Minimum Concrete Wall Thickness

Section 11 3 1 1 states that the minimum thickness shall be based on the shorter of either the unsupported wall height or length.

Minimum concrete wall thickness.

Design process includes proper assumption of structural element sizes and then check the suggested dimensions to make sure that it meets the requirements of the design. Thickness of non load bearing masonry walls. Concrete is typically applied at a thickness of 2 inches or more but the thicker it is the stronger the slab will be. When a taller wall or a higher level of soil or both come into play the thickness should increase to 10 inches.

Minimum thickness of concrete structural elements based on aci 318 14 irc 2009 is 456 2000 and ubc 1997 is presented. For more on designing bearing walls refer to chapter 11 of aci 318 19. 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. Thus it appears that in the example you provided the minimum wall thickness is 6 inches.

Four inches is most common for a slab. A 0 7752 inch minimum thickness multiplied by a 15 percent tolerance or 115 becomes 0 7752 x 1 15. In general poured concrete basement walls that are 8 feet tall or less and have no more than 7 feet of soil pressing against them from the outside function well at a thickness of 8 inches. This equals 0 89147 inches or almost 0 9 inch minimum pipe wall thickness.

If a safety factor of two was required the minimum thickness of 0 7752 x 2 would give a minimum wall thickness of 1 5504 inches. Nonetheless it is possible to use smaller thickness for parapet wall if it is reinforced to resist earthquakes. Inside diameter inches inches wall thickness class 1 class 2 class 3 4 6 8 1 10 1 1 12 1 1 1. Poured concrete foundation walls that are less than 8 feet tall and have soil outside that is 6 or 7 feet deep against the wall can often be 8 inches thick and function quite well.

While a minimum thickness of 150mm for a wall is possible 180 250mm is recommended to aid detailing and construction. Minimum thickness of concrete slab beam column foundation and other structural members is selected to meet the design requirements as per standard codes. Walls thinner than 250mm can incur concrete compaction problems due to the congestion of reinforcement particularly near openings. As soon as you go higher or have greater depths of soil pushing against the wall you need to increase the thickness to 10 inches.