Best way to secure a Steel Plate to a Concrete Floor ?

[self builder 123]

Hi

I am planning to secure a flat 12mm thick galvanised mild steel plate ( 3000mm long x 170mm wide ) to the concrete floor in my garage.

The edge of the roller door will stop on this plate so it needs to be secured with countersunk screws so that the top face is flush.

The plate will form a threshold at the main door to the garage.

The plate has yet to be manufactured.

Could anyone please recommend how many fixings I should use to secure the plate to the floor ? I planned to space 2 rows out along the length at 0.5m centres.

How far in from the edge would you recommend the fixing holes are drilled in the plate ?

Which size of fixings would you recommend were used ?

In the concrete floor I was thinking about using internal threaded anchors. Could anyone recommend a particular type ?

Any advice would be much appreciated.

Cheers.

 

[PrenticeBoyofDerry]

Have you thought of using raw bolts? as well as becoming a threshold does the the plate serve any other purpose?
The final fixing's should be close to the ends, about 15/20mm

 

[self builder 123]

Hi

I was thinking about using the drop in anchors for concrete, but I was wonder which size to use. As the plate is just to be a threshold plate I was wondering just how deep the fixings would need to be ?

 

[meadowhog]

10mm Fischer Anchor FH II and probably only 6 required, 8 if your concerned about it lifting somewhere.

 

[self builder 123]

Hi

Cheers

Is this a drop in anchor type ?

 

[meadowhog]

If you mean the bolt is the same size as the hole in the plate, then yes. A lot easier than rawl bolts.

 

[self builder 123]

Yes from what I can see you drill the hole in the concrete, drop the anchor in. You then use a setting tool together with a hammer to expand the bottom of the anchor which secures it in place. Job done !

 

[meadowhog]

Er not sure, I'd just place the plate on floor, drill through the holes into the concrete, tap in the bolts and tighten with an allen key

 

[Static]

The expanding bolt option would suit your needs, the FH range is a high performance one and if its just for holding down a plate you could use a cheaper countersunk bolt.. phone them and chat through your needs..

Bear in mind thou that the hole in the plate varies depending on the bolt manufacturer.. ie a 8mm Fischer Anchor FH II-SK bolt needs a 12mm dia hole.

Also might wanna consider how deep yous concrete is, as bolts are set lengths and need to be into decent concrete to fix.. ie the same 8mm FH bolt above needs a minimum of 125mm thick concrete (110 or so with your 12mm plate)..