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
D. In preparing for laying the pipes in trenches, the pipes and fittings may be unloaded
along the trench direct from the back of a truck. Ducts and fittings should be
unloaded on the side opposite to backfill. Fittings including end bells, couplings and
other accessories such as solvent cement and lubricant shall be stored at the trench
site under cover to prevent loss or damage.
E. When storing on site, PVC pipes and other similar items shall be placed a level
surface and shall be supported to minimize distortion, and protected from direct
sunlight. Horizontal supports of adequate width shall be spaced not more than 1.5 m
centre to centre beneath pipes to provide continuous and even support.
F. Vertical side supports shall be provided at 3 m spacing on rectangular stacks. The
maximum free height of such stacks shall not exceed 1.5 m.
PART 2 - PRODUCTS
2.01 GENERAL
A. Underground Electrical Services for power, lighting, low current systems, control
cables and grounding shall comprise manholes and handholes interconnected via
concrete encased PVC pipes, direct buried PVC pipes or cable trenching; all as
shown on the Drawings and mentioned in the Specifications or required on site for
proper installation and maintenance of electrical systems.
B. Any trenching, backfilling, compaction and general grading required for electrical
works shall be carried out in accordance with the requirements given in civil works
specs.
C. Any metal frames, covers, louvers, etc. related to the works described under this
Section shall be carried out in accordance with the requirements given in civil works
specs.
D. Any cast in place concrete related to underground electrical services described
under this Section shall be carried out in accordance with Section 03300.
2.02 DUCT BANKS