Need advice on which dimension of glulam beam is needed to support a floor structure with a free span of 7 meters
The floor structure is self-supporting, but I would like it to be a bit more rigid. The beam's free span will be 5 meters with support against an outer wall and an inner wall.
Is a 270x140 beam approved?
The floor structure is self-supporting, but I would like it to be a bit more rigid. The beam's free span will be 5 meters with support against an outer wall and an inner wall.
Is a 270x140 beam approved?
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If the total floor area supported by the intended beam is 35 sqm, has a normal residential usage (2 kN/sqm) and a normal self-weight (0.5 kN/sqm), then 140x270 is not sufficient to keep the deflection at an acceptable level. Instead, if you use 140x360, the deflection will be about 1/500 of the beam's span, which is acceptable in this context. If you want to reduce the height of the construction, you can instead use a 215x315.
The intermediate floor is dimensioned for the deflection that should be approved. So I shouldn't really need a beam. I just want it to be a bit stiffer for running and jumping (children's play) 
215x315 might be an option. Didn't think it had to be so hefty, but 5 meters is quite a distance.
215x315 might be an option. Didn't think it had to be so hefty, but 5 meters is quite a distance.
7 meters is a very large span for a wooden floor structure. Today's requirements (not just norms but generally accepted standards) are stricter when it comes to deflection in floor structures. To meet this, beams in the order of 4x14 inches are needed, which I don't think you have. When designing the new glulam beam, you must base it on the loads that actually exist.
Has hb beam 400 high (in beam masonite beams)
Unfortunately, it is far too weak. It has less than half the capacity of the glulam beams I have suggested.
Okay, there you go, someone calculated it after all. But now I'm going to put up a beam, so it should turn out well in the end. I'll see what dimension I can fit there without it causing problems. But I'm aiming for as sturdy as possible.
Now I at least have some idea of what's needed.
Thanks
Now I at least have some idea of what's needed.
Thanks
A small interjection just:
There is a difference between 5 meters and 7 meters because justus calculates to the power of 3... (5^3 = 125 while 7^3 = 343) I.e. the load becomes almost 3 times as large between 5 meters and 7 meters.
(I understood it as justus looking at a span of 7 meters now).
There is a difference between 5 meters and 7 meters because justus calculates to the power of 3... (5^3 = 125 while 7^3 = 343) I.e. the load becomes almost 3 times as large between 5 meters and 7 meters.
(I understood it as justus looking at a span of 7 meters now).
The span for the proposed support beam (glulam beam) is 5 meters and for the transverse existing beams 7 meters. I apologize if my presentation was a bit confusing.
The Masonit beam type HB 400 has an impressive capacity considering the small amount of material it contains, but here it is not sufficient. The moment of inertia is about half of what is required for a glulam beam, while the modulus of elasticity for the flanges corresponds to regular construction timber and the web (in masonite) much less.
The Masonit beam type HB 400 has an impressive capacity considering the small amount of material it contains, but here it is not sufficient. The moment of inertia is about half of what is required for a glulam beam, while the modulus of elasticity for the flanges corresponds to regular construction timber and the web (in masonite) much less.