![]() ![]() The tolerance in the length of the units shall not be more than +/- 5 mm and maximum variation in height and width of the unit, not more than +/- 3mm. In addition to the blocks mentioned above, blocks shall be manufactured in half lengths of 200, 250, and 300 mm to correspond to the full-lengths. The nominal dimensions of the concrete blocks are given below: The concrete block -hollow (open or closed cavity) or solid shall be referred to by its nominal dimensions. They include stretcher, corner, double corner or pier, jamb, header, bullnose, and partition block, and concrete floor units. The concrete block units shall be made in sizes and shapes to fit different construction needs. Hollow and solid concrete blocks shall be sound and free from cracks, broken edges, honeycombing, and other defects that would interfere with the proper placing of block or impair the strength or performance during construction. They have durable material that holds up well in most climates also, a variety of textures, patterns, and colors can be achieved by combining different CMUs, which makes the concrete one of the most versatile products.Hollow and Solid Concrete Blocks 1. When the wall is installed, the reinforcement bar can still be placed within the core of the block to strengthen the structure, because of the concrete block design.Ĭomparatively, concrete blocks are relatively inexpensive their cost varies according to the type of block. Almost 50% of the block’s total volume has hollow cores, height and depth can be added in outdoor areas using a concrete block wall.
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