FRAMELESS GLASS INSTALLATION
METHOD STATEMENT FOR FRAMELESS GLASS
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Main-contractor to provide grid-line and other reference line as
requested.
Establish glass line offset from grid-line as dimension in accordance to
approved shopdrawings.
Transfer setting up on floor slab to underside of beam and mark out
with markers.
Locate Grid, which should be the center of glass screen and then mark
at position of each glass panel size onto floor slab. These shall also be
the exact positions of glass fins and or steel mullions.
Likewise to point 3, transfer glass fin/steel mullions position to
underside of slab.
Drill holes onto floor slabs to receive the MI2 expansion bolts, ensuring
the required amount of penetration.
Scaffolding as provided shall be erected then proceed to drill holes to
underside of slabs.
The steel work/brackets will be delivered to site at this stage and
carefully store in avoidance to contact with rainwater.
Fit the hanger brackets/V channel etc. onto the anchor bolts and
tighten.
Repeat the same procedure for all hanger brackets/V channels.
After completing the above work, reference from the benchmark
provided by the contractor, check all the level of the brackets installed,
if necessary, adjust and confirm. Then carry out the final checking and
tighten up all bolts securely.
Next is to insert fin-shoes onto position and tightened up bolts.
Secure vertical ‘u’ channels to bolt and walls and check for alignment.
After the completion of steelwork, request for inspection by maincontractor.
On arrival of glass shipment, delivery to site will be by lorry. Carefully
unload and store in an area not subjected too much traffic likewise
away from water.
The glazing team shall consist of about 8 men. Firstly clean the fin
glass/steel mullions’ surface of dust and place suction pumps onto
glass. Lift the glass into position up to level and secure with fastening
bolts onto mullions.
The rest of the fin glass/steel mullions shall be installed in sequence.
After the completion of installation to the fin glass/steel mullions, check
for in-out alignment by pulling a piano-wire from one end to the other
end of the wall.
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With the scaffolding erected to the external full-face, the method of
installing the face glass shall be from the top to bottom level and center
outwards.
Secure mechanical hoisting equipment at concrete beam and lift top
face glass into position if necessary.
The sequence of installation shall be distributed towards one end of the
grid to the other.
After the total completion, commence application of sealant, (see
Sealant Application Guidelines) and clean-up glass for inspection and
handover.
METHOD TO SAFEGFUARD MATERIALS FROM DAMAGES ON SITE
Glass:
1. The glass will be securely placed on steel racks with each panel labelled
clearly identifying the types and quantity within.
Delivery will be in progressive manner.
2. The racks will be stored vertically in a clean dry area provided by the maincontractor on site and ensure additional protection to prevent the ingress of
water by covering with a vinyl or canvas sheet.
Steel-Work:
1. The steelwork will be properly stacked for easy handling. They are also to
be stored in a dry location as water may be damaging to the unavoidable
scratches during handling.
SEALANT APPLICATION GUIDELINE
When installation/application of silicon the following procedures apply:1. Surface Preparation
- Joint faces should be clean, dry, sound and free from any
contaminants likely to impair adhesion.
Remove any loose or friable surfaces such as cement laitance etc.
- If necessary, clean substrate with Xylol or Methyl Ethyl Ketone (MEK),
do not use soap and water. If required, apply the recommended Primer
and allow to dry.
2. Joint Design Considerations
- Joint size should be 4 times the anticipated movement.
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For optimum performance, the width to depth ratio of sealant should be
2:1 subject to a minimum depth of 10mm on porous substrates and
6mm on non-porous substrates.
Sealant width should never be less than sealant depth.
For fillet joints the minimum bite onto each surface should be 10mm for
porous substrates and 6mm for non-porous substrates.
3. Application
- Recommended application temperature range +5°C to +40°C.
Install on approved closed or open cell round polyethylene joint
backing to control the depth of sealant. Use correct size backing rod to
achieve recommended compression (approx. 20-30%).
- A self-adhesive bond breaker tape can be used when the joint shape
does not allow the use of joint backing.
- Dry tooling is recommended, immediately after application of sealant.
4. Method of Application
Sealant is supplied in a non-sag consistency, which flows easily using
conventional skeleton guns for cartridge and full barrel bulk guns for
sausages.
5. Cleaning
Remove excess sealant and smears adjacent to the joint (use masking
tape where appropriate).
Equipment may be cleaned with MEK while Xylol cured sealant can only
be removed mechanically.
6. Tooling
If tooling is required, it must be done immediately after application before a
skin develops. Tooling ensures firm, full contact with joint interfaces.
7. Health and Safety Precaution
- Avoid contact with skin and eyes. May cause irritation and skin
sensitization. Product contains flammable solvent. Always ensure
adequate ventilation and keep away from flames and ignition sources.
- Material Safety Data Sheet must be read and understood before use.
8. Shelf Life
Shelf life shall be nine (9) months when stored as recommended in original
unopened containers.
9. Guarantee/Warranty
Silicon products manufactured to rigid standards of quality. Any product
which has been applied (a) in accordance with manufacturer’s written
instructions and (b) in any application recommended by the manufacturer,
but which is proved to be defective, will be replaced free of charge.