Framing ceiling when distance too great
dbtex
| Posted in Construction Techniques on
How does one determine the best solution (most economical) way to frame ceiling joist when the distance exceeds the prescriptive distance and there are no intermediate walls. One story house stick framed rafters. Outside to outside wall is 30 feet 4 inches. Wall that will support beam, LVL or king truss is 12 feet 4 inches OS to OS.
Edited 10/9/2009 3:42 pm ET by dbtex
Replies
Estimate the costs of the various alternatives (ie beam, trusses, I joists etc.). Consider ease of installation and desireability of final product and then do what you want. If you post details of your loads and spans you may get some suggestions.
Do you mean the span is too far for a aprticular joist? What are the joist dimensions that are called out?
Forrest
Joist are not called out.
engineered steel "I" beam sitting in beefed up pockets at each wall, need a rented crane, some muscle help and you got it
I hope this is not to general of an answer, but
go visit a sales rep at you local lumber yard. my yard has an engineer/salesman for a truss/engineered lumber outfit who stops in at least once a week
I give my sales rep a drawing and if it is not too elaborate he can call it in, or wait until the engineer comes by. the engineer runs the calcs, then gives me an engineering cover sheet that I hand over to the town with my permit application
I pay the engineer nothing. he makes his money on the sale of the structural system
Are you saying the house dimensions are 30ft-4 X 12ft-4? You want to install ceiling joists...not floor joists...and I take it you are worried about headroom by running a beefed up beam? If so, run the beam up in the attic and hang the ceiling joists using simpson hangars. The beam could be one, or 2 engineerd "I" joists or LVL beams spaced apart evenly and spanning from wall to wall. Attach beams to existing wall top plates so that beams are elevated to accommodate height of desired ceiling joists.
Ceiling joists will sit on each wall plate and span the required distance...the hangar attachment points from joist to beam reduces the joist's overall span requirements.
Make sure beam load path runs directly to ground ( ie...beams must be sitting on load bearing walls so to distribute loads, otherwise a post must be attached underneath each beam load path and that post must run to foundation.)
I am not at all clear on what you are describing or asking for
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Thanks for posting that; I can't figure it out either and was starting to wonder....
;o)
Dinosaur
How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....
It happens a lot - people are ego-centric by nature and they look at their specific problem/scenario and describe about a third of the pertinent information, assuming that we can see all the rest of the setting, but not realizing there are a dozen or a hundred other variables that apply
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!