Heavy Duty Fixing To Wall - Recommendations?

[Spuggy]

Hi All,

I Have to fix a 6m length of 225x75mm timber to wall (with timber - timber hangers), as a plate to carry a large, heavy floor.

The wall is 100mm concrete block (terolene finish - it used to be external wall).

I was thinking of threaded bar and resin fixing due to thickness of timber, but thought I'd pick the brains on here first in case anyone knew of anything better?

Cheers, Paul.

 

[chappers]

thats the way to go 10mm bar and polyester chemfix resin bolted every 600mm

 

[jeds]

I don't know what you mean by 'heavy' but either way I wouldn't advise guessing at it. Best to calculate the total load of the floor and use a proprietory fixing with a known capacity. Divide the load by the number of fixings to give you the spacing. i.e. if the load is 4kN/m and the capacity of the bolts is 2.8kN then you need bolts at 2.8/4 = 0.7metres. Chemfix is better than expanding bolts.

Allow a safety factor of about 1.4 in the load calcs.