Hello!
My construction of a storage/garage/carport continues. The slab plus most of the masonry is done, and I need to start thinking about obtaining a suitable steel beam that will support the intermediate floor above the garage, i.e., the floor between the garage and the attic space above. The building will be 14 m long and 9 m wide (external dimensions), with storage at one end and a carport at the other, and the garage in between. As for the storage and carport, we probably have solutions for the support (including partition walls). What I would like help with here is calculating the dimension of a steel beam over the garage section. The plan is to place, for example, a HEA or HEB in the middle (i.e., parallel to the long sides).
Thus, the beam will be placed with its center 4.5 m into the building. Beams/planks in dimension 45 x 220 mm are then placed on edge between the outer wall and the steel beam. The free span of the steel beam will be 5.60 m, and the total length including support surfaces will be approximately an additional 24 cm, as it will rest on KKR posts (or VKR, I don't remember) that are 120 x 120 mm.
The outer roof will be supported by a glulam beam up at the ridge, so the only load on the steel beam will be the weight of the intermediate floor + the weight of what will be stored up there on the "attic." No dramatically heavy things, but I naturally want to store some items there, the heaviest single item might be the cement mixer and similar, as well as some timber, etc. If one were to specify a maximum weight on the floor, I might say about 2 tons spread over the entire area. A fair portion of that load will thus be on the outer walls.
Anyone who can and is willing to calculate how strong a steel beam I need?
/Micc
My construction of a storage/garage/carport continues. The slab plus most of the masonry is done, and I need to start thinking about obtaining a suitable steel beam that will support the intermediate floor above the garage, i.e., the floor between the garage and the attic space above. The building will be 14 m long and 9 m wide (external dimensions), with storage at one end and a carport at the other, and the garage in between. As for the storage and carport, we probably have solutions for the support (including partition walls). What I would like help with here is calculating the dimension of a steel beam over the garage section. The plan is to place, for example, a HEA or HEB in the middle (i.e., parallel to the long sides).
Thus, the beam will be placed with its center 4.5 m into the building. Beams/planks in dimension 45 x 220 mm are then placed on edge between the outer wall and the steel beam. The free span of the steel beam will be 5.60 m, and the total length including support surfaces will be approximately an additional 24 cm, as it will rest on KKR posts (or VKR, I don't remember) that are 120 x 120 mm.
The outer roof will be supported by a glulam beam up at the ridge, so the only load on the steel beam will be the weight of the intermediate floor + the weight of what will be stored up there on the "attic." No dramatically heavy things, but I naturally want to store some items there, the heaviest single item might be the cement mixer and similar, as well as some timber, etc. If one were to specify a maximum weight on the floor, I might say about 2 tons spread over the entire area. A fair portion of that load will thus be on the outer walls.
Anyone who can and is willing to calculate how strong a steel beam I need?
/Micc
If I interpret your information correctly, it concerns an area of about 50 sqm. The beam dimensions entirely depend on the loft's load and how it is distributed. The usual standard for storage floors is 0.5 kN/sqm (about 50 kg/sqm), for which a HEA 160 is sufficient. The alternative is a regular intermediate floor with 2 kN/sqm. In that case, you need to go up to HEA 220. Then there are in-between options.
Hello! Thanks a lot for your response! Yes, that's correct, it's about 50 sqm. And by a "normal intermediate floor," does one mean a floor where the space above is, for example, a residence or similar, like an office or so??? That will never be the case here. But 50 kg/sqm is roughly what I can see can be supported there. Then, of course, it might happen that the load in the attic is not perfectly distributed over the entire area... How serious is it if 700 kg ends up placed almost directly over the middle of the beam? (even though it shouldn't be so if you use your head...).
I can get hold of an HEA 200 at a reasonable price, haven't seen it, but the seller mentioned there are some relatively large holes drilled or cut (up to 50 mm in diameter). If they are in the "wrong" place, that likely means the beam is considerably weakened, right? Less serious if they're in the middle of the web I suppose. I can also get a hold of a HEB 240, but that really is a bit overkill... It weighs about 485 kg, so you'd have to put in some effort to set it up
. Jokes aside, it's also doable with various chain hoists.
I can get hold of an HEA 200 at a reasonable price, haven't seen it, but the seller mentioned there are some relatively large holes drilled or cut (up to 50 mm in diameter). If they are in the "wrong" place, that likely means the beam is considerably weakened, right? Less serious if they're in the middle of the web I suppose. I can also get a hold of a HEB 240, but that really is a bit overkill... It weighs about 485 kg, so you'd have to put in some effort to set it up
. Jokes aside, it's also doable with various chain hoists.Best answer
All the variants I have looked at can handle a point load in the middle of the beam of 700 kg. I think it seems like an HEA 200 is a good compromise, provided that the holes are in the web.