e$plosives are used thequantities and manner recommended by the manufacturers.6heck a written consent obtained on each occasion thecontractor wished to use e$plosives.

/.1 All e$cavations are carried out to the lines, levels, widths anddepths shown on the drawings.


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/.-- &n locations where the soil is subject to softening duringe$cavation of a bottom layer of soil is removed immediately

before the placing of concrete, in accordance with the standardtechnical specication.

4. FOUNDATION TRENCH AND PIT EXCAVATION

Check: -

0.- The foundation drawings to correspond with the conditions on thesite. &f not prepare a written report and submit to the designerimmediately.

0. The foundation depth, width, line and levels to correspond to thedrawings.

0./ The e$cavation or foundation is e$ecuted 1cm wider on eachside than the thickness of the foundation wall as given in thestandard technical specication.

0.0 The trench and pits to be clean from grass, bushes and pieces of wood.

0.1 The trench and pits to be kept free of water by pumping or othermeans

0.2 The foundation engineer has accepted the e$cavated foundation


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1. The stone is of the type given on specications

1./ The stone to be hard, sound, free from cracks and decay ;and not<weathered.

1.0 The stone is freshly quarried from an approved quarry.

1.1 The stone not to be round surfaced.

1.2 The stone masonry e$ecution is with specied mortar and withwell=lled joints.

1.4 The stone masonry during e$ecution is kept free from solid andother kind of dirt.

1.5 The length of stone does not e$ceed three times its height

1.7 The mi$ of lean concrete to correspond the specication

1.-9The mi$ proportion of mortar is correct.

6. BACK FILLING

Check: -2.- All internal back lling is done with approved material if possible

with material e$cavated on the site


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2.2 All backlling to be in layers and compacted to 71> of ma$imum

dry density in accordance with the standard technicalspecication.2.4 !ach layer to be well rammed and consolidated with the addition

of water as necessary to achieve the required compaction.

2.5 The ma$imum layer of ll for one time compaction does note$ceed -1cm the specied thickness in the standard technicalspecication depending on the method of compaction.

2.7 Depression or voids that are created during trimming of slopes toembankments, cutting shoulders, ditches etc., are lled withsuitable material and to approved compaction.

2.-9Any material which after repeated compaction does not fulll therequirements is removed and replaced.

7. DISPOSAL OF EXCAVATED MATERIAL

Check: -

#urplus e$cavated material is removed from the site to the dumping

ground as specied in contract agreement.


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9. CONCRETE

Check: -

7.- All ingredients cement, aggregates and water are of the type andquality specied.

7. 6ement is fresh, not older than si$ months and is delivered to thesite in the manufacturer@s original sealed bags.

7./ 6ement is stored in a dry and well=ventilated store, on a woodenoor raised minimum 9cm. above the ground.

7.0 6ement is stocked separately.

7.1 The cement has markings showing the type and dates of consignment pinned to it and check it is used in the order of itsarrival.

7.2 6ement more than si$ months old after production is tested tosatisfy the specied requirements.

7.4 #and or ne aggregate to be clean river or pits sand of approvedquality and consist of hard, dense, durable uncoated rock


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7.-6oarse aggregate to be free from impurities like clay, soft thinelongated or laminated pieces to be free from alkali and organic

matter.

7.-/)radation of ;coarse aggregate< to comply with the standardtechnical specication.

7.-0uality is approved at the quarry before it is delivered to the site.

7.-1 Are stored on clear hard surface to prevent contamination by soilB etc.

7.-2 Di%erent grades are stocked independently.

Check Water: -

7.-4 sed for mi$ing concrete is clean and free from injuriousamounts of soil, acids, alkalis, and organic materials.

7.-5&s not taken from sea or tidal rivers to be used for structuralconcrete. &f possible water shall be piped or otherwise stored inan enclosed container free from contamination.

7.-7 &f there are any doubts about the water a sample shall be takenfor testing.


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7.0Ei$er, which has been cut of use for more than 9 minutes, isthoroughly washed before any fresh concrete is mi$ed as

specied in the standard technical specication.

7.1The mi$er drum is tight to avoid loss of mortar. The valves mustnot leak mi$ing water.

7.2The specied mi$ing time is carefully adhere to but in no caseshall the mi$ing discontinue for less than minutes after addingwater as specied in the standard technical specications.

7.4The batch capacity. The contractor must not be allowed to e$ceedthe rated capacity of the mi$er.

7.5 The materials enter the drum rapidly.

7.7 The whole of the mi$ed batch is removed before materials forfresh batch enter the mi$er.

7./9 Ei$ed concrete is not modied by the addition of e$tra water andcement, in order to facilitate handling of any other purpose.

7./- *efore any casting starts at the site, test cubes of side dimension-1$-1$-1 or cylinders of diameter -1cm and length /9cm of

wood or steel are made ready.

7./All reinforcement and formwork are properly placed prior to as


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7./2Approved design mi$ is used

7./4*efore any casting starts the consistency of fresh concrete mustbe measured using the slump test, from the same batch for testcubes.

7./56oncrete is so transported as rapidly as practicable and placedsuch that contamination, segregation or loss of constituentmaterials does not occur.

7./7All placing of concrete starts from one end and continue in thesame direction without break.

7.096oncrete is deposited as near as practicable and no concrete isdropped from a height e$ceeding meters as specied on thestandard technical specication.

7.0-+hen chutting is used the inclination of the chutes shall be suchas to allow the concrete to ow without the use of water in e$cessof the specied volume for mi$ and without segregation or loss of the ingredients. Details of any proposed chutting plant must beapproved before the plant is delivered.

7.0The vibration is carefully done, and continues until a densehomogeneous mass is produced and surface is fairly smooth.


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7.05After casting is completed and for 4 days thereafter, that the

concrete is depth damp ;cured< to minimi?e lose of moisture fromthe concrete.

7.07+henever testing of a material is required ll the appropriaterequisition form and for the evaluation of test result ll form :o.

FFFFF and get the approval of consultant or designer when theresult is submitted.

7.19&nspection prior to concretingG =

Check-

• The rigidity of the sca%olding and shuttering

• The leak=tightness of joints between formwork elements

•6onformity of the dimensions of the formwork with the;drawings<

• The cleanliness of the formwork.

• The surface condition of the reinforcement

• The position and si?e of reinforcement

• The rigidity of the reinforcement securing systems, and thequality of the joints between bars.

• 6over to reinforcement is correct.• 6lass of concrete, mi$ design and water cement ratio.


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7.10&f any doubt about the quality of, aggregate, cement,reinforcement, and water arises samples are sent for testing.

%&. PRE-STRESSING CONCRETE

Check: -

-9.- All pre=stressing components are stored in clean dry conditions.

-9. All pre=stressing components are clean and free from loose rustat the time of $ing in position and subsequent concreting.

-9./ All pre=stressing tendons are not welded within the length to betensioned.

-9.0 All pre=stressing tendons ;cables< are not twisted and individualwires or strands are identiable at each member.

-9.1 All ducts and tendons are respectively sealed and protecteduntil the tendon is threaded through and the stressingoperations are commenced.

-9.2 All anchor cones blocks and plates are positioned andmaintained during concreting such that the center line of theduct passes a$ially through the anchorage assembly.

-9.4 All bearing surface of the anchorage@s are clean prior toconcreting and tensioning.


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-9.- &f the pull=in of the tendons at completion of anchoring isgreater than that agreed by the engineer, the lead shall bereleased slowly and tensioning carried out afresh.

-9.-/ #uHcient cubes are taken and specied transfer strength isattained.

-9.-0 The tendons are not cropped or cut prior to / days aftergrouting.

-9.-1 8ull records of all tensioning operations including the measurede$tensions, pressure gauge of land all readings and the amountof pull=in at each anchorage, are kept.

-9.-2 All dusts are thoroughly cleaned by compressed are or methodspecied prior to grouting.

-9.-4 All anchorage is sealed before grouting.

-9.-5 The ducts are completely lled with grout.

-9.-7 The lled ducts are protected to the satisfaction of the engineerthat they are not subjected to shock or vibration for one day.

-9.9 8ull records of grouting including the date each ducts grouted iskept.


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-9.1 3re=stressed members are lifted of supported only at the pointsspecied and handled and placed without impact.

-9.2 *eams are prevented from moving laterally during the placingof the in situ concrete.

-9.4 The engineer informed in advance of the date of commencement of manufacture and the dates when tensioningof tendons, casting of members and transfer of stress will beundertaken for the rst time for each type of beam.

-9.5 All 3re=stressed concrete construction comply the standardtechnical specication.

%%. FORM WORK

Check: -

--.- 8ormwork is so constructed that it can be stripped from thehardened concrete easily without hammering or without suchshock or vibration in order to protect the concrete or reduce labor


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--.1 +ooden form works for une$posed concrete surface, aree$ecuted of sawed boards with sharp edges and of the samethickness.

--.2 +ooden formworks for e$posed concrete surface are generally of tongued and grooved boards of the same thickness and free fromknots, holes, cracks and splits.

--.4 8ormwork lumber shall be kept under shed and in varyingthickness and width and shall be constantly accreted and underweight to prevent it from decay.

--.5 *efore any concreting starts, the formwork has the rightdimensions and is level and straight.

--.7 *efore any concreting starts, all irons are thoroughly cleaned outand free from boles and dirt.

--.-9 The top level of the formwork is at the same level as the top of the nished concrete.

--.-- All formwork is removed without any damage to the concreteduring the striking.

--.- After removal of the form work remedial treatment to surface of the broadened concrete is carried out immediately withoutdelay and period of removal should be in accordance with the


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Check: -

-.- #teel reinforcement is stored in clean condition. &t should bereasonably free from loose rust and other impurities such asgrease oil, or tar and other kind of dirt.

-. All reinforcement bars are of the specied quality and inaccordance with the standard technical specication.

-./ )iven in the design in cases where certicates for ultimatetensile strength yield stress, elongation and cold bend tests arenot issued by the manufacture.

-.0 The dimension, length and shape of the reinforcement bars areaccording to the drawings and specications.

-.1 *ending of reinforcement bars is done with adequate bendingtools but heat is strictly not allowed for bending of reinforcementbars.

-.2 All bars with cracks or splits at the bend are not used forconstruction.

-.4 All mild steels have their ends booked, and the bending radiusmeets the specication or drawings.


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-.- And approve the placing of the reinforcement and formworkcondition before any concrete is caste.

-.-/ The reinforcement in structures is not welded unless permittedby the designer.

-.-0 All reinforcement quality and work comply with the standardtechnical specication.

%3. MORTAR

Check: -

-/.- All mortar is if possible mi$ed in an approved mechanical batchmi$er. &f not possible it could be mi$ed by hand until its colorand consistency are uniform

-/. Iime for mortar in freshly burnt limestone. Iime shall bedelivered to the site in large lumps, slaked, run to putty andmature for not less than two weeks before use.

-/./ &f hydraulic lime is used, it is stored in the same manner asdescribed for cement.

-/.0 6ement used in mortar is 3ortland cement and have quality asdescribed for concrete works.


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-/.7 6ement mortar is used within /9 minutes of the duration of cement.

%4. STONE MASONRY WALL

Check: -

-0.- The stone is freshly quarried from an approved quarry.-0. The stone is of type given in specication.

-0./ The stone is hard, sound, free from crack and decay and notweathered.

-0.0 The stone masonry e$ecution is with specied mortar and withwell nished joints.

-0.1 All mortar for stone masonry bedding and jointing is 9mm

thick.

-0.2 #tone masonry during e$ecution is kept free from solid andother kind of dirt.

-0.4 #tonewalling is carried up with no portion more than -999mmabove adjacent wall at any one time.

-0.5 The wall is in plumb within /m.


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-1.- The hollow concrete blocks are free from laminations, cracks andother defects that would impair the proper setting, strength orpermanence of the construction.

-1. The hollow concrete blocks are well=compacted, properly curedand uniform color and te$ture.

-1./ The hollow concrete blocks manufactured on the site have thequality of cement and aggregate as described for concreteworks.

-1.0 All blocks are manufactured in and approved special hollowblock machine and under shed.

-1.1 *efore any manufacturing in big scale starts on the site, testsamples are made, cured and sent for testing and test resultsare approved by the designer.

-1.2 8or curing of hollow blocks, that they are kept moist, at leastfor "seven" ;4< days after casting.

-1.4 That the blocks are properly dried under shade for at least -0days before they are used for construction.

-1.5 Damaged or blocks with defects in the walls are replaced withgood ones at the e$penses of the contractor.


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-1.-0 &f the wall is designated as load bearing by the designer arespecial care is taken for the e$ecution of the work.

-1.-1 A minimum of 2 blocks per -999 pcs. 8or site manufacturedblocks are tested.

-1.-2 The thickness of the joints does not e$ceed -1mm.

-1.-4 The comp mortar is used only above ground level.

-1.-5 The drawings carefully before any wall construction if anyreinforcement or e$pansion joints are prescribed.

-1.-7 The minimum compressive strength class A, 6lass * J 6lass 6hollow concrete blocks is as follows according to the standardtechnical specication.

6lass Average of 2 *locks &ndividual*locks

6lass A 0kg"cm

/5kg"cm

6lass * /1kg"cm

/kg"cm

6lass 6 9kg"cm -5kg"cm


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-2./ *ricks are sacked in water for a minimum period of one daybefore use.

-2.0 #ample panels of not less than -m for each type of brick workincluding joint pointing for painted surface are prepared.

-2.1 All brick works are laid in good !nglish bond even and true toline plumb within /m, level and all joints accurately kept.

-2.2 All points vertical and hori?ontal are well lled with speciedmortar.

-2.4 The thick nesses of the joints do not e$ceed -9mm.

-2.5 All bricks of the same dimensions are only used in the samewall.

-2.7 *rick samples are taken at random from the load approved andalso manufactures test certicate submitted.

-2.-9 All brick walling comply with the standard technicalspecication.

%7. WOODEN WALLS

Check: -


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-4.2 The wall is plumb and level.

%8. PLASTER AND POINTING

Check: -

-5.- The cement plaster and comp plaster quality mi$ture, thicknessand type of surface are According to the specication anddrawing.

-5. That cement plaster is used where water e%ect is e$pected suchas in toilets, laundries and e$ternal walls while comp mortar isused in all cases unless otherwise specied.

-5./ *efore any plaster is applied, the wall is thoroughly cleaned fromdirt and dust.

-5.0 All plaster is mi$ed in a mechanical mi$er of approved type if possible.

-5.1 The wall, depending on the material is kept wet for some timebefore any plaster is applied. &t@s not enough to sprinkle water

just before plastering.

-5.2 All 3ointing if prescribed is done with cement mortar.


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-7.- The shape and si?e of structural steel members comply with therequirements of the specication and the manufacturesstandards.

-7. #i?e location, elevation and plumbing of anchor bolts.

-7./ 6ondition and capacity of welding equipment.

-7.0 6onformity of electrodes to specications and correct usage.

-7.1 3roduction and assembly of steel is carried out in accordancewith the detail drawings and specications.

-7.2 #teel before and after fabrication is straight and free from twistor other damages.

-7.4 6utting is done by shearing, cropping, sawing or machine ame

cutting.

-7.5 6utting by hand operated ame is approved.

-7.7 #heared or cropped edges are dressed to a neat machine workand are prepared for welding nish.

-7.-9 +elded sections are inspected and approved prior to priming.

-7.-- The ma$ gap for butt welded section is less than /mm.


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-7.-4 Coles for $ing electrical ttings, partitions, etcB arecorrectly positioned.

-7.-5 All structural steel is protected from chemical solutions.

-7.-7 All structural steel ready to erect is prevented from water ordirt accumulated against any of the surfaces.

-7.9 All steel which will have concrete cast against them areclean and free from loose rust at the time of concreting.

-7.- All structural steel work comply with the standard technicalspecication

2&. PAVING AND TILING WORKS

Check: -

9.- *efore any paving starts, the mass concrete is completely freefrom standing water.

9. 6ement tiles conform to the standards.

9./ &n the mass concrete surface immediately before the bedding islaid, a slum of cement and water is brushed, unless specied.


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2%. WALL TILES

Check: -

-.- +all tiles are soaked in clean water before laying and taken out just before use.

-. Tiles are bedded with straight joints in cement and sand ;-G/< andgrouted in white cement.

-./ The work when completed is cleaned properly before approval.

-.0 'nly tiles free from defects are used for the construction.

22. PVC TILES

Check: -

.- 3L6 tiles are laid on oor screeds with approved glue and inaccordance with manufacturer@s instruction.

. 'nly tiles free from defects are used for the construction.

./ Damaged tiles are replaced with good ones at the contractor@s


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/.0 Asbestos cement sheet unless otherwise specied is 2mm thickwhen used for roong.

/.1 Asbestos cement accessories match the pitch of the sheets.

/.2 )alvani?ed plain and corrugated !)A sheets comply with themanufacturer@s specication.

/.4 #teel hook bolts and nuts are ?inc coated, the si?e and use of which shall be as per manufacturer@s instruction.

/.5 8i$ing of roong and ashing is made fully water tight andperformed to the standard of best workmanship.

/.7 6hiseler diamond edges and cover bead nails made of mildsteel round wires as used to $ galvani?ed steel sheet roongand ashing to timber members.

/.-9 #teel hook bolts and nuts are used to $ galvani?ed steelsheets and asbestos roong to steel and wooden trussmembers and purlins.

/.-- 8i$ing holes are drilled in crown of corrugation of roong sheets.

/.- Coles are 1mm larger in diameter than bolts or screws.

/.-/ Coles are 09mm far from edges of sheet.


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24. GUTTERS AND DOWN PIPES

Check: -

0.- )utters and down pipes are formed with the specied gauge

galvani?ed mild steel at sheet from suitable lengths and toshapes shown on the drawings.

0. )utter hangers and down pipe supports are .1mm anti=rustpainted at sheet spaced at - meter center ma$imum unlessotherwise specied.

0./ Moints of gutter are lapped -1cm and welded.

0.0 Moints of gutter after welding treated with three coats of ?incpaint.

2. CARPENTRY AND !OINERY

Check: -


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1.2 Timber and assembled wood work are stored in such a way asto prevent attack by termites, insects or decayed fungi.

1.4 Timber ready for use is free from live borer, beetle or otherinsect attack.

1.5 All measures to eradicate insect attach of timber are approved.

1.7 Timber is seasoned to moisture content of not more than 9>for carpentry and -> for joinery.

1.-9 All timber surface e$posed by cutting are treated with threecoats of approved preservations.

1.-- All pressure=impregnated timber is treated with preservativechemicals at a pressure of not less than -9 atmospheres and inaccordance with the chemical manufacturer@s instruction.

1.- 8i$ed joinery is completely protected from damage until thecompletion of the construction.

1.-/ 3role of sections is not modied from those shown on drawingswithout approval.

1.-0 (ight type of door is $ed in the right place and that the doorsswing in accordance to the drawings.


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2.- Eaterial and dimensions are according to the specications andthe drawings.

2. *efore any mounting, painting of parts in connection with theceiling such as steel guides and walls is completed.

2./ The ceiling is cleaned and well $ed when the work is completed.

27. PAINTING

4.- The kind of paints is according to the specications anddesigner@s instructions.

4. The painting is done according to the manufacturer@sinstructions.

4./ The paint is not diluted unless specied by the manufacturer.

4.0 All surfaces to be painted are clean from dust and dirt.

4.1 All surfaces to be painted are absolutely dry and free fromdefects before painting.

4.2 All brushes and tins used for painting are clean and free from

old paint.

4.4 The room is closed until the paint dries.


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29. WATER WELL

Check: -

7.- The water well is dug according to the specications anddrawings, if possible dug during the dry season.

7. &f septic tanks, soak away pits and dry latrines are situatednearby and inform the designer to change the position of the

wall.

7./ The water is tested and approved after the digging is completed.

7.0 The masonry work is not started before the test result is issuedand approved.

3&. WATER SUPPLY LINES

Check: -

/9.- The dimensions and types, tubes, valves and water tower inaccording to the specications and drawings.

/9. All valves, unless otherwise specied is buried in the ground to aminimum depth of /9cm.


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/-./ All joints rmly $ed before mass concrete is cast.

/-.0 3ipes and tubes are placed in the hard=core with minimum -9cmcovering layer sand or in channels of oors as indicated on thedrawings.

/-.1 All sanitary ware is properly $ed in the correct position.

/-.2 All connection between sanitary ware and sewer system is done

with the prescribed siphon.

/-.4 All e$posed pipes and tubes are well cleaned and painted asspecied.

/-.5 All sanitary work complies with the standard technicalspecication"drawings.

32. SEWER SYSTEM

Check: -

/.- Dimensions and types of pipes and inspection pits is according

to the specication and the drawings./. The e$cavation measurements of the sewer lines are according

to the drawings.


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/.5 All water proong is done according to specications anddrawings.

/.7 The joining of concrete to pies is always done with cementmortar, the joint completely lled all around.

/.-9 Moining of asbestos cement pipes is done according to themanufacturer@s instruction.

/.-- &nspection pit is according to the drawing before backlling.

/.- All pipes connected to the inspection pit come appro$imatelyon the same level and check channel formed in concrete at thebottom of the pit.

/.-/ *ackll soil is of good quality free from stones and it is not top

soil.

/.-0 *acklling is in layers of minimum 9cm, if vibrating or rollermachine is used the thickness of the layer can be 09cm unlessotherwise specied.

/.-1 !ach layer of backll is well rammed and consolidated with the

addition of water if necessary.

/.-2 The correct position of the water and sewer systems and


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//. The position of septic tank and soak away pit if situated nearbywater wells, and inform the designer for the change of thepositions.

//./ Ievel of overow pipes between di%erent chambers and inletand outlet pipes are according to the drawings.

//.0 All plastering in and out, it with cement plaster with thicknessand mi$ture according to specications and drawings.

//.1 All water proong is done according to specications anddrawings.

34. ELECTRICAL INSTALLATIONS

Check: -

/0.- !!36' or the designated professional approves the electricalinstallation.

/0. Eaterials to be used for the installation strictly follow thespecications and the drawings.

/0./ The electrical sub contractor has a valid certicate issued by

!!36' before he starts his work and his foremen are competent.

/0.0 The conduits are free from defects and cover the wires all the


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/0.-9 All trenches should be checked before pipes are laid.

/0.-- The pipes are laid on a minimum -9cm thick sand bed unlessotherwise specied.

/0.- The joining of cement pipes is done with cement mortar, the joint completely lled around.

/0.-/ The joining of cement pipes is done according to the

manufacturer@s instructions.

/0.-0 The inspection pits, pipes and joints are e$ecuted beforebacklling.

/0.-1 The backll soil is of good quality, free form stones and it is nottop soil.

/0.-2 The backlling is in layers of minimum 59cm if vibrating orroller machine is used the thickness of the layer can be 09cmunless otherwise specied.

/0.-4 !ach layer of backll is well rammed and consolidated with theaddition of water if necessary.

/0.-5 All underground cable joining are done in special water=tight junction bo$ approved by !!36' or designated professional.


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/2.2 And decide the place to pile up the e$cavated top soil and checkit is meters outside the building perimeter.

/2.4 And decide the place for the cart away, which is not necessary forbacklling or terracing.

/2.5 All backlling and terracing is done in layers not e$ceeding 9cmand if vibrating or roller machine is used the thickness must be09cm.

/2.7 !ach layer of backlling terracing is well rammed andconsolidated.

/2.-9 *acklling and terracing is not with top soil.

/2.-- All site work complies with the standard technical specication.

37. ROADS AND FOOT PATHS

Check: -

/4.- !$cavation for road footpaths is e$ecuted to bottom of hard=core.

/4. *acklling for roads and footpaths is done with non=e$pansiveselected material.


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/4.7 The thickness of hard=core is not less than specied.

/4.-9 The hardcore as well as the top surface is e$ecuted with aminimum slope of -G-99 towards the sides.

/4.-- The top surface is e$ecuted with material on the specication ordrawings.

38. DRAIN CHANNELS AND CULVERTS

Check: -

/5.- Drain channels are according to the measurements on thedrawingsG

/5. Drain channels to have a minimum slope of -G99, unlessotherwise specied.

/5./ #tone channels to be on a bed hard core or well compactedgravel with joints and pointing in cement mortar ;-G/


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/7. The foundations of fence and gate are according to thespecications and drawings.

4&. PREPARATION OF PAYMENT CERTIFICATE

09.- 3ayment certicate should be prepared on oHcial formats.09. 3ayment certicates should be prepared in suHcient copies as

needed.09./ 3ayment certicates should be signed byG =

i. The supervisor,ii. 6onsultant, if there is contract provision for such

supervisioniii. The contractor,iv. The investor"client

09.0 The supervisor shall check payment againstG =

-. Arithmetic error. 6ontract prices/. 6ontract quantities0. 6ontract time1. Actual measurement sheets

2. Lariation orders4. supplementary agreements5. Lalidity of performance bond


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• &nspection and measurement reports of the positioning of

reinforcement

• &mportant instruction received

• Description of any incidents

C#$%'()*#$ M+,'*+ '#,'*,%

Collow concrete blocks

• C"ass()cat(o$

Collow concrete blocks shall be classied in to the following threeclasses

%. C"ass * a$+ , are loaded bearing units and are suitable for

• !$ternal walls pointed, rendered and plastered

• The inner leaf of cavity walls or stone masonry

• &nternal walls or part ions.

2. C"ass C none load bearing units suitable for none load bearingwalls

and portions

:oteG = si$ full si?e samples shall be taken from a lot of 0999 blocks orf i h f f h i


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19 99 099 /1 -99

/99 99 099 09 -99

($(#u# co#ress(e stre$gth

The minimum compressive strength of C6* according to !#6D

C"ass *erage o ' u$(ts I$+((+ua" u$(ta a a a

A 0. 0 /.5 /5* /.1 /1 /. /

6 .9 9 -.5 -5

Co$crete


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• *leeding

Worka("(t 8resh mi$ed concrete should be easy to be transported, placed. 6onsolidatedand nished without any segregation. The workability of concrete is a%ectedby water content, si?e of aggregate shape of aggregate grading of aggregateetc.

Co$s(ste$c

6onsistency is closely related to workability. &t is a term which describes theease with which fresh concrete ows. &t is used to indicate degree of wetness.

easure#e$t o orka("(t

Among various methods of determining the workability of concrete the mostcommon method is slump test. &t is performed by measuring the subsidenceof a pile of concrete formed in a mould in the shape of a frustum of a conewith base diameter 9cm and top diameter -9cm and the height is /9cm. Atamping rod of steel -2mm diameter and 9.29m long is used to compact theconcrete in the mould. The slump which is the subsidence of the concretecone after the mould is lifted up and carefully observed gives the following

three results


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The recommendable slumps for various works are indicated below

No Te o co$struct(o$ ;"u# ($ ##Ea$ min

-

/

0

1

2

4

Ceavy mass construction

3avement

n reinforced footing casinos and

substructure walls

*ridge deck

(einforced foundation wall and footing

(einforced beams, slabs and walls

6olumns

19

19

41

41

-99

-1

-1

1

1

1

1

19

41

41

roert(es o har+e$e+ co$crete

&n the itNs hardened state the various properties which need considerationare

-< #trength

< 3ermeability/< Durability0< !lasticity1< #hrinkage


43/44


C"asses o co$crete

6oncrete is graded in terms of its characteristic compressive cube strengthattained at the age of 5 days in Epa. 8or e$ample 61 means characteristicscube compressive strength attained at the age 5 days ;1Epa


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Supervision and quality control check list ______________________________________ .

Ta"e: - #tandard mi$es for ordinary structural concrete per 19kg bag of cement;'36. ordinary port land cement<

Co$crete

gra+e

:ominal ma$. si?e ofaggregate;mm<

workabilitylimit of slump thatmay be e$pected;mm<

09 9 -0 -9Eedium

/9 to 29

Cigh

29 to -9

Eedium

9 to 19

Cigh

19 to -99

Eedium

-9 to /9

Cigh

/9 to 29

Eedium

-9 to 1

Cigh

1 to 19

C 5 Total aggregate ;kg<8ine aggregate ;c"c<Lol. nishedconcrete;m/<

209/9 = 019./-

119/9 = 019.41

109/1 = 199.44

059/2 = 199.1

= = = =

C %5 Total aggregate ;kg<8ine aggregate ;c"c<Lol. nishedconcrete;m/<

/49/9= 019.9

//9/9= 019.-5/

/9/1= 199.-45

59/1= 199.-2

= = = =

C 2& Total aggregate ;kg<8ine aggregate ;c"c<Lol. nished concrete;m/<

/91/9= /19.-21

49/9= 099.-11

59/9= 099.-12

19/1= 019.-0/

11/1= 019.-02

909= 199.-/

0909= 199.-/4

9901= 119.--

C 25 Total aggregate ;kg<8ine aggregate ;c"c<Lol. nished concrete;m/<

21/9= /19.-04

09/9= 099.-/4

09/9= 099.-/4

-1/1= 019.-4

9/1= 019.-/

-7109= 199.--5

-909= 199.-0

-4101= 009.--

C 3& Total aggregate ;kg<8ine aggregate ;c"c<Lol. nished concrete;m/<

/1/9= /19.-/0

-1/9= 099.-4

-9/9= 099.-0

-79/1= 019.--1

-71/1= 019.--1

-4909= 199.-92

-5909= 199.-97

-1901= 119.974

44

___________________________________________________________________________________________________________________________________________________________OWUDB

Documents

Supervision Check List