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Hangers and Sleeving Flashcards

(82 cards)

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1
Q

All hangers must be able to support

A

5 times the weight of water filled pipe plus 250 pounds

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2
Q

The length between the last hanger and last sprinkler head on 1” pipe is ____

A

36”

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3
Q

The length between the last hanger and last sprinkler head on 1 1/4” pipe is

A

48”

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4
Q

The length between the last hanger and last sprinkler head on 1 1/2” and larger pipe is ______

A

60”

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5
Q

The hanger closest to the last sprinkler shall prevent ______

A

Upward movement

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6
Q

Sprigs (candles) to be latterly supported when they exceed ____

A

4 feet

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7
Q

No less then ____ hanger per section of pipe except for starter pieces that are less than ___

A

No less than one hanger per section, except for starter pieces less then 6 feet

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8
Q

Distance between hanger and centre of upright sprinkler shall not be less than ____

A

3 inches

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9
Q

Hangers on mains shall be located between ____ _____ _____

A

Each branch line

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10
Q

4” or smaller pipe requires how big of rod

A

3/8”

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11
Q

5, 6, and 8” pipe requires how big of rod

A

1/2”

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12
Q

10” pipe requires how big of rod

A

5/8”

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13
Q

12” pipe requires how big of rod

A

3/4

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14
Q

What is the formula for trapeze

A

L=4(a)(b)
—————-
a+b

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15
Q

What 3 materials can be used for trapeze

A

Sch 10, Sch 40, Angle iron

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16
Q

How is angle iron installed for trapeze

A

With the longer leg vertical

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17
Q

How big can the holes be for trapeze

A

No bigger then 1/16+the size of the rod

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18
Q

What is the max slot size and distance between slots for trapeze

A

3 inches

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19
Q

Flexible sprinkler hose fittings require a hanger when over _____

A

6 feet

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20
Q

Metal deck supports can only be used by

A

Punching a hole and using a through bolt

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21
Q

Metal deck hanger can only support

A

1” pipe

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22
Q

Toggles can only be used with pipe sizes up too

A

1 1/2” or less

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23
Q

When drilling in the side of a beam, drilling must be done where ?

A

Above the centreline of the beam or above the bottom of reinforcing steel rods

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24
Q

Concrete fasteners can be used to support 4” when anchors are not spaced more then _____

A

10 feet

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25
What is the minimum steel thickness for powder driven fasteners in steel
3/16”
26
Coach screw rods are for pipe ____ or less
4”
27
Pre drilled holes for coach screw rods are ____
1/8 smaller then the diameter of the thread
28
Where do risers need to be supported
Lowest level Each alternate level above Above and below each offset At top of riser
29
Distance between riser supports shall not exceed
25 feet
30
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
31
What’s the minimum amount of anchors in a floor flange in a pipe stand over 4’ tall
4
32
What’s the minimum amount of anchors for a pipe stand if it’s under 4 feet tall
2
33
Purlin hanger types are
C & Z
34
What’s the max size pipe that can be hung off Perlin
4”
35
Max load for purlin hangers are
400lbs
36
In seismic systems, flex couplings must be used if the pipe is over what size
2 1/2”
37
Flexible couplings must be installed within ____ of the top and bottom of risers
24”
38
Flexible couplings must be installed within _____ of concrete walls or masonry walls
12 “
39
How big do sleeves need to be for pipe 1” to 3 1/2”
2” larger then the pipe size being run
40
What size do the sleeves need to be for pipe 4” and larger
4” larger then the diameter of the pipe being run
41
Lateral sway braces on feed, cross mains and branch lines over 2 1/2” are placed at a max
40 feet apart
42
Longitudinal sway braces on feed and cross mains are placed at
80 feet max
43
Hanger spacing for steel non threaded pipe 1” and 1 1/4 is
12 feet
44
Hanger spacing for steel non threaded pipe 1 1/2 to 8”
15 feet
45
Hanger spacing for threaded light wall 1-3”
12 feet
46
Hanger spacing for 3/4 and 1” copper
8 feet
47
Hanger spacing for copper 1 1/4 to 1 1/2 is
10 feet
48
Hanger spacing for copper 2-3” is
12 feet
49
Hanger spacing for copper 3 1/2 to 8”
15 feet
50
Hanger spacing for 3/4 CPVC
5’ 6”
51
Hanger spacing for 1” CPVC
6’
52
Hanger spacing 1 1/4 CPVC
6’6”
53
Hanger spacing 1 1/2 CPVC
7 feet
54
Hanger spacing 2” CPVC
8 feet
55
Hanger spacing 2 1/2 CPVC
9 feet
56
Hanger spacing 3” CPVC
10 feet
57
Ductile iron hanger spacing
15 feet
58
Common items used in hanger assemblies not required to be listed are
Steel rods, nuts, bolts, screws
59
What is the minimum required steel for welding studs
12 gauge
60
Hanger spacing when heads are 6 feet apart
12 feet
61
How are sleeves installed in a mechanical room
Typically 1-2” above finished floor
62
Materials that can be used as a sleeve
Steel pipe, plastic pipe, sheet metal, brass and copper
63
Penetrations in a firewall must be sealed how
The must be sealed to the same rating as the fire wall being penetrated
64
What is the F rating of fire stop
Flame spread ( fire rating )
65
T rating fire stop is
Temperature transfer rating
66
L rating In fire stop is
Air leakage
67
W rating for fire stop is
Water tightness
68
Intumescent material does what when exposed to fire
Expands
69
Penetrations through floors require fire stop on
One side
70
Penetration through walls generally require fire stop on
Both sides
71
What size pipe can toggles support in drywall
None
72
Annular space is
The space between pipe and sleeve
73
The distance between hangers supporting the trapeze is called
The span
74
Coach screws can be used in what material
Wood
75
Maximum hanger spacing when sprinklers are installed less then 6’ apart
12 feet
76
The minimum size anchor for pipe stands up to and including 3” shall be (above 4’)
1/2 anchors
77
The minimum size anchor for pipe stands over 4” in diameter shall be
5/8 anchors
78
If the pipe stand is under 4 feet and 2” in diameter what size anchors can be used
3/8
79
Toggle hangers are only permitted in ceilings with
Hollow tile or metal lath and plaster
80
Different kinds of fasteners in steel
Powder driven Welded
81
Different kinds of fasteners in wood
Drive screws Ceiling flanges and U hooks Coach screw rods
82
Drive screws can be used with pipe
2” or less

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