jack1962 Posted June 11, 2021 Share Posted June 11, 2021 Has anyone used an equivalent fixing for sole plate to concrete slab, i was thinking of using Fischer Hammer Fixing A2 Stainless Steel - 8 x 100mm, any ideas? where do you find the sheer strengrh data? Link to comment Share on other sites More sharing options...
nod Posted June 11, 2021 Share Posted June 11, 2021 I’ve used plenty of Hilti Always great quality Plus reps will drop off also Link to comment Share on other sites More sharing options...
Conor Posted June 12, 2021 Share Posted June 12, 2021 (edited) I think you need A4 stainless for equivalent of 8.8 steel. I got rawlplug A4 stainless anchor bolts from Screwfix. Edited June 12, 2021 by Conor Link to comment Share on other sites More sharing options...
Onoff Posted June 12, 2021 Share Posted June 12, 2021 (edited) 1 hour ago, Conor said: I think you need A4 stainless for equivalent of 8.8 steel. I got rawlplug A4 stainless anchor bolts from Screwfix. Not quite afaic... "A4" relates to the corrosion resistance of the stainless steel. So A2 is nom 304 and A4 316 is 316 (better than 304). We've always referred to A4 as cutlery or marine grade. I recall a load of "ordinary", A2 stainless fixings used on a seafront job in Eastbourne. They had holes in them like a Swiss cheese after not too long! Atop a st/st bolt you'll see stampings for example "A4 70" or "A4 80". The 70 and 80 refer to the tensile strength, 80 being higher. Roughly 80 is equivalent, tensile strength wise to 8.8. We used to use a lot of M16 nyloc nuts on M16 A2/304 studs sticking out of concrete. They are notorious for locking up. (Nobody then ever used copper slip). One trick was to use A4 nyloc nuts on A2 studding. Used to lock up far less for some reason. As an aside, with mild steel bolts, no stamping means you can't tell the tensile strength grade. Working up the strength scale you get 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 10.9, 12.9 all fairly common. Above 8.8 they tend to be black and not zinc plated/galvanised as there can be problems with hydrogen embrittlement. Edited June 12, 2021 by Onoff 1 Link to comment Share on other sites More sharing options...
jack1962 Posted June 12, 2021 Author Share Posted June 12, 2021 Have just done a little more reading,, the Hilti are made from carbon steel and zinc coated, the shear strength is apparently greater than the stainless steel for same diameter of fixing Link to comment Share on other sites More sharing options...
Onoff Posted June 12, 2021 Share Posted June 12, 2021 2 minutes ago, jack1962 said: Have just done a little more reading,, the Hilti are made from carbon steel and zinc coated, the shear strength is apparently greater than the stainless steel for same diameter of fixing The Fischer data tables are available. Exactly what fixing type were you looking at? For example: LT_01_N_F_SEN_AIP_V2.pdf Link to comment Share on other sites More sharing options...
jack1962 Posted June 12, 2021 Author Share Posted June 12, 2021 31 minutes ago, Onoff said: The Fischer data tables are available. Exactly what fixing type were you looking at? For example: LT_01_N_F_SEN_AIP_V2.pdf 1.47 MB · 1 download the spec for build says Hilti and i was just wondering if there was a comparable alternative with the same spec, it is for fixing sole plate to concrete slab Link to comment Share on other sites More sharing options...
jack1962 Posted June 12, 2021 Author Share Posted June 12, 2021 1 minute ago, jack1962 said: the spec for build says Hilti and i was just wondering if there was a comparable alternative with the same spec, it is for fixing sole plate to concrete slab i see that the 8mm hole size fischer fixing A2 ,,from what i think i am reading right is 0.27kn...for the Hilti it appears for the 8mm hole size fixing it is 0.30kN Nrd & 0.50kN Vrd ...what does theNrd and Vrd mean,,any idea? Link to comment Share on other sites More sharing options...
jack1962 Posted June 12, 2021 Author Share Posted June 12, 2021 40 minutes ago, Onoff said: The Fischer data tables are available. Exactly what fixing type were you looking at? For example: LT_01_N_F_SEN_AIP_V2.pdf 1.47 MB · 1 download Hammer Fixings Link to comment Share on other sites More sharing options...
nod Posted June 12, 2021 Share Posted June 12, 2021 55 minutes ago, jack1962 said: Have just done a little more reading,, the Hilti are made from carbon steel and zinc coated, the shear strength is apparently greater than the stainless steel for same diameter of fixing Exactly You won’t find better than Hilti Link to comment Share on other sites More sharing options...
Onoff Posted June 12, 2021 Share Posted June 12, 2021 2 minutes ago, jack1962 said: i see that the 8mm hole size fischer fixing A2 ,,from what i think i am reading right is 0.27kn...for the Hilti it appears for the 8mm hole size fixing it is 0.30kN Nrd & 0.50kN Vrd ...what does theNrd and Vrd mean,,any idea? Tensile Nrd, shear Vrd Link to comment Share on other sites More sharing options...
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