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Questions tagged [span-tables]

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6
votes
5answers
18k views

Can I use the area above my garage for storage?

The ceiling joists in my garage are 2x8 spaced 24" o.c., and span 21'. The roof load appears to be carried by the walls, so the joists seem to only be in place to hold the drywall. I'd like to use ...
2
votes
3answers
2k views

Acceptable joist depth for a second set of ceiling-only joists

Background I'm installing a new ceiling in the kitchen of the bottom unit of a multi-family home. The house is quite old and uses 2x8 (actually 2"x7.5", not 1.5"x7.5", due to era of lumber) over a ...
1
vote
2answers
2k views

Understanding deck spans for beams.

I've been looking at various span charts for decks and I'm still not quite sure how to calculate it all when you take into account not just the joists, but the beams and posts as well. What we ...
1
vote
1answer
15k views

How far apart should I space rafters for a 13ft patio?

I'm looking to build a patio roof (shed style) and need to span 13ft. I've found several span tables online, some of them with different maximum distances between the rafters. Is it ok to use 2x8s ...
1
vote
1answer
485 views

ceiling joist allowable span southern california

I'm adding ceiling joists in my garage. It's a 19' span between walls, and I'm using structural or #1 lumber. Should I use 2x8x22 OR 2X10X22 spaced 12" on center? I'll be adding 1/2" or 5/8" drywall.
0
votes
1answer
764 views

2x6 deck joists: salvageable or need replacing?

We have a roughly 10x30 elevated wood deck off the pack of our house. The joists are all 2x6 16oc. The posts are 4x4 and are holding up a beam that the joists hang off of with joist hangers. I feel ...
0
votes
2answers
3k views

Span of roof rafters, how to fix improper structure

I'm building a carport that is 30x24 ft including a 20x24 gable and 10x24 lean to. It currently has 2x4 roof rafters spaced 24" with collar ties about a foot below the gable peak, so 5-6 ft long ties. ...
0
votes
1answer
4k views

Will 2x10 13'6" span support outdoor bbq?

I am building a deck and will have 2x10 joists. I want to put a BBQ that unfortunately will run parallel with the joists, so the last two joists will support the full weight of the BBQ distributed ...
0
votes
1answer
3k views

Can a 2x6 beam span 11ft?

I need to span a beam 11' between two 6x6 posts to support the rafters for a covered pergola. I was thinking of fastening 3 pieces of 2x6 together to create a stronger piece. Is it possible? Is there ...
0
votes
1answer
64 views

joist bridge for hanging porch seating

Want to build and hang a "bed/sofa" 64Lx32W on PT deck w/PT 7x2x10' rafters 16"oc. Spacing of rafters wrong for hanging. I can cut down size of the seating, but it defeats objective. QUESTION: can ...
0
votes
1answer
40 views

Allowable load tables based on usage

When looking at allowable load tables from Simpson for their joist hangers, why are there different numbers for different cases, even though the force is in the same direction? For example, the LUS24 ...
0
votes
1answer
109 views

6 x 12 header capability

I need to support a ridge beam on one end with a Douglas fir 6 x 12 x 12 ft long header. The load will be on a single point in the center and will be about 8000 lbs total. I can't tolerate sag as ...
0
votes
3answers
337 views

How much shear load can rebar withstand?

I'm thinking of integrating rebar into a short grape trellis as horizontal supports for the vines to climb on. Is there anywhere I can get the deflection/load information for rebar spans? As currently ...
0
votes
2answers
3k views

Can I calculate beam size if I know length, and weight support requirements?

I am interested in hanging a heavy-bag/swing/aerial yoga bands - but am concerned about hanging from a strong enough beam. I have tried to read lots about deflections of different material based on ...
0
votes
1answer
596 views

Pergola span 2x6x16

I've been thinking about putting a pergola in my back yard using 4x6 post mounted on top of a cement slab. I want it to be 8ftx16ft. I want to use 3 post in the rear of the pergola, and just 2 in the ...
0
votes
0answers
26 views

Beam span for covered patio…please help?

I hope someone out there can help me out. I have a pergola type patio that I am putting a 3/12 roof over. Right now it is supported by 6 x 6 post that are 13 feet apart. There are 2 2x10's running ...
0
votes
3answers
232 views

maximum ceiling joist to beam span without joist hangers

I'm building a tray ceiling and the assembly is easy to visualize. In a 14' x 14' dining room, I'm coming in 18.5" to the inside of the beam on 2 sides with a 2x10, and then similarly cross-wise ...