Are joist hangers necessary on my deck?

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Old 04-08-19, 10:34 PM
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Are joist hangers necessary on my deck?

Hi, I am rebuilding my deck. It is a low deck (under 40" at high point) which I am building to be a floating deck, not attached to the house. The joists span across 4x6 beams which are no further than 6' OC. The joists themselves rest on the beams perpendicularly. The rim joist will float from the beam less than 3" or not at all. So really it's the crossing joists that bear the load, running perpendicular to the beams on 16" and 12" centers. Composite deck boards on top using concealed fasteners. (perpendicular over 16" spaced joists and 45 degrees over 12" spaced joists.

In this scenario, do I really need to attach the joists to the rim joists using joist hangers? Should I use end nails or end screws? It seems to me that I need the tensile strength of screws here more than the shear strength of nails or the hangers.

This is a cost+time question.

Thanks for your response.
 
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Old 04-09-19, 04:31 AM
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No, you do not need hangers on the rims (unless your inspector makes you, which would be over and above every code) and you can use screws to attach the rim, according to the DCA6, you must use a minimum of 3, #10x3 screws. If nails, 3, 10d threaded nails.
 
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Old 04-09-19, 05:44 AM
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Along with obtaining a permit, pass all questions by the local building inspector before proceeding. No rework required when inspector is on board.
 
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Old 04-09-19, 06:50 AM
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The end grain of wood by far has the least screw or nail holding power.
If that board decides to twist as it drys out there just going to pull out.
The only screw I would even concider for this is a 5" long Ledger Lok screw.
When I build something I only want to have to do it once, and using hangers is the only way I would do this.
 
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Old 04-09-19, 07:14 AM
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You could also use Simpson A34 Framing Clips. Only about $35 for a box of 100 and you could use Simpson screws.
 
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Old 04-11-19, 01:16 AM
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thanks

Thanks everyone for your advice.
 
 

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