CONTENTS:1. Scope of works 2. Project Organization for Health
& Safety Control3. Health & Safety Risk and Control
4. Access / Egress5. Lighting6. Plant & Equipment7.
Personnel Training Certificate
8. Hazardous Materials & Substances9. Waste Management10.
Special Control MeasuresAppendixes Appendix 1: Checklist for Under
Floor TrunkingAppendix 2: Project Organization for Health &
Safety control
Appendix 3: Risk Assessment
Appendix 4: Personnel Training Certificate1. Scope of WorksScope
of ActivitiesThe Under Floor Trunking system shall confirm to the
material and fabrication requirements as per this specification.
This scope defines the minimum standards to be adopted when
installing under floor Trunking in buildings and structures
according to Electrical specification of client. Under Floor
Trunking shall be installed in structural slab floor according to
construction co-ordination drawings. Site ProcedureSite
mobilization shall be done with real time monitoring the conditions
& progress of builder works. Before commencement of the work,
carry out examination of the physical condition of the area.
Photographs should be taken where necessary, prior to commencement
and during works. Method StatementI. Preparation stage
a. Prior to install under floor trunking; examine the
containment paths to ensure all areas free of debris that may
interfere with the installation.
b. Under floor trunking generally bundled and ship to site for
delivery.c. Special care must be exercised using slings so the
under floor trunking is not crushed from the improper location and
lifting by sling.
d. To prevent from damage of under floor containment, never pull
the containment from truck trailer by chaining to bottom rung and
dragging out of trailer.
e. To prevent damage to under floor trunking, never pull from
truck trailer by chaining to bottom rung and dragging out of
trailer.
f. Inventory all items immediately after unloading, using
manufactures packing list.
g. Under floor trunking should be stored away from high traffic
areas. UFS (Under Floor system) should be stacked by width and
type.II. Installation stage:Under Floor Trunkinga. Site survey the
proposed routing as per approved CSD / Shop Drawing by Foreman and
Sub-Contractor.b. Installation must be carried out based on
approved shop drawings and samples by Foreman and Sub-Contractor.c.
The under floor trunking system shall be suitable for use in the
distribution of power, telephone and data service within concrete
slabs or floor screeds and finishes in accordance with the layouts
as in the construction drawings.
d. The under floor trunking system supplied shall be complete
inclusive of all necessary trunking, junction boxes, services
outlet boxes, services outlets accessories, plates, vertical access
boxes, pedestal outlets boxes, duct outlets, flyover units, radius,
bends, jointing sleeves, fixing clips and all other accessories
necessary to bring about a complete working system. e. The method
of installation of the under floor trunking system shall comply to
the manufacturers instructions and shall be as appropriate for
cast-in-situ system or floor screeded system. The type of system is
cast-in-situ or floor screeded as shown in the drawings.
Junction Box
f. The junction boxes shall be flushed with the final finished
floor level and the junction box base frame and pillar supports
shall be manufactured of zinc alloy die-cast in one piece to give
the base unit the mechanical strength. g. The junction box lid and
metal flyover shall epoxy coated and the trap cover shall be of
zinc alloy die-cast heavy load bearing materials. h. The trap cover
with recess, suitable for vinyl tile, carpet or ceramic tile floor
finish, shall be installed for the junction box. i. The junction
box shall be provided with overlapping flanges for securing onto
the floor slab, and flyover for segregation of intersecting cables.
j. Knock-out trunking outlets shall be provided on all 4 sides of
the junction box and the trap cover supported by the frame and
height adjustable pillar screws shall be provided with neoprene
rubber gaskets to prevent noise and ingress of moisture and
dust.
Service outlet boxk. The concealed services outlet floor boxes
for power data and/or telephone outlets shall be manufactured of
zinc alloy die-cast heavy load bearing materials and the base frame
and pillar support shall be zinc alloy die-cast in one piece,
complying with BS 1004 : 1972 (1985).l. The trap lifting handle
shall be retractable into the trap cover without the need of
cutting the floor finish materials and it shall not protrude from
the trap cover. The lid, frame and accessories plate shall be epoxy
coated for protection and against corrosion.m. The junction boxes
and concealed outlet floor boxes shall be supplied with disposable
screeding lids, so that the traps will not be covered with cement
or concrete during screeding or casting of concrete and the traps
shall only be installed after screeding and/or casting.n. Generally
the services outlet box shall be supplied with multiple lids for 2
compartments services outlets and 1 lid for 3 compartment services
outlet.o. Select the correct size under floor trunking by Engineer,
Foreman and Sub-Contractor.p. Install the correct size Trunking,
anchor bolt and supporting brackets by Foreman and
Sub-Contractor.q. Check to ensure no sharp edge within the under
floor trunking compartment by Foreman, Assistant Foreman and
Sub-Contractor.r. Under floor trunking installation- Use the duct
layout plan to select a fixed starting point for the installation,
for example a junction box.s. Tie two guide lines at 90 deg to each
other, ensuring that they match the duct layout plan.
t. Position the first junction box centrally below the
intersection of the guide lines and level to required screed
depth.
u. Lay duct/ trunking sections to reflect the layout plan.
Ensure ducting compartments are aligned as indicated by the
continuous marking on the top of the duct.v. Open the pre-punched
side walls of the under floor box and insert the duct as far as it
will go.
w. Fasten the under floor/junction box and readjust to required
screed depth level.
x. Fasten the duct section at coupling devices to the
concrete.
y. Ensure external duct partition markings are aligned.
z. Attach an earth continuity connector at all duct couplings or
joints.
aa. Marking- Using a square that reaches across width of the
under floor trunking, gauge off the edge of one side and mark both
flanges. Next, position the square and mark the trunking. Marking
can be done with scribe, marking pen, or a pencil.
ab. Cutting- The cut can be using a hand held hacksaw, carbide
tipped circular saw, diamond dusted blades, hand held band saw,
offset bolt cutters or high speed grinder. It is important to get
square cut to ensure good splice connection. Under floor trunking
manufactures offer jigs and other devices to aid in the field
cutting. After cutting, smooth the cur edges to remove any
burrs.ac. Refer the planning and installation pictures.ad. After
installation of under floor trunking, Engineer-in-charge shall
check the complete works and complete the Inspection checklist for
Electrical Under floor trunking installation works. (See Appendix
1)ae. Engineer-in-charge shall arrange and request for inspection
with the Owners representative Residential Technical Officer (RTO)
using approved Main con Request for Inspection (RIN) form. III.
Approved Materials
Preferred Brand for Under FloorTrunkingLipko, Sakiya, Applicam,
U-Li
2. Project Organization for Health & Safety Control(See
Appendix 2)3. Health & Safety risks and controls(Please refer
to attach Risk assessment in respect to above scope of works
Appendix 3)4. Access / EgressNIL5. LightingAdequate temporary/task
lighting shall be provided if work to be carried at night or at
dark places.6. Plant & EquipmentS/NDescriptionUnit
1Metal cutting saw 1 lot
2Touch up material1 lot
3Screw driver1 lot
4Electrical drill with bits (only for surface installation
works)1 lot
5File 1 lot
6Tape measure1 lot
7P.P.E. Personal Protective Equipment (safety
helmet,Boots,gloves & safety vest )1 set per worker
*The above machinery & Equipment used quantity will be
varied depending on site conditions and production rate.7.
Personnel Training Certificate
( Appendix 4 )
8. Waste managementThe Rubbish which would be created from our
scope of works will be disposed to the designated dumping ground.9.
Special Control measuresThe following general control measures
against Safety, Environment and Quality shall be required for our
scope of work and special control measures are not applicable for
us Proper PPE must be worn at all time Permit to work at height
> 2m where applicable
Lifting operation permit (using crane) where applicable.
Confined space permit where applicable.
Approved work method statement and risk assessment will be made
available to site. All workers doing the work shall be briefed on
this method statement and risk assessment.
APPENDIX 1:Checklist for
Under Floor Trunking Installation
APPENDIX 2:
Project Organizationfor Health & Safety
Control
APPENDIX 3:
Risk Assessment
APPENDIX 4:
Personnel Training Certificate
