Concrete Block Concrete Retaining Wall Footing Design

A poured concrete footing for concrete block or brick walls should be at least twice as wide as the planned wall.
Concrete block concrete retaining wall footing design. Concrete strengths less than this will reduce the design life of the blocks. The stem of the l should extend straight up from the middle of the footing. Despite the many references a single volume on retaining wall design for the professional practitioner and civil engineering student could not be found. Concrete strength al ൯ne for an 10 thick wall with 5 10 and 2 5 clear to strength steel will only reduce the nominal moment capacity of the secti對on from 136 68 to 135 66 inch kips 尩 if the concrete strength decreased from 3 5 to 3 0 ksi.
Foundation all concrete block walls must rest on a sturdy foundation of poured concrete. Decorative liners wall landscape concrete block molds decorative liners for rataining walls or landscaping. Straight radius corners caps and decorative liners. The concrete design mix is normally 35 to 50kn mm2 in strength and there is no steel reinforcement in the blocks.
The footing dimensions will largely be determined by the size of the wall. Build the footing and insert rebar into the wet concrete at intervals corresponding to the cores in the blocks. There is no need for a heavy foundation. 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.
The blocks need to be laid on firm ground on 100mm of concrete to give the wall a level and flat foundation. Concrete block unit placement in retaining wall concrete block units should be installed properly in accordance with design documents and need to be plumbed. Lay out the wall and excavate the slope and the footing trench. The footing should be at least as thick vertically as the wall s planned width.
Numerous textbooks and technical papers on soil mechanics foundation engineering concrete design masonry design and in all sorts of related topics. Prepare the footing spread mortar and build leads sliding the block over the rebar as needed. Masonry retaining walls are built with a reinforced concrete base as an anchor and a wall of hollow concrete blocks reinforced with 12mm steel bars. If you want a superstrong concrete block foundation you need to include both horizontal steel reinforcing wire and in the cores vertical reinforcing steel that extends up from the concrete.