Hello, I've started a little project opening up an external ground floor wall to put a window in. The house is 1930s so got them dense heavy bricks, it's a cavity wall so need to open up both skins, the opening I've made is 850mm wide and I've used a 1200mm prestressed reinforced concrete lintel from b&q which gives me the suggested 150mm end bearings. However, since getting the lintel in I'm now question if I've used the right lintel to deal with the weight of the wall above. Any advice, guidance or suggestions would be very much appreciated as I'm freaking myself out a bit now that I should have used a bigger lintel or an RSJ.
Hi vwbrian, Go upstairs and look at the floor - you may need to pull back floor covering. the direction of your floorboards will be at 90 degrees to your joists. If you have a boarded floor look for the line of fixings which will be along the joists. Joists are a point loading so you do not want one directly above your new opening, PCC lintels are not designed for this application. Add to this the age of your property which could mean that your brickwork is laid with a weaker mortar so normal arch support does not apply. Regards S
Sorry Stoneboy, wasn't being impatient, the first of the last two posts wasn't showing when I posted the second one. I've checked and the floor boards are running 90degrees to the wall so guessing my joists must run parallel to the wall with the lintel. Anything else I should consider?
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