Specifications

NAIROBI OPERATIONAL HUB
UNOPS Building, UN Lane, Off UN Avenue Tel: [phone]
P.O Box 783,Village Market, 00621 E-mail: [e-mail]
Nairobi, Kenya Website: www.unops.org
UNOPS is ISO 9001 certified
C. Individual hangers, trapeze hangers and riser clamps shall be provided for
supporting conduit and all parts and hardware shall be zinc-coated (galvanized).
D. Pipe straps and hanger rods shall be fastened to concrete by means of inserts or
expansion bolts, to brickwork by means of expansion bolts and to hollow masonry
by means of toggle bolts. Wooden plugs and shields shall not be used for
fastening pipe strips and hangers.
E. Under no circumstances shall duct work, piping and mechanical equipment be
used for supporting electrical facilities.
3.03 Sleeves, Chases and Openings
A. Pipe sleeves for all electrical conduit passing through walls, partitions, ceiling,
floors, etc.., shall be of sufficient length to extend through the full thickness of the
construction, with ends flush with the finish on each side, unless noted otherwise.
B. The Contractor shall provide necessary chases and openings in the walls,
partitions and floors to accommodate his work.
C. Chases, sleeves and openings in fire rated walls and floors (telephone, electrical
closets, etc.) shall be packed with acceptable mineral wool insulation or approved
flexible barriers designed for the purpose shall be used. Only UL or similar listed
and certified material shall be installed. The fire rating shall not be less than the
related wall.
D. Whenever any of the work of the electrical system has to pierce any water
proofing, this work shall be done with care and after the part of the system has
been put in place through this waterproofing, the opening made by same shall be
waterproofed and made absolutely watertight.
3.04 Cutting and Patching
A. The Contractor shall provide chases, holes and openings for the installation
purposes and carefully fit around, repair, patch and otherwise make his work
acceptable.