Piping supports Flashcards
Hangers shall be designed to support ___ times the weight of the water-filled pipe plus ___ at each piping support.
5x the weight of the water + 250 lbs at each piping support
Sprinkler piping shall not be used to support ___ system components.
non-system components.
Sprinkler piping shall be permitted to utilize shared support structures in accordance with 17.1.4.
There are pre-approved rods and fasteners that don’t have to be ____
Listed. They’re engineered already to support 5x the weight of the water-filled pipe + 250 lbs.
Up to 4” hangers ___ rod
5” to 10” hangers ___ rod
12”+ hangers ___ rod
up to 4” hangers 3/8” rod
5” to 10” hangers 1/2” rod
12”+ hangers 3/4” rod
U-Hooks rod sizes:
Up to and including 2” - ___
2 1/2” to 6” - ___
8”+ - ___
Up to and including 2” - 5/16”
2 1/2” to 6 - 3/8”
8”+ - 1/2”
When using post-installed anchors to hang pipe vertically, pipe that is larger that is __ or larger, hangers must not be spaced more than ___ apart.
When using post-installed anchors to hang pipe vertically, pipe that is larger that is 4” or larger, hangers must not be spaced more than 10’ apart.
Holes for post-installed anchors in the side of the beams shall be above the ___ of the beam or above the bottom reinforcement steel rods.
Above the centerline of the beam
Powder-driven studs, welding studs, and the tools used for installing these devices shall be listed? True or false.
True
Holes for bolts or rods shall not exceed ___ “ greater than the diameter of the bolt or rod.
The hole cannot exceed 1/16” the diameter of the bolt or rod.
Powder-driven studs should not be used in steel of less than ___ total thickness.
In steel less than 3/16” total thickness.
Welding studs or other hanger parts shall not be attached by welding to steel less than U.S standard ___ gauge
12 gauge welded steel
Drive screws shall only be used in a horizontal position as in the side of the beam and only for __” pipe
2” pipe.
True or false. Drive screws shall only be used with hangers that require 2 points of contact.
True
All holes for lag screws shall be pre-drilled __ “ less in diameter than the maximum root diameter of the lag screw thread.
holes must be 1/8” less in diameter.
True or false. Nails are acceptable for hangers
False.
True or false. You can use coach screw rods to hang pipe 4” or larger.
False. 3/8” coach screw roads only for pipe less than 3” in diameter.
Toggle hangers shall be permitted only for the support of pipe ___” or smaller in pipe size under ceilings of hollow tile or metal lath and plaster.
1 1/2” or smaller pipe size.
If flexible sprinkler hosing exceeds __ ft in length, it must be supported by a hanger.
6ft
Branch line hangers attached to metal deck shall be permitted only for the support of pipe __ “ or smaller in size.
1” pipe or smaller. Unless an engineer has signed off on it saying you’re allowed to use the bigger pipe.
Maximum hanger spacing for steel pipe except for threaded light wall:
1” pipe - ___
1 1/4” pipe - ___
1 1/2” or larger - ___
1” pipe - 12ft
1 1/4” pipe - 12ft
1 1/2” pipe and larger - 15ft
The distance between a hanger and the centerline of an upright sprinkler head shall not be less than __ “
3”
Unsupported lengths 3-4-5 Rule:
1” pipe - ___
1 1/4” pipe - ___
1 1/2” pipe or larger - ___
1” pipe - 3ft
1 1/4” pipe - 4ft
1 1/2” pipe or larger - 5ft
Unsupported lengths for copper tube is ___ whatever it is for steel.
1/2 the length
True or false.Where the maximum static or flowing pressure exceeds 100psi the hanger assembly supporting the pipe should be of a type that restrains the upward movement of the pipe. FOR PENDANTS.
True.
Unsupported lengths for 1” pipe in pendent position or drop nipples cannot exceed __ “
Hanger cannot be more than 12” from the end. 6” for copper pipe.
Unsupported armover to a sprinkler, sprinkler drop, or sprig shall not exceed __ “.
What if psi exceeds 100?
24” for steel. 12” for copper.
If psi exceeds 100 these measurements cut in 1/2.
Sprigs ___ ft or longer shall be restrained against lateral movement
4ft
The unsupported length of the end of a main shall be no greater than ___ the maximum allowable hanger spacing
One half.
Risers shall be supported by riser clamps or by hangers located on the horizontal connections within ___” of the centerline of the riser.
24 inches
True or false. Riser clamps anchored to the wall using hanger rods in the horizontal position can be used to vertically support risers.
False
In a multistory building, riser supports shall be installed on which floors at a minimum?
the lowest level, at each alternate level above, above and below offsets, and at the top of the riser.
Distance between the supports for risers shall not exceed ___ ft
25ft
Pipe stands used in galvanized applications shall be made of what?
Galvanized steel or other suitable corrosion-resistant materials.
