I'm planning to demolish a load-bearing basement wall and have been told it should be replaceable with 2 HEA 100 beams side by side. The floor structure (wood 45x220 joists) is supported on top of the load-bearing wall which is 20 cm thick. The wall to be removed is 3.9 meters long - see attached drawing - the wall to be removed is marked in red. Does it seem correct as calculated that it works with 2 HEA 100? Grateful for any input I can get!
Spontaneously, without having calculated it, I think that double HEA100 will bend down a bit over such a long span as 3.9m. Now, I don’t know what loads are involved, if it’s "just" an intermediate floor, it might work since the span is limited to 5m. But there can probably be some deflection in the floor.
This can only be answered by someone who has calculated the entire situation and the load is unknown.
The choice of dimensions, 2 HEA 100, might be because it should not be too conspicuous and should fit well with the rest of the fixed construction as well as attachment possibilities without taking up unnecessary space in the opening.
It is possible to go up in size and use an HEB instead, but then the clearance height in the opening is decreased.
Why do you doubt the answer you received? The person who gave you the answer has likely calculated it?
It is possible to use 2 HEB 100 instead, which would add 4mm more (HEB is 100 while HEA is 96) and increase the strength, but the answer you received must surely come from someone who has calculated it.
It is also possible to use HEM 100 (however, it is not 100 but 120x106) and it is more durable, and 1 HEM 100 is more durable than 2 HEA or 2 HEB.
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