Hi there, A simple question (I hope!): What diameter blade do I require on my angle grinder to cut large enough slits in brickwork to install joist hangers? I'm retrofitting joist hangers to a Victorian house so I have to cut into the existing brick to allow the top lip of the joist hanger to insert into the brickwork. The joist hangers are 200x50mm.
A standard 115mm blade will do you, Jacko, as you only need to let the hanger in 55mm approx. If you're fitting the hangers into a mortar joint, then a Swiss Army knife will do...... Lucia.
Lucia - what rot! You are going to need a 9 inch grinder to get the depth. Or - bolt a joist to the wall and use timber to timber hangers off that. I prefer this way - less messy, easier to get the floor flat and often prefered by BCOs.
Lucy dear, stick to the muppett's section. You know it makes sense. 115mm indeed! In your dreams perhaps.......
Definitely 9" and if you are using the Simpson Strongtie JHM type Hangers you will have to still cut about 1/2" off the hanger tang or go to a 12" grinder. Bolt on types are another solution, easier to fix with Screwbolts (Thunderbolts) or Concrete screws (Tapcon anchors).
The O/P said that he's using 200x50mm hangers. The tang on <u>that</u> size is 52mm, so a 115mm disc will easily cut to that depth. I have no idea how he'll establish levels doing it that way - but <u>that's up to him.</u> Personally I'd prefer to bolt a level plate to the wall to take the joist hangers... However, the O/P asked a "a simple question (I hope)", so I have given him a direct answer. There's no need for a 9" or 12" cutter for a depth of 52mm. I reserve the right to post on Builders' Talk, because it's the natural and nearest choice for my present particular trade or calling - the fact that I spend most of my time on the sparks' forum is a matter for me and a clearly a matter for you twits to speculate about. I've answered the O/P, and he seems content - bless him... So the rest of you can piss orf and stop trying to teach your granny how to suck eggs...... Lucia.
Two days! you must have been losing sleep thinking about it, sorry Lucia your wrong, the gordon's doing the talkin. x
Lucia - a 115mm disc will not cut 52mm! If you halve 115 (you obviously only cut with one side of the disc) you get 57.5mm. Now the nut holding the disc is 40mm - halve that you get 20mm. Take 20 from 57 and you get 37mm. So if you have a brand new disc and perfect access to the cut - you can cut 37mm - which is some way off 52mm!
Thank you for explaining it to me, becks dear. So, the Swiss Army knife it'll have to be, then....... A Merry Christmas to all my readers, and Pffftttt! Lucia x
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