Sometimes a light fixture needs to be fastened to a brick wall in an indoor or outdoor application. There are three basic considerations that need to be taken into account before attempting to fasten a lighting fixture to brick. the weight of the fixture, the mounting plate, anchoring environment and the light cover fixture.
The holding values of fasteners used in brick are determined by the diameter of the anchor. An increase in the light fixture's weight will create a proportionate increase in the anchor's required diameter and depth of embedment into the brick. The minimum embedment of an anchor is determined by its' diameter. The larger the diameter, the deeper the minimum embedment.
Light fixtures come with a mounting plate that has holes that allow mounting to the brick. The holes in the mounting plate will range from 1/4" diameter to 5/8" diameter or larger. The diameter of the hole in the plate will not allow the same diameter fastener to be inserted into it. The threaded end of the brick fastener will fit through these holes, the working end will not. For example, if the holes in the mounting plate is 1/2" then a 3/8" diameter anchor should be used. It is important to choose a concrete anchor that is one size smaller than the holes in the mounting plate.
When fastening a light fixture outdoors, it is necessary to use a stainless steel brick fastener. Zinc plated brick fasteners should only be used when fastening a light fixture in a dry, indoor application. Zinc plated fasteners will rust over time in a moist, outdoor environment. Stainless steel brick anchors will not rust.
The amount of space inside the light fixture cover will sometimes be the determining factor for the type of fastener that will be required for a certain application. Some fasteners are designed with a finished head and will not take up much space in the fixture cover. Other brick fasteners, especially larger diameters, make take up space in the cover once they are set. Most heavy or larger light fixtures are designed to allow for larger diameter fasteners to be used. This is an important consideration to be determined prior to choosing the brick fastener to be used.
When your application requires that you attach/fasten a lighting fixture to brick, it is necessary to take all of these factors into consideration before deciding which fastener will work the best. Using the most ideal and suited fastener will ensure that these lighting fixtures are correctly and safely attached to the brick base material.
As with any anchoring project, it is important to keep safety in mind and follow instructions carefully. Always remember to wear safety goggles, handle all tools with extra care and follow all technical specifications. This article is meant to serve only as a basic explanation of concrete fasteners. Always refer to manufacturer's instructions or consult a contracting expert during any anchoring project.