substitution request - Alliance Construction Solutions

Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
exceeds 10 feet, a second layer (180°) steel shield shall be used for
additional strength.
TABLE 1
Pipe Size 1/2” to 2” 2-1/2” to 5” 6” to 10” 12” to 18” 20” to 24”
Insulation Length (in.) 6 9 9 12 24
Shield Length (in.) 4 6 6 9 18
Gauge of Steel* 24 20 16 16 16
*Bottom saddle only; top saddle may be one gauge lighter.
4. Thermal Inserts: Provide a 360° insert of high density water-proofed calcium
silicate at all supports for all insulated piping larger than 2” and for all piping
required to be clamped. Insulation inserts shall extend one inch beyond sheet
metal shield on all chilled water lines. Provide 180° inserts at clevis and roller
hangers. Provide 360° inserts for all trapeze and clamped supports.
L. Except where governed by more stringent local codes, install piping hangers with the
following minimum rod sizes and maximum spacing as indicated in Table 2 below:
Pipe Material Pipe Size
TABLE 2
Max. Hanger
Spacing
Min. Hanger Rod
Diameter
Steel, Schedule 40 & 80, filled with 1/2" 5'-0" 3/8"
water 3/4" 6'-0" 3/8"
1" 7'-0" 3/8"
1-1/4" 8'-0" 3/8"
1-1/2" 9'-0" 3/8"
2" 10'-0" 3/8"
2-1/2" 11'-0" 1/2"
3" 12'-0" 1/2"
4" 14'-0" 5/8"
5" 16'-0" 5/8"
6" 17'-0" 3/4"
8" 19'-0" 7/8"
10" 22'-0" 7/8"
12" 23'-0" 7/8"
Steel, Std. Weight, filled with water 14" 25'-0" 1"
16" 27'-0" 1"
18" 28'-0" 1"
20" to 24" 30'-0" 1-1/2"
Copper, Types K, L, M and DWV 1/2" 6'-0" 3/8"
3/4", 1" 8'-0" 3/8"
23 0529 - 8 HANGERS AND SUPPORTS FOR
HVAC PIPING AND EQUIPMENT