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Old 09-21-2010, 01:58 PM   #1
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Deck Builders, Need Your Advice

After months of procrastinating I finally have a design for the deck I want to build. I designed it according to the IRC Deck Construction Guide but I would really like some comments from someone who has done this a few times. Main question: Does this look structurally sufficient? Thanks for your help.

I have two sketches posted at:


Summary of design is

28' long, against house
13' 4" deep
24" above grade
Beams and deckboards perpendicular to length
4 beams attached to 8 piers (no posts)
Beams: doubled 2X10 PT SYP
Beam span 10'3" with 1'6" and 1'7" cantilevers
Beam spacing 8'
Joists: 2X8 PT SYP
Joist span:8' with 2' cantilevers
Joist spacing: 16"
Deck boards: 5/4X6 Siberian Larch

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Old 09-22-2010, 05:13 PM   #2
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Deck Builders, Need Your Advice

Couldn't see the diagram after 1 minute waiting. Joists are fine, beams are 1610# loaded good for 2376#, ok there. Remember to dig the footings within 5' of the house at least as deep as the house footings on undisturbed soil, as per Deck Code. Be sure to get a permit for liability in case of accident with paper trail for H.O.Insurance carrier. Waiting for the pic's!


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Old 10-05-2010, 10:09 AM   #3
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Deck Builders, Need Your Advice


Thanks for the tips. Sorry that the previous link didn't work. I uploaded the drawings to another file host. Any other comments or suggestions from you guys would be great.

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Old 10-05-2010, 09:01 PM   #4
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Deck Builders, Need Your Advice

20" diameter footings seem a bit small. Not sure where you are, but the footers here would be 32" square or larger.

And 24" overhang on the joists is probably a bit long. Shorten that up to about 16".
Originally Posted by Bud Cline View Post
Go ahead and apply for a variance, those guys at City Hall can use a good laugh.

Last edited by jlhaslip; 10-05-2010 at 09:03 PM.
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