MASONRY FLEXIBLE ANCHORS
Masonry Flexible Anchors have been developed by Brunswick Sales to provide lateral stability to masonry walls designed to accommodate differential movements.
Differential movements in building structure may result from a number of factors:
Failure to design for any or all of the above movements can result in considerable structural damage that can be extremely costly and in some instances impracticable to repair.
Buildings that include masonry elements should be designed to accommodate differential movement.
The design procedure is relatively simple and Brunswick Sales make a full range of the necessary Masonry Flexible Anchors that will allow masonry structures to be able to cope with this.
Basic Design Factors
All masonry should be designed to accommodate for differential movement and movements that must be allowed for can be outlined as follows:
Movement in Masonry Walls
To allow for movements in masonry and that covers expansion, contraction and footing movement, control joints are required. These joints are usually referred to as “Expansion Joints”, “Control Joints” or “Articulation Joints”.
Vertical Control Joints
Vertical control joints are usually 15 - 20mm in width and are provided in masonry walls to accommodate for horizontal movements. They are not normally provided in base brickwork less than 600mm high or on the internal leaves of clay brick cavity walls of small buildings.
Horizontal Control Joints
When clay brickwork is used as cladding or for infill purposes, provision must be made to control the differential movement between the brickwork and the surrounding structure. Horizontal control joints are usually 10 – 15mm in width.
Structural requirements in Masonry Walls is usually achieved with the introduction and building in of Wall ties, designed to provide lateral stability and strength when used in correct building practice.
Differential movements in building structure may result from a number of factors:
- Permanent changes in the size of the masonry walls
- Shrinkage of the structure of reinforced concrete buildings
- Elastic deformation of load bearing members
- Cyclical thermal movements
Failure to design for any or all of the above movements can result in considerable structural damage that can be extremely costly and in some instances impracticable to repair.
Buildings that include masonry elements should be designed to accommodate differential movement.
The design procedure is relatively simple and Brunswick Sales make a full range of the necessary Masonry Flexible Anchors that will allow masonry structures to be able to cope with this.
Basic Design Factors
All masonry should be designed to accommodate for differential movement and movements that must be allowed for can be outlined as follows:
- Long term shrinkage of concrete brick and blocks and calcium silicate bricks (both vertically and horizontally)
- Long term expansion of clay bricks (both vertically and horizontally)
- Long term vertical shortening of load bearing frames and load bearing walls resulting from such factors as elastic shortening, creep shortening and in the case of reinforced concrete , drying shrinkage
- Long term horizontal shortening of reinforced concrete fames and floors form drying shrinkage
- Differential thermal movements. The outside cladding of a building is subjected to a greater range of temperature than the internal structure it shields and the effects of this must be considered at the time of design.
Movement in Masonry Walls
To allow for movements in masonry and that covers expansion, contraction and footing movement, control joints are required. These joints are usually referred to as “Expansion Joints”, “Control Joints” or “Articulation Joints”.
Vertical Control Joints
Vertical control joints are usually 15 - 20mm in width and are provided in masonry walls to accommodate for horizontal movements. They are not normally provided in base brickwork less than 600mm high or on the internal leaves of clay brick cavity walls of small buildings.
Horizontal Control Joints
When clay brickwork is used as cladding or for infill purposes, provision must be made to control the differential movement between the brickwork and the surrounding structure. Horizontal control joints are usually 10 – 15mm in width.
Structural requirements in Masonry Walls is usually achieved with the introduction and building in of Wall ties, designed to provide lateral stability and strength when used in correct building practice.
