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A 4 in.

NFPA CWBSP Full Course Access
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A 4 in. (102 mm) nominal diameter Schedule 10 sprinkler main is to be supported from the structure utilizing a trapeze

hanger with a span of 8 ft (2.4 m). Using Schedule 40 pipe for the trapeze hanger, what is the minimum diameter pipe

that should be used?

A.

1.5 in. (40 mm)

B.

2 in. (50 mm)

C.

2.5 in. (65 mm)

D.

3 in. (75 mm)

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