Hello,
I'm going to rebuild the roof of a garage.
A low-pitch roof, about 7-10 degrees.
My plan is to use Glulam 90x225mm on 600mm centers, which will rest on an existing Glulam 415x115mm and then land on a steel beam that I plan to have over the garage door entrance.
The roof will then be covered with raw wood planking and felt, and after that, decking will be laid on top to be used as a terrace. The snow load zone is 1.5.
I wonder what type of beam and posts I need to support the weight.
Grateful for your reply!
I'm going to rebuild the roof of a garage.
A low-pitch roof, about 7-10 degrees.
My plan is to use Glulam 90x225mm on 600mm centers, which will rest on an existing Glulam 415x115mm and then land on a steel beam that I plan to have over the garage door entrance.
The roof will then be covered with raw wood planking and felt, and after that, decking will be laid on top to be used as a terrace. The snow load zone is 1.5.
I wonder what type of beam and posts I need to support the weight.
Grateful for your reply!
Member
· Västernorrland
· 12 009 posts
There is probably missing information about how the wall will be where the gate is supposed to be? Will it be a six-meter span without any post at all or?
Yes, exactly. It's going to be a double garage door + a door there, so there will be no posts.S Stefan1972 said:
Member
· Västernorrland
· 12 009 posts
A fixed door and gate should probably be attached to something?
If you're going to use the roof as a terrace, it must be dimensioned like a balcony, resulting in a fairly high imposed load. A steel beam needs to be of the type HEA 220 or IPE 260. Glulam 90x225 on c/c 600 is too weak, it needs to be at least 90x270. Even the existing glulam beam, 115x415, is too weak and needs reinforcement. A gird on the middle will also significantly reduce costs. Similarly, reevaluating the use as a terrace and its size.
Can I run HEA220 next to the existing glulam beam?
So that I have one steel beam at each end of the 5000mm span to land the glulam beam on?
And reduce to 400cc on glulam 90x225?
So that I have one steel beam at each end of the 5000mm span to land the glulam beam on?
And reduce to 400cc on glulam 90x225?
They are connected together as a package that is attached to the outer walls.S Stefan1972 said:
Installing the Börjlina in the middle is unfortunately difficult as the garage door needs to move freely under the ceiling and I have limited height.
Yes. In terms of load, 90x225 works on c/c 400, but it will be a bit wobbly. You can counteract that by replacing the subfloor with screw-glued K-plywood, preferably 24 mm. Alternatively, you can screw-glue K-plywood on the underside instead.KaptenCederberg said:
Sounds like a good plan to screw/glue on the inside when I get an "internal ceiling." Do you also know what size/type of steel frames are needed to support the beams?
Many thanks for the response.
Many thanks for the response.
"Steel posts" of course I mean
It simplifies assembly if the posts have the same width as the beam. If done this way, they will be heavily over-dimensioned, but it will look nicer. The easiest way is to use the beam's dimension for the posts as well. Otherwise, glulam also works well, 90x90 mm.
just to double-check, Steel beam HEA or HEB 220 in the outer wall above the garage door.
Then Glulam 90x225mm at 400cc resting on this beam.
I am also reinforcing the existing glulam beam 115x415mm with a post in the middle (glulam 115+115).
For posts under the Steel beam, I wish to have them as sleek as possible, what type of steel post should be used for this? Is the square one "hollow" or what is best? And what are they called?
thanks in advance
Then Glulam 90x225mm at 400cc resting on this beam.
I am also reinforcing the existing glulam beam 115x415mm with a post in the middle (glulam 115+115).
For posts under the Steel beam, I wish to have them as sleek as possible, what type of steel post should be used for this? Is the square one "hollow" or what is best? And what are they called?
thanks in advance
Steel columns can withstand very large loads, even with small dimensions. Square hollow sections are called VKR. Theoretically, 50x50 mm VKR sections would suffice, but it doesn't make a good design detail with an HEA 220 resting on top. Therefore, the column dimensions must be considerably exaggerated. The largest VKR dimension is 120x120, I believe. It requires quite a bit of mechanical work to assemble it in a neat and durable way.
brilliant @justusandersson
Thank you very much for the response.
I will do most of it myself, but realize that I need to call a Smed to come and weld/assemble the steel structure for me
One last question to feel confident in the choice of beam:
I plan to choose an HEB 220 beam instead of an HEA 220 to be on the safe side.
Is there a big difference in how much weight they can carry before they "bend"
Advantages / disadvantages?
Very grateful for your answers
Thank you very much for the response.
I will do most of it myself, but realize that I need to call a Smed to come and weld/assemble the steel structure for me
One last question to feel confident in the choice of beam:
I plan to choose an HEB 220 beam instead of an HEA 220 to be on the safe side.
Is there a big difference in how much weight they can carry before they "bend"
Advantages / disadvantages?
Very grateful for your answers