Brick Wall Expansion Joint

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.

Brick wall expansion joint.

For copings and cappings which may be prone to greater movement further provision of joints should be considered. Brick veneer vertical control joint purpose. With respect to horizontal expansion joints for vertical movement the outer leaf should be supported at. Expansion control joints to control the expansion and protect the wall structure from cracking under pressure masons install vertical control joints at specific locations.

In modern masonry cavity walls these two different masonry wythes are connected with flexible connections so control joints in the cmu back up wall can be. While these attributes are the primary basis for concrete masonry s. Determine the spacing of expansion joints by considering the amount of expected wall movement the size of the expansion joint and the. Accommodate these movements with a series of expansion joints.

The purpose of a masonry control joint is to allow free movement while maintaining the weathertightness of the construction. These joints will absorb the pressure created by the expansion by giving the masonry wall flexible space to expand. Review each structure for the extent of movements expected. For unrestrained masonry such as parapets and free standing walls vertical joint spacing should be reduced to 5 6m centres.

Typically most expansion occurs within 6 months but as the process is irreversible this movement needs to be accommodated by using movement joint fillers or expansion joint foams. So if you have 12 metres between joints then the joint should be 16mm 12m 4 30 16mm. Control joints in brick veneer are particularly important for large and complex commercial buildings because they tend to have larger wall panels and stiffer structures. 85 durometer hardness conforming to astm d2000 2 aa 805 astm d2240.

A brick veneer control joint is a continuous gap in the cladding system that al lows expansion and contraction of the adjacent. Rubber control joints allow for expansion and contraction of masonry walls while reducing the possibility of air and water penetration. Available in standard colors. Of expansion joints can be applicable to all structures.

In the past when cmu and brick walls were constructed as bonded composite walls control joints and expansion joints needed to be coordinated and aligned through both the block and brick. Thermal expansion can cause the bricks walls to creep and warp especially during dry cold weather. 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.