floor joists

05-07-2010, 04:56 PM	#1
tothebrit Newbie   Join Date: May 2010 Posts: 3	floor joists i am putting in a 2nd story room above the garage, what size should the joist be & what centers should they be at, the total span is 30ft with a header across at 13 ft from one side so the span is 13.2ft & 16.8ft that meet at the header. thanks for any help, the brit

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05-07-2010, 07:32 PM	#2
Yoyizit It was a dark and stormy     Join Date: Jul 2008 Location: NW of D.C. Posts: 5,954	floor joists How bouncy do you want this floor at what live & dead load? L/180, L/360?

05-07-2010, 09:13 PM	#3
Gary in WA Moderator   Join Date: Mar 2009 Posts: 8,765	floor joists http://www.colonie.org/forms/building/bdspanab.pdf Be safe, Gary __________________ Clothes taking longer to dry? Clean the dryer screen in HOT water if using fabric softener sheets. They leave a residue that impedes air-flow, costing you money. Clean the ducting in the last six months? 17,000 dryer fires annually!

05-07-2010, 11:00 PM	#4
tothebrit Newbie   Join Date: May 2010 Posts: 3	floor joists Thanks for the reply, i put in the floor above the house living space, 7 that was 2x8's. not sure of the support under (supporting walls etc.). floor i put in 3/4 ply, seems to be firm with no bounce. but this has 2x6 with 3ft spacing. i Put in the header, 8X12x22 with 4x4 supports 5ft apart.