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Old 02-18-2010, 12:01 AM   #1
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How thick of a header do I need?


I am building a patio and I have 18 feet between two posts. I plan on using a 6x10 header and am placing 2x6 rafters every 24" and using 1" ship lap and a flat shingle for a roof. Will I be OK with the 6X10 header?

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Old 02-18-2010, 12:24 AM   #2
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How thick of a header do I need?


Where are you?
What are your Snow/wind loads?
What does your Beam supplier say about the beam design?
Do you plan on using solid wood? or an LVL beam?
How long are the Rafters?
What roof pitch?

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Old 02-18-2010, 01:02 AM   #3
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How thick of a header do I need?


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Originally Posted by jlhaslip View Post
Where are you?
What are your Snow/wind loads?
What does your Beam supplier say about the beam design?
Do you plan on using solid wood? or an LVL beam?
How long are the Rafters?
What roof pitch?

I am in Los Angeles, Ca. 25 mph wind max. using solid wood beam, rafters are at 14' and have a 4" pitch.
Thanks,
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Old 02-18-2010, 01:57 AM   #4
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How thick of a header do I need?


A popular question these days, and, as noted by many above, hard to answer without knowing your local code. But that won't stop me!

1) Your lumber yard can tell you,

2) your engineer can tell you, and

3) I can pull #s out of ..... :

I think your rafters may be a little light, maybe 2x8s at 24"oc instead. Fool around with: http://www.awc.org/calculators/span/...rcalcstyle.asp

Then I thumb through http://www.awc.org/pdf/WSDD/TOC.pdf and that leads me to lean towards a 6x12, but I may be wrong, often am.

When I can't remember a thing about the WSDD book above, I review my primers at http://bct.nrc.umass.edu/index.php/p...ers-and-beams/ and http://bct.nrc.umass.edu/index.php/p...s-and-headers/, which is all just a good reminder why options 1 and 2 above are far better ways to go.

It really is very local. My calcs use something called a snow load, which seems inherently silly in LA.

Ridge Beam or Ridge Board? I assume ridge board, which expects a lot more of your beam in question. If it's all hanging off the house, then maybe your 6x10.

And, if you put enough detail into describing what you are doing, you might even get a bite from an actual engineer who sometimes posts to the forums!

Good luck,
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