Hello
We are planning to build a staircase and have received a construction drawing for this. The support consists of an L steel (among other things) where two flat bars are to be welded that will be attached to a concrete wall. It is to be fastened with 4 M16 and chemical anchors on each side. How is this usually practically solved? It seems difficult to measure, weld, and get this in place with the correct measurements directly. Do people usually cut and weld on site or make it a bit too short (say one cm) and shim with steel plates?
The concrete is lime plastered and the plaster holds well. Does this need to be removed, or is it okay to attach directly to it?
Thank you and have a nice Friday
/Mattias
We are planning to build a staircase and have received a construction drawing for this. The support consists of an L steel (among other things) where two flat bars are to be welded that will be attached to a concrete wall. It is to be fastened with 4 M16 and chemical anchors on each side. How is this usually practically solved? It seems difficult to measure, weld, and get this in place with the correct measurements directly. Do people usually cut and weld on site or make it a bit too short (say one cm) and shim with steel plates?
The concrete is lime plastered and the plaster holds well. Does this need to be removed, or is it okay to attach directly to it?
Thank you and have a nice Friday
/Mattias
Construction veteran
· Norrland
· 342 posts
Hi! Will you be cutting and welding yourself or will a company handle that? It's easiest if you can get the right length directly, but it also works to make it a little shorter and then shim it. If you measure and cut a bracket of some sort to that measurement and see how it fits. Adjust so it's almost perfect, maybe a millimeter short. Then cut the L-steel to the same length and weld on the flat bar. Lift into place and bolt it down. It's convenient if you can first bolt down a bracket or make a "lathund" (if you don't want to unnecessarily drill holes in the wall) that it can rest on while you drill, inject, and press in the threaded rods. Is it thick plaster?
Thanks for the reply!
I won't be welding myself so it would have been nice if the beam was ready and fit directly. However, it feels very tricky. If the wall leans slightly outward, it will be difficult to get it up. The plaster is about 15mm
/Mattias
I won't be welding myself so it would have been nice if the beam was ready and fit directly. However, it feels very tricky. If the wall leans slightly outward, it will be difficult to get it up. The plaster is about 15mm
/Mattias
Construction veteran
· Norrland
· 342 posts
Okay, but they should be able to manufacture it to the millimeter. But go ahead and cut a piece of lumber and check if you think it's feasible to get it in place at the right dimensions, then go for it. Otherwise, just make it a couple of millimeters short and then ask the company manufacturing it to include a couple of 1mm shims. The best thing would be if you could get the beam against the concrete, but if the plaster is secure, it should work to leave it as it is. If you are manufacturing the beam to the exact length and the plaster is 15mm, you would need to remove quite a large surface to fit the beam.
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