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Crocodiles > Hangers and Sleeving > Flashcards

Hangers and Sleeving Flashcards

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
Q

What is the minimum steel thickness for powder driven fasteners in steel

A

3/16”

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26
Q

Coach screw rods are for pipe ____ or less

A

4”

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27
Q

Pre drilled holes for coach screw rods are ____

A

1/8 smaller then the diameter of the thread

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28
Q

Where do risers need to be supported

A

Lowest level
Each alternate level above
Above and below each offset
At top of riser

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29
Q

Distance between riser supports shall not exceed

A

25 feet

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30
Q

What size pipe can be supported by a pipe stand that’s made from 2” and under 4 feet tall

A

Up to 10” pipe, Sch 40

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31
Q

What’s the minimum amount of anchors in a floor flange in a pipe stand over 4’ tall

A

4

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32
Q

What’s the minimum amount of anchors for a pipe stand if it’s under 4 feet tall

A

2

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33
Q

Purlin hanger types are

A

C & Z

34
Q

What’s the max size pipe that can be hung off Perlin

A

4”

35
Q

Max load for purlin hangers are

A

400lbs

36
Q

In seismic systems, flex couplings must be used if the pipe is over what size

A

2 1/2”

37
Q

Flexible couplings must be installed within ____ of the top and bottom of risers

A

24”

38
Q

Flexible couplings must be installed within _____ of concrete walls or masonry walls

A

12 “

39
Q

How big do sleeves need to be for pipe 1” to 3 1/2”

A

2” larger then the pipe size being run

40
Q

What size do the sleeves need to be for pipe 4” and larger

A

4” larger then the diameter of the pipe being run

41
Q

Lateral sway braces on feed, cross mains and branch lines over 2 1/2” are placed at a max

A

40 feet apart

42
Q

Longitudinal sway braces on feed and cross mains are placed at

A

80 feet max

43
Q

Hanger spacing for steel non threaded pipe 1” and 1 1/4 is

A

12 feet

44
Q

Hanger spacing for steel non threaded pipe 1 1/2 to 8”

A

15 feet

45
Q

Hanger spacing for threaded light wall 1-3”

A

12 feet

46
Q

Hanger spacing for 3/4 and 1” copper

A

8 feet

47
Q

Hanger spacing for copper 1 1/4 to 1 1/2 is

A

10 feet

48
Q

Hanger spacing for copper 2-3” is

A

12 feet

49
Q

Hanger spacing for copper 3 1/2 to 8”

A

15 feet

50
Q

Hanger spacing for 3/4 CPVC

A

5’ 6”

51
Q

Hanger spacing for 1” CPVC

A

6’

52
Q

Hanger spacing 1 1/4 CPVC

A

6’6”

53
Q

Hanger spacing 1 1/2 CPVC

A

7 feet

54
Q

Hanger spacing 2” CPVC

A

8 feet

55
Q

Hanger spacing 2 1/2 CPVC

A

9 feet

56
Q

Hanger spacing 3” CPVC

A

10 feet

57
Q

Ductile iron hanger spacing

A

15 feet

58
Q

Common items used in hanger assemblies not required to be listed are

A

Steel rods, nuts, bolts, screws

59
Q

What is the minimum required steel for welding studs

A

12 gauge

60
Q

Hanger spacing when heads are 6 feet apart

A

12 feet

61
Q

How are sleeves installed in a mechanical room

A

Typically 1-2” above finished floor

62
Q

Materials that can be used as a sleeve

A

Steel pipe, plastic pipe, sheet metal, brass and copper

63
Q

Penetrations in a firewall must be sealed how

A

The must be sealed to the same rating as the fire wall being penetrated

64
Q

What is the F rating of fire stop

A

Flame spread ( fire rating )

65
Q

T rating fire stop is

A

Temperature transfer rating

66
Q

L rating In fire stop is

A

Air leakage

67
Q

W rating for fire stop is

A

Water tightness

68
Q

Intumescent material does what when exposed to fire

A

Expands

69
Q

Penetrations through floors require fire stop on

A

One side

70
Q

Penetration through walls generally require fire stop on

A

Both sides

71
Q

What size pipe can toggles support in drywall

A

None

72
Q

Annular space is

A

The space between pipe and sleeve

73
Q

The distance between hangers supporting the trapeze is called

A

The span

74
Q

Coach screws can be used in what material

A

Wood

75
Q

Maximum hanger spacing when sprinklers are installed less then 6’ apart

A

12 feet

76
Q

The minimum size anchor for pipe stands up to and including 3” shall be (above 4’)

A

1/2 anchors

77
Q

The minimum size anchor for pipe stands over 4” in diameter shall be

A

5/8 anchors

78
Q

If the pipe stand is under 4 feet and 2” in diameter what size anchors can be used

A

3/8

79
Q

Toggle hangers are only permitted in ceilings with

A

Hollow tile or metal lath and plaster

80
Q

Different kinds of fasteners in steel

A

Powder driven
Welded

81
Q

Different kinds of fasteners in wood

A

Drive screws
Ceiling flanges and U hooks
Coach screw rods

82
Q

Drive screws can be used with pipe

A

2” or less

Crocodiles (8 decks)

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