Hangers and Sleeving Flashcards
All hangers must be able to support
5 times the weight of water filled pipe plus 250 pounds
The length between the last hanger and last sprinkler head on 1” pipe is ____
36”
The length between the last hanger and last sprinkler head on 1 1/4” pipe is
48”
The length between the last hanger and last sprinkler head on 1 1/2” and larger pipe is ______
60”
The hanger closest to the last sprinkler shall prevent ______
Upward movement
Sprigs (candles) to be latterly supported when they exceed ____
4 feet
No less then ____ hanger per section of pipe except for starter pieces that are less than ___
No less than one hanger per section, except for starter pieces less then 6 feet
Distance between hanger and centre of upright sprinkler shall not be less than ____
3 inches
Hangers on mains shall be located between ____ _____ _____
Each branch line
4” or smaller pipe requires how big of rod
3/8”
5, 6, and 8” pipe requires how big of rod
1/2”
10” pipe requires how big of rod
5/8”
12” pipe requires how big of rod
3/4
What is the formula for trapeze
L=4(a)(b)
—————-
a+b
What 3 materials can be used for trapeze
Sch 10, Sch 40, Angle iron
How is angle iron installed for trapeze
With the longer leg vertical
How big can the holes be for trapeze
No bigger then 1/16+the size of the rod
What is the max slot size and distance between slots for trapeze
3 inches
Flexible sprinkler hose fittings require a hanger when over _____
6 feet
Metal deck supports can only be used by
Punching a hole and using a through bolt
Metal deck hanger can only support
1” pipe
Toggles can only be used with pipe sizes up too
1 1/2” or less
When drilling in the side of a beam, drilling must be done where ?
Above the centreline of the beam or above the bottom of reinforcing steel rods
Concrete fasteners can be used to support 4” when anchors are not spaced more then _____
10 feet
What is the minimum steel thickness for powder driven fasteners in steel
3/16”
Coach screw rods are for pipe ____ or less
4”
Pre drilled holes for coach screw rods are ____
1/8 smaller then the diameter of the thread
Where do risers need to be supported
Lowest level
Each alternate level above
Above and below each offset
At top of riser
Distance between riser supports shall not exceed
25 feet
What size pipe can be supported by a pipe stand that’s made from 2” and under 4 feet tall
Up to 10” pipe, Sch 40
What’s the minimum amount of anchors in a floor flange in a pipe stand over 4’ tall
4
What’s the minimum amount of anchors for a pipe stand if it’s under 4 feet tall
2
Purlin hanger types are
C & Z
What’s the max size pipe that can be hung off Perlin
4”
Max load for purlin hangers are
400lbs
In seismic systems, flex couplings must be used if the pipe is over what size
2 1/2”
Flexible couplings must be installed within ____ of the top and bottom of risers
24”
Flexible couplings must be installed within _____ of concrete walls or masonry walls
12 “
How big do sleeves need to be for pipe 1” to 3 1/2”
2” larger then the pipe size being run
What size do the sleeves need to be for pipe 4” and larger
4” larger then the diameter of the pipe being run
Lateral sway braces on feed, cross mains and branch lines over 2 1/2” are placed at a max
40 feet apart
Longitudinal sway braces on feed and cross mains are placed at
80 feet max
Hanger spacing for steel non threaded pipe 1” and 1 1/4 is
12 feet
Hanger spacing for steel non threaded pipe 1 1/2 to 8”
15 feet
Hanger spacing for threaded light wall 1-3”
12 feet
Hanger spacing for 3/4 and 1” copper
8 feet
Hanger spacing for copper 1 1/4 to 1 1/2 is
10 feet
Hanger spacing for copper 2-3” is
12 feet
Hanger spacing for copper 3 1/2 to 8”
15 feet
Hanger spacing for 3/4 CPVC
5’ 6”
Hanger spacing for 1” CPVC
6’
Hanger spacing 1 1/4 CPVC
6’6”
Hanger spacing 1 1/2 CPVC
7 feet
Hanger spacing 2” CPVC
8 feet
Hanger spacing 2 1/2 CPVC
9 feet
Hanger spacing 3” CPVC
10 feet
Ductile iron hanger spacing
15 feet
Common items used in hanger assemblies not required to be listed are
Steel rods, nuts, bolts, screws
What is the minimum required steel for welding studs
12 gauge
Hanger spacing when heads are 6 feet apart
12 feet
How are sleeves installed in a mechanical room
Typically 1-2” above finished floor
Materials that can be used as a sleeve
Steel pipe, plastic pipe, sheet metal, brass and copper
Penetrations in a firewall must be sealed how
The must be sealed to the same rating as the fire wall being penetrated
What is the F rating of fire stop
Flame spread ( fire rating )
T rating fire stop is
Temperature transfer rating
L rating In fire stop is
Air leakage
W rating for fire stop is
Water tightness
Intumescent material does what when exposed to fire
Expands
Penetrations through floors require fire stop on
One side
Penetration through walls generally require fire stop on
Both sides
What size pipe can toggles support in drywall
None
Annular space is
The space between pipe and sleeve
The distance between hangers supporting the trapeze is called
The span
Coach screws can be used in what material
Wood
Maximum hanger spacing when sprinklers are installed less then 6’ apart
12 feet
The minimum size anchor for pipe stands up to and including 3” shall be (above 4’)
1/2 anchors
The minimum size anchor for pipe stands over 4” in diameter shall be
5/8 anchors
If the pipe stand is under 4 feet and 2” in diameter what size anchors can be used
3/8
Toggle hangers are only permitted in ceilings with
Hollow tile or metal lath and plaster
Different kinds of fasteners in steel
Powder driven
Welded
Different kinds of fasteners in wood
Drive screws
Ceiling flanges and U hooks
Coach screw rods
Drive screws can be used with pipe
2” or less
