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| Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Acceptable deflections
Awl--
When choosing beams for supporting roofs, floors, etc, what is an acceptable deflection over a given length? I'm looking at a 12 ft beam, supported at 0, 6, 12 ft, and depending on the beam I choose (and various point/distributed loads), I'm winding up w/ deflections of between .010 and .033 between supports, ie, at about 3 and 9 ft. What is acceptable? Is this a matter of local codes, or do rules-of-thumb apply here? -- Mr. P.V.'d formerly Droll Troll |
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