Guidance for spacing and location of control joints can be found in the national concrete masonry association ncma tek note 10 02c control joints for concrete masonry walls empirical method 2010.
Block wall expansion joints.
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.
As mentioned in the expansion joints discussion the design of control joint spacing and location is the responsibility of the designer.
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.
Our siteworx foam expansion joint filler is made from polyethylene foam which comes with low moisture properties.
Exterior vertical wall expansion joint selection guide emseal watertight fire rated sound proof insulating precompressed foam sealant expansion joints.
This allowed movement helps prevent distortion and cracking.
This is because of greater loads in the lower parts of the wall.
Based on the location of joint expansion joints are divided into following types.
In the concrete block construction the expansion joints are expressed as control joints.
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.
Movements joints are typically constructed and filled with low density expansion and movement joint.
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.
Foundation walls traditionally do not include con trol joints due to concerns with waterproofing the joint to withstand hydrostatic pressure.
To help match mortar the foam comes in white.
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.
The expansion joints are incorporated to endure the stresses.
Expansion control joints to control the expansion and protect the wall structure from cracking under pressure masons install vertical control joints at specific locations.
Control joints are often constructed to transfer lateral loads across the joint.
Types of expansion joint.
While these attributes are the primary basis for concrete masonry s.
2 for more information.
An expansion joint is simply a disconnection between segments of the same materials.
These joints will absorb the pressure created by the expansion by giving the masonry wall flexible space to expand.
