I will attach an inner bearer 45 x 170 for a deck to an old house foundation in hard concrete. I plan to use ESSVE pin screw expanders Golden Anchor (hot-dip galvanized) for the attachment. I would appreciate tips on suitable dimensions for the bolt (is M10 x 134 sufficient?) and appropriate center-to-center distance along the bearer (is 400 mm enough?). No abnormally high loads will be near the house. Other bearers will be placed on closely spaced (about 1.5 m) pillars.
If you read the spec for hot-dip galvanized M10 (https://www.essve.com/sv/produkter/...er-golden-anchor/golden-anchor-varmforzinkad/), you can see that depending on the mounting depth, each screw can handle 500-800 kg before it fails. This should mean that you can increase the c/c distance depending on how much load there will be on the beam. You need to look at how the dead weight and intended load on the deck will be, and then use screws accordingly. I guess that not many screws are required to hold (depending on the quality of the concrete...) without the deflection of the beam being the limiting factor. I myself mounted my beam for the deck in hollow bricks with 8mm screws and plugs at c/c 600 mm and it is solid.
Yes, you are probably guessing right. The deck's own weight is negligible in this context (about 30 kg per meter along the carrier beam, if I include all the timber halfway out to the other carrier beam). The maximum load on this area (1.0 x 0.65 m closest to the house wall) is unlikely to exceed 200 kg. If I attach a 45 mm beam with an 81 mm drilling depth (61 mm effective fixing depth), an M10/134 expansion bolt can handle about 725 kg of shear force (according to ESSVE's datasheet). So 600 mm or even 1000 mm between the bolts should be more than sufficient.
I have also used facade plugs (10/140) for another project, but that was in brick and ESSVE recommends expansion bolts or concrete screws for concrete. The only downside of the expansion bolt might be that it's difficult to remove once it's in the wall.
Thanks for your response.
I have also used facade plugs (10/140) for another project, but that was in brick and ESSVE recommends expansion bolts or concrete screws for concrete. The only downside of the expansion bolt might be that it's difficult to remove once it's in the wall.
Thanks for your response.
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