I have a cantilever bracket, fixed at one end, free at the other. One vertical element AB, 330mm long with a fixing at either end to a wall. One horizontal element CD, 375mm long. CD is fixed at 90deg to AB, 130mm from the top. A constant, downward load W=30kg, is applied to the end of CD, l=375mm. What is the force trying to pull the top fixing from the wall? Does the bottom fixing work as a pivot point making this a torque calculation? Assumptions: The strength of the bracket will well exceed the failure rate of the top fixing, so no flex in the 40mm box sections will occur. This bracket has been installed on a plaster board wall. The chemical fixings will take 9Kn but the plaster board will fail before this point, long before! Before a set up a chemical anchour in the mock up of the wall to test the fixing/ board to failure I would like to know at what point I exceed my working force of the bracket/ anchour interface??