Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 06-01-2009, 04:43 PM   #1
Newbie
 
Join Date: Jun 2009
Posts: 2
Rewards Points: 10
Default

Patio Roof Beam Span


I'm adding a patio roof off of the back of my house. It will run the length of the house (58'). I'm going to run a beam parallel with the house and span the rafters 10'-12'/24"oc off of the house and rest them on this beam. I'll have 6 posts with 2 - 12' spans, 2 - 9' spans, and a 16' span. All post will be 4x6 Doug. Fir except for the 2 on either side of the 16' span - they'll be 6x6 Doug. Fir. The roofing will be the metal roof and the pitch will be 2/12 with snow load possible in the winter.

Will a 5 1/8 x 9 GluLam beam be sufficient for the 16' span? And are the 4x6 Doug Fir posts sufficient for the load between the 12' spans?. If I went with a 1/12 pitch would I need to beef up the 16' beam?

Thanks is advance.

slakfu is offline   Reply With Quote
Old 06-01-2009, 07:00 PM   #2
BUILDER / REMODELING CONT
 
buletbob's Avatar
 
Join Date: May 2008
Location: LONG ISLAND N.Y
Posts: 1,543
Rewards Points: 1,000
Default

Patio Roof Beam Span


I personally think that the 16' span is to great for a 9-1/2 glue lamb. it wont snap but it will sag over time with a big snow load. I would go with three 1-3/4" x 9-1/2" LVL's with two 1/4" plates this would be good for a 40 psf live load and 15 psf dead load, 115% Snow. if my memory serves me right.
you will most likely need a permit for this and a set of plans, which will have all this spelled out for you.

buletbob is offline   Reply With Quote
Old 06-02-2009, 10:39 AM   #3
Newbie
 
Join Date: Jun 2009
Posts: 2
Rewards Points: 10
Default

Patio Roof Beam Span


Instead of that LVL setup could I still use glulam, but 5 1/8 x 10 1/2 instead? I've heard that glulam holds up better outdoors than LVL.
slakfu is offline   Reply With Quote
Old 06-02-2009, 03:58 PM   #4
BUILDER / REMODELING CONT
 
buletbob's Avatar
 
Join Date: May 2008
Location: LONG ISLAND N.Y
Posts: 1,543
Rewards Points: 1,000
Default

Patio Roof Beam Span


I would consult with a structural engineer. I was thinking it was going to be enclosed with koma board. as I have done in the past.
buletbob is offline   Reply With Quote
Old 06-03-2009, 10:45 PM   #5
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Rewards Points: 2,000
Default

Patio Roof Beam Span


It would help if you post where you are located
Snow loads vary
Scuba_Dave is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Flat roof questions, advice, ballpark estimate JerryH Roofing/Siding 18 11-07-2008 04:08 PM
Patio roof to house attachment question mikemobile Building & Construction 1 09-30-2008 07:51 AM
open span under hipped roof..... SickPuppy Carpentry 3 06-06-2008 11:24 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.