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Unread 07-01-2013, 16:31
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AKA: George Chisholm
FRC #1360 (Orbit Robotics)
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Join Date: Jul 2011
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Location: Oakville, Ont, Canada
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Re: Discrepancy in dimensions for steel tubes for pyramid

Quote:
Originally Posted by Mongai View Post
pg 19 paragraph 1 of the game manual:



Yet the Team drawings for the field say they are 1 1/4 in. diameter steel tubes. We need a clarification on this, please.
The actual field parts are dia 1.5 steel tube. The team drawings call for 1.25 pipe. Steel tube is measured by outside diameter. Pipe is measured by outside diameter and wall thickness - called Schedule. 1.25 pipe has on OD of 1.66 - 0.160 over 1.50 so it isn't a match. Schedule 40 (the most common) has a wall thickness of 0.140 for an inside diameter of 1.38 Pipe is cheaper and more readily available (Home Despot) than steel tube. It can also be threaded and fittings are readily available for it.