I am going to build a deck floor. I'm planning to attach a beam 45*145 to the base of the house. The base consists of L-elements, with a cement-based board on the outside, and behind that 50mm styrofoam.
What type of expansion bolt or similar can I use?
bengan6
What type of expansion bolt or similar can I use?
bengan6
Hello
You need to go into the slab for this.
Long expansion bolts work well, or long nylon plugs from e.g. essve http://www.essve.com/templates/EframePage.aspx?id=3535 search for 304 318
but you need to be aware of any electrical, water, or underfloor heating pipes that run there.
Also, the correct length so it grips in at least 50mm of concrete.
You need to go into the slab for this.
Long expansion bolts work well, or long nylon plugs from e.g. essve http://www.essve.com/templates/EframePage.aspx?id=3535 search for 304 318
but you need to be aware of any electrical, water, or underfloor heating pipes that run there.
Also, the correct length so it grips in at least 50mm of concrete.
Hello
Thank you for the response. Is there no risk that the part of the bolt that is in the styrofoam bends downwards, since the styrofoam does not have any supporting function? Meaning that the entire beam may sink, and consequently the entire floor.
Thank you for the response. Is there no risk that the part of the bolt that is in the styrofoam bends downwards, since the styrofoam does not have any supporting function? Meaning that the entire beam may sink, and consequently the entire floor.
Yes, the risk is quite high, somewhat depending on the choice of bolt diameter and center-to-center distance and load. Puncturing the polystyrene also means that you weaken the waterproof layer that the polystyrene also functions as. The function of bolting to the wall is mostly to prevent it from sliding away from the wall/house. Place a plinth quite close to the house, and there should be no problems; if you place it close enough, you can skip bolting to the wall.
Hi
Had exactly the same problem when we built our terrace. We did not attach the inner support beam to the wall but placed it only on concrete slabs. The remaining two support beams were anchored with posts. (moved the inner one slightly closer to the house) Worked great for seven years ...
//Mikae
Had exactly the same problem when we built our terrace. We did not attach the inner support beam to the wall but placed it only on concrete slabs. The remaining two support beams were anchored with posts. (moved the inner one slightly closer to the house) Worked great for seven years ...
//Mikae
Diversearbetare
· Göteborg
· 10 704 posts
Wouldn't it be easiest to cut out styrofoam + concrete with a diamond blade, cast a ledge against the base plate for each attachment point with expanding concrete, and then drill through everything?
Deleted.
//KoW
//KoW
I set cc 80 cm. Do not do as btgarb wrote: Drill 16 mm holes, use 16 mm threaded rod and chemical anchor. It doesn't work. Use 12 mm threaded rod and anchor resin. I also glued with PL400 on the backside of the support beam.
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