pipe weight

MNicolai

Well-Known Member
ETCP Certified Technicians
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1. Pipe weight (also referred to as line weight), is the weight of line set before anything is hung from it. This includes the weight of the batten, wire rope, trim chain, and possibly other components that factor into the weight of batten when nothing is suspended on it.

The practical use for line weight is as a reference point. When all items are struck from a counterweight set, the set is to be balanced for "pipe weight" or "line weight" which for facility users is effectively the lowest amount of weight they will ever need on a given counterweight set. The only reason to remove the other weights from the arbor that maintain balance when at line weight is when competent persons are performing maintenance on the rigging systems, but often those same weights will remain in the arbor from the day the systems are installed to the day they are removed or replaced.

Often, counterweights representing line weight will be painted to ensure they are not accidentally removed during a strike. In the photo below, notice that the yellow painted weights are also steel banded to the arbor, further preventing the accidental removal of the "pipe weight". The banding practice is becoming more common and is, in fact, recommended by many rigging companies.

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Photo Courtesy of Wikimedia.

2. From http://www.engineeringtoolbox.com/ansi-steel-pipes-d_305.html , the weight of 1.5" (1.90 O.D.) ANSI Schedule 40 steel pipe is 2.72 pounds per linear foot. From http://www.engineeringtoolbox.com/ansi-steel-pipes-d_306.html , 1.5" Schedule 80 pipe is 3.65 lb/ft.
 

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