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Old 02-26-2012, 03:08 PM  
RockyMtnBlue
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Default Deck Question

Do I need to use mending plates?


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Old 02-26-2012, 03:10 PM  
RockyMtnBlue
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I will attach the two beams with two 1/2 bolts (a total of 4 bolts). Do I also need mending plates?


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Old 02-26-2012, 09:48 PM  
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No the bolts are plenty.
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Old 02-27-2012, 04:06 PM  
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Maybe a little construction adhesive if you have an open tube, on the ends of of the 2ply beams where they will meet. Will help keep the entire joint water tight. A few screws with the glue will eliminate the need for bolts
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Old 02-28-2012, 10:56 PM  
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Thanks... No mending plates and construction adhesive.
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Old 02-29-2012, 04:59 AM  
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Quote:
Originally Posted by siriuschaos View Post
Maybe a little construction adhesive if you have an open tube, on the ends of of the 2ply beams where they will meet. Will help keep the entire joint water tight. A few screws with the glue will eliminate the need for bolts
Sorry, but I would keep the bolts. Screws have no shear strength and can snap under load. I know it's easier, just no where near as good.
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Old 02-29-2012, 03:18 PM  
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Oh yes, did not mean to imply that I won't be using bolts.... Bolts and construction adhesive, no mending plates.
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Old 02-29-2012, 07:07 PM  
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Bolts will bring you up to minimum Code, as will post bases; http://www.awc.org/Publications/DCA/DCA6/DCA6-09.pdf Use some Grace I&W shield on the post bearing area, p.t. wood is not waterproof: http://www.greenbuildingadvisor.com/...-building-code

You need stand-off post bases for the capillary break they provide. Nails, not screws, for the sistering- as said. Use the I&W on the built-up beams top under the joists above for less water intrusion, or at least a bead of caulk- top only to drain below. Run a bead under the outside edge of the house ledger for a drip edge to stop water from working back to the house.

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Old 03-01-2012, 09:57 PM  
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Well-spoken, Gary. And if it were mine, there'd be a sistered PT vertical 2 x 4 on the back of every chopped up support post, extending below the break point. Just to minimize the damage when the little lady of the household smacks the deck with the garden tractor at full speed.
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Old 03-02-2012, 12:35 AM  
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Thanks for the feedback ... I'm learning something for every post. Question about my beams.. I'm attaching (sistering?) two 2x10s. The book says screws about 24" apart. From comments here, I gather that I should use construction adhesive and nails. I read that I should use 3 nails every 16". Comments?


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