About to tear down a load-bearing wall in the house. The house is a 1 ½ story built in '49. The load-bearing wall currently consists of a vertical plank wall, 50mm thick. The total width of the house is 8m, and the wall to be demolished is 4.7m long and is located in the middle of the house on the entrance floor. In the basement, there is a masonry wall in the same line as the demolition wall. According to the Swedish glulam sizing list, I should use a 4.7m with dimensions 90x410mm. This height feels a bit too much, and I am now considering using a steel beam instead, like HEA.
-Are there any equivalent lists or similar for sizing an HEA beam?
-Are there any good alternatives to beams, such as lightweight construction or similar, that have less construction height than glulam?
-Are square tubes normally used for posts, or is it okay to use wood?
I'm a bit skeptical about welding beams and posts together on site in the living room.
-Is glulam 90x410 overdimensioned, maybe a 90x315 beam would work?
-Are there any equivalent lists or similar for sizing an HEA beam?
-Are there any good alternatives to beams, such as lightweight construction or similar, that have less construction height than glulam?
-Are square tubes normally used for posts, or is it okay to use wood?
I'm a bit skeptical about welding beams and posts together on site in the living room.
-Is glulam 90x410 overdimensioned, maybe a 90x315 beam would work?
have you considered placing a glulam in the attic, above the beam structure and letting it hang in the beam? Then you completely avoid a visible beam.
It's okay to make deposits of wood, a couple of 45x5 or 45x120 forming a post becomes very sturdy.
I don't think 90x410 is over-dimensioned if I compare it with the beams I have here in the house for similar spans.
It's okay to make deposits of wood, a couple of 45x5 or 45x120 forming a post becomes very sturdy.
I don't think 90x410 is over-dimensioned if I compare it with the beams I have here in the house for similar spans.
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Unfortunately, there is an upstairs above.
The alternative is to break up the floor on the upstairs and cut the beams to then push up a glulam beam, but that complicates things a bit, so that is the last resort.
A beam with low construction height is perfectly fine, the question is just which one??
The alternative is to break up the floor on the upstairs and cut the beams to then push up a glulam beam, but that complicates things a bit, so that is the last resort.
A beam with low construction height is perfectly fine, the question is just which one??
If you search the forum, you'll find an old thread I created several years ago. There, discussions took place about beams in the lengths you're looking for. Some nice forum members also did some calculations. I don't remember the result anymore, but you should be able to find this thread (searched a bit now but unfortunately didn't find it). I THINK it was an HEA 240 being discussed, but you must check this.hebbe said:
If you googled, it was easy to find the right one:
http://www.byggahus.se/forum/byggmaterial-byggteknik/41757-balk-vilket-material.html
http://www.byggahus.se/forum/byggmaterial-byggteknik/41757-balk-vilket-material.html
Good thread with a lot of useful info.
An HEA seems to be the way to go.
I need to start calculating a bit but have difficulty estimating the loads affecting the beam aside from its own weight.
What are the guidelines? Is there a general load that can be used?
The house is 1 1/2 stories + basement. 10x8m.
Also considering how to attach the beam to the posts in a good way. Drill holes in the lower flange and then bolt? (Wooden posts).
An HEA seems to be the way to go.
I need to start calculating a bit but have difficulty estimating the loads affecting the beam aside from its own weight.
What are the guidelines? Is there a general load that can be used?
The house is 1 1/2 stories + basement. 10x8m.
Also considering how to attach the beam to the posts in a good way. Drill holes in the lower flange and then bolt? (Wooden posts).
Using Martinsson's glulam dimensioning program, the total load has been estimated at 2x27KN.
(1 ½ story villa 8x10m, beam with a span of 4.7m placed in the middle of the house.)
Deflection has been calculated using the formula (5*qL*L^3)/384*EI
For an IPE200 this would give a maximum deflection of: 1.6cm (Ix=1943cm4)
This corresponds to the same deflection that a 90x405 glulam beam would give.
Can one feel confident with an IPE200 or alternatively an IPE220?
These beams do have fairly good weight properties.
(1 ½ story villa 8x10m, beam with a span of 4.7m placed in the middle of the house.)
Deflection has been calculated using the formula (5*qL*L^3)/384*EI
For an IPE200 this would give a maximum deflection of: 1.6cm (Ix=1943cm4)
This corresponds to the same deflection that a 90x405 glulam beam would give.
Can one feel confident with an IPE200 or alternatively an IPE220?
These beams do have fairly good weight properties.