Hello,
We are remodeling the kitchen and planning to open up a load-bearing wall.
The structural engineer has suggested a glulam beam, but we would rather have a steel beam. The papers/drawing we received only state that an "HEA beam with equivalent load-bearing capacity can be used." How do we convert this to a beam, is it possible?
Below is the information I can read from the documents we received. What more information is needed, or can someone give an opinion based on the information below?
Glulam beam 140x270mm
4400mm long
Opening should be 4200 minus post at one end, so perhaps around 4100 total.
Live load 150 kp/m2
Self-weight 50 kp/m2
Load span on beam 3400mm and 3600mm
Total width of the house 8500mm
I have written the same things in my other thread, but since it's in the kitchen section of the forum, I thought I might get some hits here too.
I should add that I haven't talked to the carpenter about this yet, but I want to check here first.
Link to the other thread:
https://www.byggahus.se/forum/threads/loepande-hjaelp-vid-koeksrenovering.440079/page-3
Have a nice evening!
We are remodeling the kitchen and planning to open up a load-bearing wall.
The structural engineer has suggested a glulam beam, but we would rather have a steel beam. The papers/drawing we received only state that an "HEA beam with equivalent load-bearing capacity can be used." How do we convert this to a beam, is it possible?
Below is the information I can read from the documents we received. What more information is needed, or can someone give an opinion based on the information below?
Glulam beam 140x270mm
4400mm long
Opening should be 4200 minus post at one end, so perhaps around 4100 total.
Live load 150 kp/m2
Self-weight 50 kp/m2
Load span on beam 3400mm and 3600mm
Total width of the house 8500mm
I have written the same things in my other thread, but since it's in the kitchen section of the forum, I thought I might get some hits here too.
I should add that I haven't talked to the carpenter about this yet, but I want to check here first.
Link to the other thread:
https://www.byggahus.se/forum/threads/loepande-hjaelp-vid-koeksrenovering.440079/page-3
Have a nice evening!
HEA 160 is on the safe side.
Thank you so much for the response!J justusandersson said:
A carpenter who has been here and just looked at the wall said 140, but he hasn't reviewed any documentation at all.
The neighbor who did something similar but with a 60cm narrower opening has a 150 beam, measured yesterday, so your assumption sounds reasonable to me.
Are there tables, or have you calculated this?
A beam with the same flexural rigidity is what can replace the glulam beam. Since it is the beam's deflection that is dimensioning, in terms of strength they are in all normal cases over-dimensioned.
Data on bending resistance should be available from respective suppliers.
Data on bending resistance should be available from respective suppliers.
HEA 140 is close but on the wrong side. A HEA 160 is 152 mm high. There are no tables, you compare the bending stiffness, which is the product of moment of inertia and modulus of elasticity. For steel beams, there are tables with moments of inertia; for glued laminated timber with rectangular cross-sections, you calculate it easily.
Which E-modulus do you calculate with for glulam? Thinking especially when no strength class is mentioned, is there a "standard class"?J justusandersson said:
10500 MPa corresponds to the characteristic modulus of elasticity for L40c (non-homogeneous beam), which I consider as the standard class for beams that are +180 mm high. For deflection calculations, you can use 13000 MPa. Homogeneous glue-laminated timber, L40s (beams that can be split), is slightly higher.