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. These include: the weight of the fixture, the
mounting plate, anchoring environment and the light cover fixture.
Weight of the Light 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 ahcor
is determined by its' diameter. The larger the diameter, the deeper the
Lighting Fixture Mounting Plate
Light fixtures come with a mounting plate that has holes it in
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 an 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.
Light Cover Fixture
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.
Fasteners Used for Fastening Light Fixtures to Brick
- Versatile fasteners that work well in brick base material
- Smallest diameter available- 1/4"
- Largest diameter available- 3/4"
- Available in regular zinc plating and stainless steel
- Can be used in the brick itself or the mortar joint (depending on where the mounting holes are located)
- Does not have a finished head
- Threaded part of the anchor may protrude into the light fixture cover
- Self tapping screw designed for use in brick, block or concrete
- Best known by the brand name Tapcon®
- Available in standard blue Climaseal® coating and stainless steel (also coated in Climaseal©)
- Taps threads into the brick
- Hole must be drilled into the brick before the screw is used to fasten the mounting plate
- Available diameters range from: 3/16" to 3/4"
- Most diameters are available in a hex washer head or a flat phillips countersunk head
- The hole to be drilled for the concrete screw should be smaller than the diameter of the screw
Hammer Drive Anchors
- Ideal for fastening light fixtures to brick because of its low profile head
- Has a mushroom head- larger surface under the head for excellent pull out strength
- Low profile avoids taking up extra space in the fixture cover
- Available in 1/4" diameter
- Should only be used for light and small lighting fixtures
- Diameter of the hole to be drilled will be equal to the diameter of the hammer drive anchor
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.
Article Written By:
Bob Carlisle, President of Concrete Fasteners
Concrete Fasteners, Inc. has over 40 years of experience selling concrete fasteners. We can ship out one box or a whole pallet of concrete anchors. Our products are of the highest quality... "your satisfaction is guaranteed". We ship all orders the same day the order is received.