substitution request - Alliance Construction Solutions

Project No.: 10145
550 15 th Street Dual Brand Hotel
12/23/2011
and laid in bed of sand with 3” minimum cover on all sides unless otherwise
noted. Compaction per Division 2.
a. Fittings shall be double-wrapped with second layer extended a minimum
of 12” beyond fittings.
B. Sanitary Waste and Vent; Roof Drain and Storm Drain Piping:
1. Verify all invert elevations of existing waste and storm drain piping prior to any
new work.
2. Install plumbing drainage piping with minimum 1/4” per foot (2%) downward
slope in direction of drain for piping 3” and smaller. Install 4” and larger piping
with minimum 1/8” per foot (1%) downward slope unless otherwise indicated on
drawings and when approved by Administrative Authorities where 2% slope is
impractical due to depth of street sewer or building structural limitations. Install
cast iron pipe in accordance with the Cast Iron Soil Pipe Institute Handbook.
3. Install 1” thick extruded polystyrene over underground drainage piping above frost
line and not under building. Provide width to extend minimum of 12" beyond
each side of pipe. Install directly over pipe, centered on pipe center line.
4. Make changes in direction for drainage and vent piping using appropriate 45
degree wyes, half-wyes, or long-sweep quarter, sixth, eighth, or sixteenth bends.
SANITARY CROSSES OR SHORT QUARTER BENDS SHALL NOT BE USED IN
DRAIN PIPING. Where two fixtures are installed back to back, they may be served
by a common vertical drain pipe with each fixture wasting separately into an
approved double fitting having inlet openings at the same level.
5. Provide thrust restraints (bracing to structure or rodded joints) at branches and
changes in direction for cast iron pipe 5” and larger suspended within the
building.
6. Where cast iron piping is suspended in excess of 18” on single rod hangers, sway
bracing shall be provided to prevent shear at the joints.
7. Install underground drain piping to conform with the plumbing code, and in
accordance with the Cast Iron Soil Pipe Institute Engineering Manual.
8. Lay piping beginning at low point of system, true to grades and alignment
indicated, with unbroken continuity of invert.
9. Place bell ends or groove ends of piping facing upstream.
10. Install gaskets in accordance with manufacturer's recommendations for use of
lubricants, cements, and other special installation requirements.
11. Grade trench bottoms to provide a smooth, firm, and stable foundation, free from
rock, throughout the length of the pipe.
12. Remove unstable, soft, and unsuitable materials at the surface upon which pipes
shall be laid, and backfill with clean sand or pea gravel to indicated invert
elevation.
13. Shape bottom of trench to fit the bottom 1/4 of the circumference of pipe. Fill
unevenness with tamped sand. At each pipe joint, dig bell holes to relieve the bell
of the pipe of all loads, and to ensure continuous bearing of the pipe barrel on
the foundation.
14. No-hub cast iron pipe couplings shall be torqued to 100-125 inch-pounds.
15. Grade vent piping for proper ventilation (minimum 1/8” per foot) and to allow
piping to free itself quickly of condensation of water.
C. Condensate Drain Piping:
1. Condensate drain piping from air conditioning unit coil condensate drain pans
shall be of the sizes shown on the drawings.
22 1116 - 11 BASIC PLUMBING PIPING