Best way to fix baseplate to concrete

Qaz

New Member
Looking for some advice. Putting up a small roofed area 4m X 4m with 8ft high RSJ. Wondering what's thes easiest way to bolt them to concrete floor. Was thinking of using thunderbolt like

Wondering are they strong enough or would rawl bolts/anchor bolts be better
 

br jones

Member
Looking for some advice. Putting up a small roofed area 4m X 4m with 8ft high RSJ. Wondering what's thes easiest way to bolt them to concrete floor. Was thinking of using thunderbolt like

Wondering are they strong enough or would rawl bolts/anchor bolts be better
chemical anchors
 

Bury the Trash

Member
Mixed Farmer
Looking for some advice. Putting up a small roofed area 4m X 4m with 8ft high RSJ. Wondering what's thes easiest way to bolt them to concrete floor. Was thinking of using thunderbolt like

Wondering are they strong enough or would rawl bolts/anchor bolts be better
yes, as said above resin fixing gives a more precise and predictablly accurate positioning ime.
variations on this make are good, external being important i guess.
and for structural rsj like you mention something like this size of ..
or
https://www.screwfix.com/p/rawlplug-studs-bzp-m12-x-160mm-10-pack/3806f
just then need the right sized drill bit .
other suppliers are available ...
 

dave mountain

Member
Livestock Farmer
1 tube but get 2 to be safe. use HDG studs not BZP. or if you are tight like me buy a 3m length of HDG threaded rod and cut to length. drill size is 2mm larger than whatever threaded rod you are using. make sure to galv spray the ends of the rods.
 

dave mountain

Member
Livestock Farmer

Bury the Trash

Member
Mixed Farmer
one tube of the 360 ml carton will be enough, just get a few extra nozzles as it can go off quick, with that in mind get prepared for 4 of holes at a time in order to not be panicking if youve got help lift the rsj on to the 4 bolts before they go hard as then there s a bit of movement iyswim, that is thye big difference to thunder blots , with them there no movement either way ,they have to be spoton drilled etc.

remember if using threaded bar , after cutting it, grind or file off the burrs and thread on and off a few times nut as a practice run, as it might be easier to do that then rather than after its in situ.
 

Qaz

New Member
Thanks for all the feedback. Would a week be long enough to leave concrete to cure before drilling and using chemical anchor
 

blackisleboy

Member
Livestock Farmer
If you are pouring new concrete, why not just incorporate the fixings into it using a jig to get bolt spacings correct. You then just lower the uprights onto the bolts and screw them down with the nuts......

 

Bury the Trash

Member
Mixed Farmer
If you are pouring new concrete, why not just incorporate the fixings into it using a jig to get bolt spacings correct. You then just lower the uprights onto the bolts and screw them down with the nuts......

that would be the best professional way yes ideal, youre right

but getting the positioning right is harder done like that and will be not so straight forward to lay the concrete ... if youre not experienced in practice than when the concrete is laid and line up the 2 stanchions on it in place move to fine tune to perfection iyswim .....then drill the concrete bolt holes through the steel holes in the perfect positions,pop in the bar and resin spot on....and it doesnt sound like its a big building
.....that is when done as a dIY type job.
 

dave mountain

Member
Livestock Farmer
Thanks for all the feedback. Would a week be long enough to leave concrete to cure before drilling and using chemical anchor
couple days would be enough, just dont do them up that tight. come back a few weeks later and tighten them right up properly
 

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