The thickness of the wall they create.
Concrete block wall thickness.
The concrete block is designed so that when the wall or edifice is installed rebar can be placed within the core of the cinder block to reinforce the structure these hollow cores which come in sets of either two or three take up approximately 50 percent of the block s total volume.
However where lot size is small and or setback requirements are restrictive as is the case on zero lot line parcels exterior wall thickness can be a challenge.
The thickness or depth of concrete basement walls plays an integral role in their long term strength and durability.
Concrete block nominal vs actual dimensions concrete block cmu sizes.
They are identified by their depth i e.
The depth and size of the foundation will vary depending on the size of the concrete block wall and the weight it must support but a typical freestanding wall requires a foundation that is about twice as wide as the wall itself and which extends about 1 foot down below the frost line.
Standard specification for concrete facing brick astm c1634 15 astm international 2015.
Concrete foundation walls support the home standing above so any weakness can undermine the stability of the house.
The thickness of the wall with regard to its height is also extremely important.
For instance a 6 cmu is nominally 6 deep while a 10 cmu is nominally 10 deep.
Concrete block walls can be four inches thicker or more than conventional stick frame 2 6 exterior walls.
The result t ef is then added to the concrete masonry wall equivalent thickness t e and used in table 1 to determine the wall s fire resistance rating i e the equivalent thickness of concrete masonry assemblies t ea t e t ef.
For finishes on the fire exposed side of the wall a time from table 8 is assigned to the finish.
The appropriate depth of the wall depends on several factors and there is no single standard for every home.
Foundation all concrete block walls must rest on a sturdy foundation of poured concrete.
Design strength of the concrete concrete blocks and mortar are very important.
Concrete masonry units cmus are manufactured in a variety of sizes.
For the most part each type of wall has two categories reinforced and non reinforced.