Piping supports

Question 1

Hangers shall be designed to support ___ times the weight of the water-filled pipe plus ___ at each piping support.

Answer 1

5x the weight of the water + 250 lbs at each piping support

Question 2

Sprinkler piping shall not be used to support ___ system components.

Answer 2

non-system components.

Sprinkler piping shall be permitted to utilize shared support structures in accordance with 17.1.4.

Question 3

There are pre-approved rods and fasteners that don’t have to be ____

Answer 3

Listed. They’re engineered already to support 5x the weight of the water-filled pipe + 250 lbs.

Question 4

Up to 4” hangers ___ rod
5” to 10” hangers ___ rod
12”+ hangers ___ rod

Answer 4

up to 4” hangers 3/8” rod
5” to 10” hangers 1/2” rod
12”+ hangers 3/4” rod

Question 5

U-Hooks rod sizes:
Up to and including 2” - ___
2 1/2” to 6” - ___
8”+ - ___

Answer 5

Up to and including 2” - 5/16”
2 1/2” to 6 - 3/8”
8”+ - 1/2”

Question 6

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.

Answer 6

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.

Question 7

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.

Answer 7

Above the centerline of the beam

Question 8

Powder-driven studs, welding studs, and the tools used for installing these devices shall be listed? True or false.

Answer 8

True

Question 9

Holes for bolts or rods shall not exceed ___ “ greater than the diameter of the bolt or rod.

Answer 9

The hole cannot exceed 1/16” the diameter of the bolt or rod.

Question 10

Powder-driven studs should not be used in steel of less than ___ total thickness.

Answer 10

In steel less than 3/16” total thickness.

Question 11

Welding studs or other hanger parts shall not be attached by welding to steel less than U.S standard ___ gauge

Answer 11

12 gauge welded steel

Question 12

Drive screws shall only be used in a horizontal position as in the side of the beam and only for __” pipe

Answer 12

2” pipe.

Question 13

True or false. Drive screws shall only be used with hangers that require 2 points of contact.

Answer 13

True

Question 14

All holes for lag screws shall be pre-drilled __ “ less in diameter than the maximum root diameter of the lag screw thread.

Answer 14

holes must be 1/8” less in diameter.

Question 15

True or false. Nails are acceptable for hangers

Answer 15

False.

Question 16

True or false. You can use coach screw rods to hang pipe 4” or larger.

Answer 16

False. 3/8” coach screw roads only for pipe less than 3” in diameter.

Question 17

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.

Answer 17

1 1/2” or smaller pipe size.

Question 18

If flexible sprinkler hosing exceeds __ ft in length, it must be supported by a hanger.

Answer 18

6ft

Question 19

Branch line hangers attached to metal deck shall be permitted only for the support of pipe __ “ or smaller in size.

Answer 19

1” pipe or smaller. Unless an engineer has signed off on it saying you’re allowed to use the bigger pipe.

Question 20

Maximum hanger spacing for steel pipe except for threaded light wall:
1” pipe - ___
1 1/4” pipe - ___
1 1/2” or larger - ___

Answer 20

1” pipe - 12ft
1 1/4” pipe - 12ft
1 1/2” pipe and larger - 15ft

Question 21

The distance between a hanger and the centerline of an upright sprinkler head shall not be less than __ “

Answer 21

3”

Question 22

Unsupported lengths 3-4-5 Rule:
1” pipe - ___
1 1/4” pipe - ___
1 1/2” pipe or larger - ___

Answer 22

1” pipe - 3ft
1 1/4” pipe - 4ft
1 1/2” pipe or larger - 5ft

Question 23

Unsupported lengths for copper tube is ___ whatever it is for steel.

Answer 23

1/2 the length

Question 24

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.

Answer 24

True.

Question 25

Unsupported lengths for 1” pipe in pendent position or drop nipples cannot exceed __ “

Answer 25

Hanger cannot be more than 12” from the end. 6” for copper pipe.

Question 26

Unsupported armover to a sprinkler, sprinkler drop, or sprig shall not exceed __ “.
What if psi exceeds 100?

Answer 26

24” for steel. 12” for copper.

If psi exceeds 100 these measurements cut in 1/2.

Question 27

Sprigs ___ ft or longer shall be restrained against lateral movement

Answer 27

4ft

Question 28

The unsupported length of the end of a main shall be no greater than ___ the maximum allowable hanger spacing

Answer 28

One half.

Question 29

Risers shall be supported by riser clamps or by hangers located on the horizontal connections within ___” of the centerline of the riser.

Answer 29

24 inches

Question 30

True or false. Riser clamps anchored to the wall using hanger rods in the horizontal position can be used to vertically support risers.

Answer 30

False

Question 31

In a multistory building, riser supports shall be installed on which floors at a minimum?

Answer 31

the lowest level, at each alternate level above, above and below offsets, and at the top of the riser.

Question 32

Distance between the supports for risers shall not exceed ___ ft

Answer 32

25ft

Question 33

Pipe stands used in galvanized applications shall be made of what?

Answer 33

Galvanized steel or other suitable corrosion-resistant materials.