Hi, I have received construction drawings for my build, and they want me to use a 10-meter-long HEA beam 240. Can someone answer how thick a glulam beam would need to be to compensate for this beam? Prefer working with wood more.
There are several options. It mainly depends on how high a beam you can consider. Here are some options: 90x585, 115x540, or 215x450. There are more possibilities if you are prepared to over-dimension.
How do you calculate this?
What options are available if I overdimension? I don't want a higher beam but wider is not a problem.
What options are available if I overdimension? I don't want a higher beam but wider is not a problem.
215x450 is both the widest and lowest glulam beam that you can use. There are also widths of 140, 165, and 190 mm available.
The calculation is basic strength of materials. One can compare beams of different materials and profiles by comparing their flexural rigidity, i.e., the product of the modulus of elasticity and the moment of inertia, usually abbreviated as EI.
The calculation is basic strength of materials. One can compare beams of different materials and profiles by comparing their flexural rigidity, i.e., the product of the modulus of elasticity and the moment of inertia, usually abbreviated as EI.
I is the flexural rigidity, b the width, and h the height of a rectangular beam according to the following formula:Fabyggvejby said:
I=bh^3/12
From the formula, you can see that the width will increase the flexural rigidity linearly.
The height increases the flexural rigidity cubically, so compensating for reduced height with width quickly becomes unrealistic.