Basically I have a 60 kg object with a width length of 2 meters, 900mm high, and about 150mm widthbasically a big square rectangular boxThis needs to be mounted on the wall, so what I was thinking is the best way of going about it, is using an L shape Aluminium angleI'm thinking of using the longest side of the L shape bend to mount on the wall itself, by drilling some holes through it, and dynabolting it to the masonry wallThen basically all I would do is sit the box on top of this angle, and using just a few more dynabolts to keep the object upright against the wall in each cornerOptions of aluminium thickness for the L Shape are 3mm(6060 T5, NOM MASS VALUE: 9.054) or 6mm(6061 T6 NOM MAS VALUE: 16.482)Is this the best way to mount this object, and also which one of these angles is strong enough to hold the object without the channel bending or deforming, downwards.