A masonry expansion joint is a complete break in the masonry wall to allow for the entire structure to move under loading temperature related expansion contraction etc.
Block wall expansion joints.
As mentioned in the expansion joints discussion the design of control joint spacing and location is the responsibility of the designer.
This is because of greater loads in the lower parts of the wall.
The siteworx foam expansion joint filler.
The purpose of a masonry control joint is to allow free movement while maintaining the weathertightness of the construction.
Exterior vertical wall expansion joint selection guide emseal watertight fire rated sound proof insulating precompressed foam sealant expansion joints.
High walls tend to experience greater movement towards the top of the wall than in the lower extremities.
See tek 10 3 control joints for concrete masonry walls alternative engineered method ref.
Control joints as the reinforcement effectively reduces the width of shrinkage cracks.
These joints will absorb the pressure created by the expansion by giving the masonry wall flexible space to expand.
This is the perfect filling for expansion joints in brickwork and blockwork as it expands and contracts with the movement through a building.
This allowed movement helps prevent distortion and cracking.
An expansion joint is simply a disconnection between segments of the same materials.
Based on the location of joint expansion joints are divided into following types.
Control joints are often constructed to transfer lateral loads across the joint.
To help match mortar the foam comes in white.
Expansion control joints to control the expansion and protect the wall structure from cracking under pressure masons install vertical control joints at specific locations.
Movements joints are typically constructed and filled with low density expansion and movement joint.
Our siteworx foam expansion joint filler is made from polyethylene foam which comes with low moisture properties.
In the concrete block construction the expansion joints are expressed as control joints.
Foundation walls traditionally do not include con trol joints due to concerns with waterproofing the joint to withstand hydrostatic pressure.
2 for more information.
Like control joints expansion joints should be provided near corners in the masonry near returns or changes in the planes of the masonry wall at an y significant changes in the wall s height or stiffness at changed in foundations and at regular intervals along.
Types of expansion joint.
While these attributes are the primary basis for concrete masonry s.
An information series from the national authority on concrete masonry technology ncma tek 10 2c 1 control joints for concrete masonry walls empirical method introduction concrete masonry is a popular construction material because its inherent attributes satisfy the diverse needs of both exterior and interior walls.
