pipe]. Maximum allowable size for storm drain is 375 mm (15
inches). Base storm frequency on local code.
9.3
Kitchen waste shall be provided with a grease removal system.
9.4
Do not drain outside building sub-soil drain tile to an interior
sump pump. If a pump is required, locate it outside of the
building.
9.5
Where reduced pressure backflow preventers are required (Master
Specification 15400), provide positive drainage.
10.
INTERIOR FUEL GAS SYSTEM
Design in accordance with NFPA 54.
11.
RISER DIAGRAMS
11.1
Provide diagrams for the following systems installed within the
buildings: Soil, waste and vent; cold water; hot water; hot water
return; fuel gas; and storm water systems.
11.2
Riser diagrams may be shown flat, or in isometric projection. Show
story heights, size of all horizontal and vertical piping, fixture
numbers being served, and means of connection between fixtures and
the stacks and mains. Show each system complete and continuous.
12.
SEISMIC REQUIREMENTS
12.1
GENERAL:
A.
Earthquake-resistive design shall comply with the requirements
of Design and Construction Procedures, "Natural Disasters Non-
Structural Resistive Design", the latest edition of "Seismic
Design Requirements", and the Uniform Building Code (UBC)
published by International Conference of Building Officials
(ICBO).
B.
Earthquake-resistive design for equipment shall be provided
where peak horizontal ground acceleration, "Z" is 0.10g or
greater and for piping where "Z" is 0.20 or greater. The "Z"
values for VA sites are listed in "Seismic Design
Requirements". These values must be verified with VA for a
specific project before proceeding with the design.
C.
Plumbing equipment and certain piping shall be braced in
accordance with the most current edition of Seismic Restraint
Manual Guidelines for Mechanical Systems (SMACNA) and National
Uniform Seismic Installation Guidelines (NUSIG).
D.
Unless otherwise shown by SMACNA or NUSIG, provide required
details and structural calculations to completely address
seismic bracing requirements. See paragraph 12.4
"CALCULATIONS".
E.
SMACNA does not cover all conditions such as, providing
bracing details for seismic restraints of equipment or details
of flexible joints when crossing seismic or expansion joints,
or bracing of in-line equipment, etc.
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