I have determined that I want two IPE 240 or HEA 200 to replace two glulam beams of 115x495. The length should be 7.8 meters. They will serve as ridge beams for a garage.
Now, as I am from Västergötland, it shouldn't cost anything.
What I have is a considerable amount of 100mm I-beams, 3.0 meters long, and welding skills. So I want to be able to construct my own truss that corresponds to the aforementioned.
How should I calculate to know what height the truss should be?
I have the impression that the beams should be spliced straight in this case, but do the webs also need to be reinforced?
Now, as I am from Västergötland, it shouldn't cost anything.
What I have is a considerable amount of 100mm I-beams, 3.0 meters long, and welding skills. So I want to be able to construct my own truss that corresponds to the aforementioned.How should I calculate to know what height the truss should be?
I have the impression that the beams should be spliced straight in this case, but do the webs also need to be reinforced?
This sounds exciting, can you provide a bit more information?
1. Why two beams? Are they supposed to work together or are they for two different ridge beams?
2. What other dimensions do you have for your 100mm beams, (flange width and thickness, web thickness).
3. Do you know what type of steel they are made of?
4. How are the glulam beams, IPE240 and HÈA200 dimensioned? Is there a calculation that can be followed?
1. Why two beams? Are they supposed to work together or are they for two different ridge beams?
2. What other dimensions do you have for your 100mm beams, (flange width and thickness, web thickness).
3. Do you know what type of steel they are made of?
4. How are the glulam beams, IPE240 and HÈA200 dimensioned? Is there a calculation that can be followed?
I have simply looked at the different dimensioning programs for glulam beams and want two load-bearing beams instead of a ridge beam. This is because I want, as a second step, to be able to attach a crossbeam transversely to the lower beams on the trusses. The crossbeam should preferably handle 150-200kg. I also avoid glulam as rafters. The garage will be 7.8 meters long with a span of 7.2. Roof pitch of 22-25 degrees.
From the glulam dimension, I then found a small guide on page 31 in this magazine: http://www.skogsindustrierna.org/MediaBinaryLoader.axd?MediaArchive_FileID=95fb1466-0568-4419-a766-855bf9a9f3a5&MediaArchive_ForceDownload=true
The exact calculation probably doesn't exist and is still a bit of a compromise for now. Above all, it's my thought process that should be commented on... But eventually, it must be concretized into a lot of scrap sitting in my future garage roof!!
From the glulam dimension, I then found a small guide on page 31 in this magazine: http://www.skogsindustrierna.org/MediaBinaryLoader.axd?MediaArchive_FileID=95fb1466-0568-4419-a766-855bf9a9f3a5&MediaArchive_ForceDownload=true
The exact calculation probably doesn't exist and is still a bit of a compromise for now. Above all, it's my thought process that should be commented on... But eventually, it must be concretized into a lot of scrap sitting in my future garage roof!!
Oh. What are the dimensions of your I-beams?
In the attached file, a conceptual proposal is shown for trusses that can be built from your old beams. Is this something you had in mind?
I can probably help you with that (when I have time), if you provide me with more precise details on factors affecting the construction.
I need to know the distance between the truss supports as accurately as possible.
Should the trusses be supported by steel columns? Do you have the support loads from your glulam calculations?
If you think I'm being inquisitive (you might be right), it's to avoid spending time on a construction that doesn't fit and having to redo the work. I don't want there to be any risk of misunderstandings.
I need to know the distance between the truss supports as accurately as possible.
Should the trusses be supported by steel columns? Do you have the support loads from your glulam calculations?
If you think I'm being inquisitive (you might be right), it's to avoid spending time on a construction that doesn't fit and having to redo the work. I don't want there to be any risk of misunderstandings.
I believe there are many questions.... There are so many that I barely know what I want myself....
The garage has exterior dimensions of 7.2x7.8 meters. I want to build the garage with autoclaved aerated concrete at 300 or 365. Currently, I'm leaning towards 365 mm. This makes the interior dimensions 6.47x7.07 meters (there should be some clearance). On one gable, the beams can be supported directly on the slab. The other side will have a sectional overhead door, so the beams must be angled to handle an opening of 4.8x2.4 meters.
I am attaching my laminated wood beam calculations where I believe most things should be clear. The safety factor I'm considering is based on a snow zone of 3.0 instead of 2.5, which my area Skövde claims to be. But recent winters seem to suggest otherwise....
I now have 2 options, 1 beam in the middle or two on the side. Load values, etc., should be outlined in the PDFs. The reason I want 2 beams is that I want to combine a transverse bridge beam between the two trusses and also be able to use construction timber as roof rafters. The downside is that these beams would bear a fairly large load that would otherwise go down the walls.
There are different support loads for the two solutions but the same size for the laminated wood beam. Double the price of the laminated wood beam, double the work on steel beams. Therefore, I am attaching an alternative with just one beam to simplify things a bit for myself. The bridge crane would then become a jib crane on one gable's column, which would then need to be dimensioned up. I want to be able to lift at least 180kg.
A third option for just the bridge crane would be to weld two longitudinal side beams with my I-beams solely for this purpose (without bearing any roof loads). This beam would also be used if the garage had ordinary truss roofs.
There are so many that I barely know what I want myself....The garage has exterior dimensions of 7.2x7.8 meters. I want to build the garage with autoclaved aerated concrete at 300 or 365. Currently, I'm leaning towards 365 mm. This makes the interior dimensions 6.47x7.07 meters (there should be some clearance). On one gable, the beams can be supported directly on the slab. The other side will have a sectional overhead door, so the beams must be angled to handle an opening of 4.8x2.4 meters.
I am attaching my laminated wood beam calculations where I believe most things should be clear. The safety factor I'm considering is based on a snow zone of 3.0 instead of 2.5, which my area Skövde claims to be. But recent winters seem to suggest otherwise....
I now have 2 options, 1 beam in the middle or two on the side. Load values, etc., should be outlined in the PDFs. The reason I want 2 beams is that I want to combine a transverse bridge beam between the two trusses and also be able to use construction timber as roof rafters. The downside is that these beams would bear a fairly large load that would otherwise go down the walls.
There are different support loads for the two solutions but the same size for the laminated wood beam. Double the price of the laminated wood beam, double the work on steel beams. Therefore, I am attaching an alternative with just one beam to simplify things a bit for myself. The bridge crane would then become a jib crane on one gable's column, which would then need to be dimensioned up. I want to be able to lift at least 180kg.
A third option for just the bridge crane would be to weld two longitudinal side beams with my I-beams solely for this purpose (without bearing any roof loads). This beam would also be used if the garage had ordinary truss roofs.
As a ridge beam, a truss according to the sketch below might work. Your I-beams have such a small dimension that several are needed in width to create a reasonable truss. Do you have 60-70 m of I100 or do you also need to include I80? Above the portal opening in the gable, you probably need another truss to transfer the support force of the ridge beam to the columns.
He he.... That's quite a beam. Feels like way too much. I had thought maybe 600 in height was okay, but having 3 in width was a bit more than I expected. Is it for stability or what's the weakness here? Indeed, it was the old/weak I-beam I had.
Thank you for taking the time. I've had time to ponder and I'm likely going with the solution of an A-truss with a raised bottom chord for my desired ceiling height. That way I'll have approved trusses which make me feel a bit more secure. More expensive but safer and simpler. The downside is a higher external roof height.
Thank you for taking the time. I've had time to ponder and I'm likely going with the solution of an A-truss with a raised bottom chord for my desired ceiling height. That way I'll have approved trusses which make me feel a bit more secure. More expensive but safer and simpler. The downside is a higher external roof height.