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View Full Version : I beam for attached car port


fg19537
Dec 6, 2008, 12:55 PM
I would like to build an attached car port to my house, but would like only 2 poles to support opposite the house. Could I use an I beam to support a 25 to 30 foot length? (with tar shingle roof).

Thank you

KBC
Dec 6, 2008, 03:34 PM
What is the rafter alignment,is the gable resting in the beam or the rafter ends?Is this a lean-to type roof?(shed)

And what purpose are the 2 posts?Instead of a stud wall?

Back to you.

fg19537
Dec 7, 2008, 12:05 PM
What is the rafter alignment,is the gable resting in the beam or the rafter ends?Is this a lean-to type roof?(shed)

And what purpose are the 2 posts?Instead of a stud wall?

Back to you.

Lean to off the side of a ranch style house. I imagine a beam lag bolted high on the side of the house, rafters pitching down to the I beam. I am trying to eliminate the need for a lot of posts because I am going to have to plow snow between the posts.

Thank you for your response.

KBC
Dec 7, 2008, 12:30 PM
OK,thank you for the added info.

If you are concerned about snow removal,are you prepared for the expense of an engineered beam(pre-lam),or something similar?

How much does the open spacing mean to you?

A third post,or forth for that matter,would make it a lot more cost effective,and you could do it with standard 2X lumber,rather than expensive pre-lams or an I-beam.

Maybe a solution you can accept?

fg19537
Dec 7, 2008, 12:53 PM
OK,thank you for the added info.

If you are concerned about snow removal,are you prepared for the expense of an engineered beam(pre-lam),or something similar?

How much does the open spacing mean to you?

A third post,or forth for that matter,would make it a lot more cost effective,and you could do it with standard 2X lumber,rather than expensive pre-lams or an I-beam.

Maybe a solution you can accept?

It would depend on the cost of the I beam. Are we talking $1000, $2000? The way you are answering makes me think you think it can be done. Do you think the I beam could take
The weight between 2 post?

Thank you

KBC
Dec 7, 2008, 01:16 PM
While I am not a structural engineer,I can say,an I-beam(not knowing specific size) would do any length you require.

Bridges and spans of this sort are suspended for upwards of 200' with I-beams,those are very large beams!

The deflection on this span may or may not be a problem,but the cost might be prohibitive.

If you could put additional posts in,I believe you would save a considerable amount of money and effort(Ever tried to lift 30' of I-beam?)

If you are sure this is what you want,I suggest contacting a metal supplier(posts should be metal and be able to withstand the I-beam weight in combination with the decking/shingles)

And contact your local building inspector for code requirements.Plus a structural engineer for specifics on this project.

Sorry,not an easy solution.