How to choose different masonary wall thickness

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How to choose different masonary wall thickness


 How to choose different masonry wall thickness Thickness of masonry walls in a building is designed based on loads and other factors. Various requirements for suitable thickness of masonry walls are discussed. Requirement for Thickness of Masonry Walls in Buildings There are various requirements regarding the thickness of masonry walls that needs to be considered at the design stage. For example, it is recommended to use constant masonry wall thickness between lateral supports. The lateral support for masonry is provided by cross walls, pilasters, and structural frame members Masonry wall thickness changes between floor and roof and between different floors is usually enforced to reach thermal, sound and fire requirements.

Thickness Requirements for Load Bearing Masonry Wall

The thickness of load bearing masonry wall should be at least 304.8 mm (1 ft.) thick for maximum wall height of 10.668m (35 ft.). Moreover, the thickness of masonry wall need to be increased by 101.6 mm (4in.) for each successive 10.668m (35 ft.) height or fractions of this height measured from the top of the masonry wall.

Residential Masonry Wall

The thickness of bearing masonry wall of in residential building with maximum three storeys can be assumed to be 203.2mm (8 inch). This thickness should not be employed if the building is higher than three storeys, or the height of the wall exceeds 10.668m (35 ft.), or the wall subjected to lateral forces. Additionally, the wall thickness can be decreased to 152.4mm (6 in.) for one storey building if the maximum wall height is 2.74m (9 ft.). Masonry Wall of Penthouses and Roof Structures The thickness of bearing wall masonry with a height of 3.65m (12 ft.) above roof level or penthouses can be assumed to be 203.2mm (8 inch). Plain Concrete and Grouted Brick Masonry Wall It is possible to adopt 152mm (6 ft.) thickness of plain concrete and grouted brick masonry wall.

Hollow Masonry Wall

It is advised to restrict the height of cavity or bonded hollow masonry wall to a maximum of 10.668m (35 ft.).
Added to that, the height of cavity wall should not be greater than 7.62m (25 ft.) above the support if its thickness is equal to 254mm (10 inch).
Thickness Requirements of Rubble Stone Walls
The thickness of stone wall should not be smaller 406mm (16 in.) in any case.

Thickness of Non-Load Bearing Masonry Walls

The minimum thickness of parapet wall can be assumed to be 203mm (8 inch) and its height should not be larger than three times the wall thickness.
Nonetheless, it is possible to use smaller thickness for parapet wall if it is reinforced to resist earthquakes.
Regarding thickness requirements of exterior nonbearing masonry wall, the same specifications provided by ACI 530-11 for bearing masonry wall should be used which is 152mm (6 inch) for single storey building and 203mm (8 inch) for more than one storey building.









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