Small deck / landing question

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Old 10-14-16, 07:13 AM
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Small deck / landing question

Hey, just got done with these stairs, and decided I want a large landing (or basically small deck) above this patio. I want the deck height to be a the same height as the 3rd stair (this is nice because I can just take one step up into the garage). I'm trying to figure out how to do this with 4 posts, but I think I need 6. I don't really want the deck to extend under the stairs, so basically the deck will be an L shape. I realize if it was a square I could definitely get away with 4 posts.

Yes I know I can't put posts on patio blocks, I'll pull up the block(s) where needed and put a tube in.

If you see a way to get it done with 4, I'd love to hear it! Disregard the post heights in my drawing.

Thanks.

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Old 10-14-16, 10:09 AM
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What is the height difference between the patio and the garage floor?
 
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Old 10-14-16, 10:13 AM
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26.5".....................
 
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Old 10-14-16, 10:17 AM
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I'm thinking you'd just need the 4 posts for the landing and then attach stringers to it for the 3 steps. I'm not sure if you need railing after 2 steps or 3. I'm just a painter the carpenters should be along later.
 
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Old 10-14-16, 10:20 AM
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3 posts, as drawn in the bottom photo. Ledger on the garage, epoxy 1/2" anchor bolts into the concrete. Space the ledger 1/2 from the concrete with stacks of galvanized washers. The 3 6x6 posts should sit above grade on top of post bases that are anchored to concrete columns (sonotubes).
 
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Old 10-14-16, 10:32 AM
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Haha I knew someone was going to suggest a ledger into the foundation. I was hoping to avoid it but if that gets me 3 posts then so be it.

Not sure if it was clear but those bottom two steps would be cut off.

For anchor bolts... wedge or sleeve anchors? What's the difference, and when would you use each?

If no ledger on the garage... then 6 posts are needed, right?

Tx.
 
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Old 10-14-16, 10:50 AM
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If no ledger, 5 posts... one at each outside corner. A hanger will take the place of a post at the inside corner.

You could also epoxy 1/2" threaded galvanized ready rod into the concrete, and use washers and nuts. Whatever you use, you need 2 1/2" embedded.

Wedge anchors are better for solid concrete, sleeve anchors are for porous concrete, block and brick.
 
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Old 10-14-16, 11:37 AM
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Not to drag this discussion into the weeds, but is there a concrete anchor that's removable? Maybe a lag shield?
 
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Old 10-14-16, 04:16 PM
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Not that meets any sort of code.
 
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Old 10-17-16, 06:46 AM
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Do I need to have beams for this 10x10 platform? I was hoping to get away with notching out the 6x6s and carraige-bolting the outside double-joists to them.
 
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Old 10-17-16, 06:51 AM
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If you have a ledger next to the house, a beam on the outside (doubled) is all you need. If you go with freestanding, it needs a double on each end.
 
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Old 10-18-16, 06:03 AM
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Deck guide says 3 2x12s for 10' beam span w/ 10' joist span. 3 2x12s seems like way overkill for such a small deck!

3 2x8s says 8'3" beam span... I might just go with this.
 
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Old 10-18-16, 07:16 AM
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Your joist span will be closer to 8' (2 212's) if your joists are bearing on top of the beam, because the span is measured between the beams. Its not overkill, it's about calculated weights and deflection.

Your beam span can be reduced by cantilevering it past the post. Beams are permitted to cantilever past the end posts up to 1/4 of the beam span between posts. (Center of post - center of post) Your posts could easily be around 7' apart, which would drop the beam size down to 2 2x10's.

Joist size would be minimum of 2x8 the way it looks.
 
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Old 04-18-17, 04:22 PM
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Back to this... I'm trying to figure out the best way to tie the bottom of the stairs to the deck. I'm thinking of just using a double joist and use hangers to hold the stringers. I drew quick picture of this.

Thanks.

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Old 04-18-17, 04:36 PM
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Going with your thinking, you may can incorporate these with the stringers. Simpson Strong-Tie Z-MAX 2 in. x 6 in. 18-Gauge Galvanized Light Adjustable U Joist Hanger-LSU26Z - The Home Depot
 
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Old 04-18-17, 05:53 PM
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Oh yes those will definitely be used.
 
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Old 04-19-17, 06:32 PM
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Is this acceptable for securing a double joist to a ledger? Or should both joists of the double joist be on the face of the ledger with a concealed hanger?

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Old 04-20-17, 03:30 AM
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That is fine, but I would still utilize an inside corner brace on the blue-to-black connection
 
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Old 04-21-17, 05:32 PM
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I just realized that between the beam and joists, that's 16.5"... and I don't think there's room for any posts! Do I need to switch to joist hangers instead of joist-on-beam?
 
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Old 05-04-17, 12:34 PM
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What should my spacing be on the wedge anchors for the ledger? Not sure which row to use here...

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I'm in the 8-10' column.
 
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Old 05-05-17, 03:59 AM
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OK the ledger is on.

Was just thinking, I'll need to use much shorter nails / screws than usual since I can't go into the concrete when attaching the hangers. What is generally used for this?
 
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Old 05-05-17, 04:26 AM
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1 1/2" #10 HDG Simpson Strong Tie joist hanger nails. Not ideal, but rock and hard place.
 
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Old 05-06-17, 06:42 PM
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Got a lot done today...

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Old 05-06-17, 07:02 PM
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Looks pretty good! Don't forget you need to use all the hanger holes for a hanger to work as advertised and to pass an inspection.
 
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Old 05-06-17, 07:09 PM
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Yeah just getting things together before the rain... will put them in later.
 
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Old 05-06-17, 07:22 PM
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Yeah, saw you still have more hangers to install.
 
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Old 05-10-17, 07:33 AM
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What do you guys use for fastening the deck railing to the posts? I usually just screw them together, but I was looking for something a little more nice-looking, like a bracket.
 
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Old 05-10-17, 07:49 AM
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If the rail goes between posts, a dado and toe nailing is nice.
 
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