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Old 04-14-2015, 02:47 PM   #1
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Beam Span for deck roof


I cannot seam to find a friendly guide on requirements.

I am building a pressure treated deck roof 16' (left to right) by 10' (from house towards yard).
Needs to hold 2 people (as well the joists,deck boards and metal roof) in case working on something on the roof.
The back part up against the house will have 3 columns.

My question is what is required for a beam for the 16' as I want no column in the middle at the front (bottom/trough) of the roof so that means just 2 columns 1 on each end.
They would be sitting on 6"X6" columns.

How many and what size (2X8, 2X10 or 2X12) do I need to go across together?

4 side by side means a 1/4 inch over hang on the 6X6's....or would 3 be best?

2X6's and 2X8's are the only ones at Home Depot that come 16'
Would prefer single pieces rather than bolting pieces.
or
The 6'X6's also come 16' too....1 or 2 of those maybe?


Thanks

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Old 04-14-2015, 05:32 PM   #2
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Just a poor idea to be looking for someone to design your deck for you on line anyplace.
Need someone (an engineer) to design this that knows what there doing and knows local codes.

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Old 04-14-2015, 05:41 PM   #3
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Telling us where you are located and what pitch the roof will have will help too. Also what do you plan to use for rafters?
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Old 04-14-2015, 05:44 PM   #4
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And for a 16' span you are looking at an LVL or some other engineered solution. A good lumber yard can get the size you need. Really this is like a 16' Garage door opening.
Make sure the post to beam connection is solid. Use the appropriate Simpson bracket or the like.
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Old 04-14-2015, 09:28 PM   #5
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There's a bunch of sites where you can find span tables. I think one is the American wood council
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Old 04-14-2015, 10:58 PM   #6
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Well I spent a lot of time on my second post only for this forum to log you out after so much time? and loose my post so I will keep this short this time.

mae-ling thanks for your time and scott for the suggestion on that site, looks friendly enough. Sometimes you just dont have the time to look and the first 2 I did see where not great.

joecaption.... no need for you to respond to any of my threads, thanks

I was just going to bolt 3 2X12's and be done with it but looking to expand my horizons and see what others are doing.

My roof (one of many as I am a retired roofer) is 90% engineered and just the beam question left aside from minor details. Since the deck roof will cover only half the deck which is 20' out from the house I have yet to come across the need to go with out a post in the middle.
This is a small deck roof, not the Taj Mahal.....I am not looking for codes or engineers lol.

To answer mae-ling:

Toronto
12/3 pitch
2X6 rafters at 16" centers
1X6 top
Aluminum roof 22 gauge
Black ornament style steel post brackets
3 skylights, 4' narrow basic ones

Think I will just stick with my 3 2X12's
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Old 04-14-2015, 11:05 PM   #7
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Want to make it super strong? Old farmers trick. Put some heavy gauge metal sheet in-between the 2x12's. Not sure of the numbers but the metal really adds to the strength and you can nail through it.
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Old 04-15-2015, 12:38 AM   #8
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Not sure I am understanding this correctly, but are you wanting an unsupported span the entire 16'? Why not just cut some 2X4 for under the deck for support? I will take photos of my deck tomorrow for ya, its built kinda the same way as what you are wanting(i think). Maybe It will help ya out.
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Old 04-15-2015, 06:09 AM   #9
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2 columns 1 at each end...the deck is 16 feet wide.

10X16 Roof covering half the 20X16 deck

No middle column at the 8 foot mark means a dining table half in the shade and half out.

Good farmers tip, thanks.
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Old 04-15-2015, 10:17 AM   #10
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Go here for good tables. Since you are in toronto, the potential snow load appears to take you out of the triple two bye twelve range and into glu-lam but since your roof span is less than the minimum roof span contained in the tables, you may make it with the triple.

That said, any real lumberyard will be able to size the thing for you AND provide the correct materials....just as any good lumberyard will be able to supply you with two bye twelves up to 20' long!

Ron
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Old 04-15-2015, 11:49 AM   #11
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Thanks ront02769, good to know but you forgot to post the link.

This is actually my own deck....I am going to use temp supports in winter as I did at my old house but with heating cables too this time.

Thanks
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Old 04-15-2015, 01:50 PM   #12
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http://www.southernpine.com/app/uploads/SS_1-6L.pdf

Copy and paste in browser
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Old 04-15-2015, 07:08 PM   #13
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Sorry it took me so long today. Been workin muh butt off lol.

Anyways, got photos of my deck. Lemme know if you want something like this, Mine however is not for a snow load as I live in hades armpit....also known as south texas.










Ignore the mess. Construction been going on & well...construction is messy XD
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Old 04-16-2015, 02:20 PM   #14
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Nice job......I get that Deliverance feeling somehow lol?.
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Old 04-16-2015, 07:53 PM   #15
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Quote:
Originally Posted by something1965 View Post
Nice job......I get that Deliverance feeling somehow lol?.
Is the roof pitched the wrong way, or is it just me?

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