Scaffolding subcontractor’s supervisor shall be responsible for erection and dismantling of scaffolding works under over all supervision of main contractor’s Project Engineer and foreman.
3. Work Permit:
All the necessary work permits shall be obtained from IOC prior to start of scaffolding works.
Adequate safety precautions shall be ensured by safety officer and scaffolding supervisor as per standard safety procedure of IOC during the erection and dismantling of scaffolding.
Proper PPE shall be worn by scaffolding operators while carrying out the scaffolding works. At no stage the safflowers shall be allowed to put themselves at risk.
5. Work Procedures:
The scaffolding material will be delivered to site and stacked properly at work place / lay down area designated by client.
Scaffolding supervisor will inspect all the scaffold materials to ensure that all the tubing and fittings are free of corrosion and in good condition prior to start of work.
All scaffolding to be erected as per approved drawing and it will be ensured that scaffold erected is capable of being utilized as access scaffold with intermediate platforms connected with aluminum ladders for this purpose.
The scaffolding will be structured in such a manner that it gives one working platform with minimum four boards wide for the removal and replacement as per site requirements. Additional bracings will be provided in the locations where existing ground / floor is sloping.
All scaffolding will comply with BS1139 and shall be inspected, approved and scaffold tagged by IOC/INDIAN safety department, prior to being used.
All the scaffolding will be erected by recognized scaffold personnel under immediate supervision of experience supervisor.
The supervisor shall be made fully aware of the design and purpose of the scaffold, ensuring that it is erected within the safety factors that are required for its purpose.
The scaffold for west / east head wall will be of cantilever hanging type construction, for the intended purpose of cleaning the outside wall. The hanging scaffold will be hung off heavy duty 4mtr ladder beams cantilevered out off the top of the wall. The ladder beams will be tied back to the opposite side of where the hanging scaffold will be, and double braced to counter act the access scaffold.
The scaffold will be built with a safety factor of 2:1 and 10% impact loading against collapsing, supporting a maximum, weight uniformly distributed of 8-10 average persons with hand tools only on one level at any one time.
The north head wall scaffold will be of hanging type construction, for the intended purpose of cleaning the outside wall. The hanging scaffold will be hung off heavy duty 6 meters ladder beams between each set of column’s. Load bearing fittings will be used for the complete construction.
The scaffold will be built with a safety of 2:1 against collapsing, supporting a maximum weight uniformly distributed of 4 average persons with hand tools only on each scaffold between columns. Life jackets will be provided for the personnel’s working on sea face north wall.
At no time will the maximum permitted weight agreed upon for each scaffold is exceeded and at no time what so ever will anyone remove any tubes or fittings other than the authorized scaffolding personal.
The scaffold will be inspected by the scaffold supervisor / safety officer on a regular basis to ensure that there are no problems with the scaffold.
External and Internal scaffolding drawing.
(i) All surfaces to be treated must be clean and free from dust or loose material.
(ii) All laitance must be removed by blasting, or other suitable removal methods.
(iii) Ensure that any exposed blow holes are filled with Nitomortar FC.
(i) The contents of the resin should be thoroughly stirred to disperse any possible settlement.
(ii) The entire contents of the hardener resin container should be poured into the base container and the two materials mixed thoroughly.
(iii) The two components should be mixed together mechanically using a slow speed drill, with proprietary mixing paddle attachment.
(iv) Mixing should be carried out continuous for 3 to 5 minutes, until a uniform consistency is achieved.
(v) Mixing should take place in an open, well-ventilated area.
Prior to application ensure that the substrate is completely free of all moisture.
(i) The material should be immediately applied, ensuring that a continuous coating of uniform recommended thickness is obtained in two coats.
(ii) The first coat must be firmly applied and well scrubbed into the surface.
(iii) Ensure a uniform coating with a wet film thickness not less than 400 microns.
(iv) The first coat should be allowed to dry for not less than 6 hours and not more than 24 hours.
(v) The second coat should be applied within the above limits achieving wet film thickness not less than 400 microns.