Shelf Screws


Block Plaster

I realise that this is probably a very basic question but I'm not hugely experienced with DIY so I'd appreciate some help with it.

I want to put up a 1M book shelf using 2 x 25cm mitred brackets with 3 x 5mm screw holes down each length. The wall is brick with plaster on top and 15cm thick. The bracket designs go from a point at the ends to a wider point where the two lengths meet so the 3 holes are 1cm, 1.5cm and 2cm away from where it will meet the wall. I want to use this for fairly heavy books so I am looking at something like 60Kg maximum.

I was looking for advice about exactly which screws and wall plugs I need to buy to ensure it is a secure fit for a fairly heavy load?

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brown plugs 6.5mm masonery bit hammer action
drill the hole 50-55mm into the wall dependant on screw length
bracket depth+45mm gives you the screw length required
so if the frame is say 22mm then 22+45=67mm so 70mm screw
you could also use imperial no10x 2.5"or 2.75 screws[65mm-71mm]
Thanks big-all, that's really helpful. Should I use the same length screws all the way up as the bracket is further away from the wall at the top so I assume this will take the most load, or will some variant of 65-71mm be enough anyway (if I go for 71mm it should leave at least 50mm in the wall even on the furthest part of the bracket)?
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yes just remember the plug is around 40mm in length so aim for a screw to go in at least 36/37mm and work back from there

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