7/27/2019 Waterproof Specs.pdf

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Specification No. MEW/ZSROP/RO1 5ROC(1) - 21 Contractor's Initial & Stamp

floors with profiled steel sheeting. All proprietary galvanized edgings and void fillers shallbe incorporated into the floor construction.

Suspended floors shall be of concrete construction where necessary to give the requiredfire rating.

5ROC.1.2.12.2 Roofs

All roofs for plant related buildings shall generally be of lightweight construction using asuitable plastic coated galvanized steel insulated sheeting system. Where it is required tosite heavy plant on roofs or if there is a specific fire protection requirement, then a flatconcrete roof construction shall be provided.

All concrete roofs will be of RC slab construction (similar to floor construction outlinedabove) with waterproof membrane, insulation and concrete ballast/wearing surface asdetailed in this specification.

Access for maintenance purposes shall be provided to all plant and equipment situated onthe roofs. On lightweight roof construction this shall be provided by means of suspendedsteel walkways, stairways and ladders complete with all handrails and kickplates. Access

routes shall be obvious and shall exclude the need to walk directly on the roof sheeting.

5ROC.1.2.12.3 Walls

Generally, the external elevation of all plant and non plant buildings shall be clad withmasonry to the lower levels and lightweight sandwich panels over. For some buildings thelightweight panels are used full height, and in these instances a precast plinth shall beprovided to obviate damage to the external wall zone.

A concrete or masonry wall shall be provided at all locations and floor levels where there isa possibility of damage from traffic, forklift trucks etc, unless suitable protective barriers areprovided.

Masonry panel walls shall be used as necessary within the buildings and built in steel postsor other suitable alternatives shall be provided as necessary for lateral stability. The designand detailing of all masonry shall be in accordance with ACI 530.1 Specification forMasonry Structures and the Uniform Building Code 1997 (UBC). Special reinforcing detailsset out in the UBC for seismic zone in which the R.O. Plant site falls shall be adhered to. Itshould be noted that there are no special construction detailing provisions for seismic zone1.

5ROC.1.2.12.4 Stairs

All stairs within buildings shall be of reinforced concrete or prefabricated steel construction.Generally all stairs within RC buildings shall be of RC construction. Stairways within steelframed buildings shall be either of RC or steelwork construction as appropriate.

5ROC.1.2.12.5 Electric travelling overhead cranes

Overhead electrically operated travelling cranes (EOT) shall be provided by the Contractor.

Permanent lifting facilities shall be provided for plant maintenance purposes for all items ofplant where access excludes the use of temporary/mobile facilities and for certain items ofplant where the expected maintenance is carried out on a frequent basis. EOT cranes shallbe designed for the heaviest component it will be expected to lift and remove formaintenance.

Suspended floors shall be of concrete construction where necessary to give the requiredfire rating.

concrete roo s w e o s a construct on s m ar to oor construct on out nea ove w t waterproo mem rane, nsu at on an concrete a ast wear ng sur ace aseta e n t s spec cat on.

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routes s a be obvious and shall exclude the need to walk directly on the roof sheeting.