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Old 07-31-2012, 07:03 PM   #1
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Roof without posts


I am trying to figure out to build a carport without posts for approx 1/4 of the area. The structure would be 16" X 46". Open front, 46' wall with posts, 16' rear wall with posts and 26' of last wall with posts, leaving 20' of one wall and 16' front open - free of posts. I can hold the corner up to counteract snow weight but I cannot figure out how to prevent wind from raising the roof in high wind conditions. Any ideas?

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Old 07-31-2012, 07:25 PM   #2
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Roof without posts


Draw a sketch---I am picturing one very expensive iron and steel structure---

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Old 07-31-2012, 07:42 PM   #3
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I believe you may be right. I will have a sketch tomorrow. Thank you.

Last edited by abrown123; 07-31-2012 at 07:53 PM.
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Old 07-31-2012, 07:42 PM   #4
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I believe you may be right.....sigh. I will have a sketch tomorrow. Thank you.
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Old 08-01-2012, 01:03 PM   #5
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Roof without posts


Front and back are no problem with truss rafters, we have done 60' open.
The sides where the rafters land becomes the issue. 20' open I believe.
As your rafters will only span 16' that helps as it is not a large span.

What is your snow load? Where are you located?
Do you need permits?
How high are the walls (posts)?

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Old 08-01-2012, 06:42 PM   #6
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Roof without posts


The pitch of the roof is 3' in the centre (8' per side) so the snow load shoud be OK under normal conditions - with posts. I am located in Southwestern Ontario. Permits are not an issue as it is still classed as a carport as the front is not closed therefore not a garage. Wall height is 8 or 9'. Still in planning stage. Does this help?
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Old 08-04-2012, 11:44 PM   #7
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I have attached a very poor sketch. I will have a proper draft next week. Thank you for your input
Attached Files
File Type: pdf carport.pdf (94.3 KB, 42 views)
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Old 08-05-2012, 11:08 AM   #8
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You want no post in the front corner?
That would take some massive beams and engineering.
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Old 08-06-2012, 12:12 AM   #9
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Yes, no post in the front corner. A short ~45 deg brace on the property line side of the 16' side and a longer one along the 20' side are still an option as long as a high vehicle can pass under and also park with minimal obstructions. I have been looking at Pagodo style roof & truss structure in hopes there may be a solution there as the rectangle and gable roof is not an absolute. Not sure if there may be an answer there.

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Old 08-06-2012, 11:04 AM   #10
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You would either need angle supports back to the posts, which would not allow a vehicle under.
Or one massssssive beam cantilevered over the one wall.

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