Tarmac: Concrete Block

ESTIMATING GUIDE

The figures shown below are intended for "rule of thumb" use only:

Unit Quantities

2 1/2 High Block (2 1/4x8x16) 3.10 block per SF of wall area

Half High Block (4x4x16) 2.25 block per SF of wall area

Standard Block (4", 8", 10", 12") 1.125 block per SF of wall area

Face Brick Modular 7.0 brick per SF of wall area

Oversize Brick 6.0 brick per SF of wall area

Utility Brick 3.0 brick per SF of wall area

Mortar Quantities

Block 3 bags per 100 block

Face Brick Modular 7 bags per 1000 brick

Oversized Brick 8 bags per 1000 brick

Utility Brick 10 bags per 1000 brick

Sand Quantities

Sand 1 CY per 7 bags mortar

Horizontal Wall Reinforcing Quantities

Horizontal Wall Reinforcing SF/1.33

Cavity Fill Insulation Quantities

Cavity Fill Insulation 4 CF per bag

Approximate
Volume To Fill Core Voids In Block

6x8x16 2 core 0.17 CF/block

8x8x16 2 core 0.25 CF/block

10x8x16 2 core 0.33 CF/block

12x8x16 2 core 0.39 CF/block

Approximate
Quantities of Concrete Required To Fill Bond Beam Lintels (BBL)

6x8x16 BBL 0.173 CF concrete per LF

8x8x16 BBL 0.22 CF concrete per LF

8x8x16 DEEP BBL 0.46 CF concrete per LF

12x8x16 BBL 0.37 CF concrete per LF

12x8x16 DEEP BBL 0.74 CF concrete per LF

Typical Concrete
Masonry Unit Dimensions

Nominal Actual Unit Size Faceshell Thickness^(a) Web Thickness^(a)

Inch-Pound (in.) Metric (mm) Inch-Pound (in.) Metric (mm) Inch-Pound (in.) Metric (mm) Inch-Pound (in.) Metric (mm)

4x8x16 102x203x406 3 5/8 x 7 5/8 x 15 5/8 92x194x397 3/4 19 3/4 19

6x8x16 152x203x406 5 5/8 x 7 5/8 x 15 5/8 143x194x397 1 25 1 25

8x8x16 203x203x406 7 5/8 x 7 5/8 x 15 5/8 194x194x397 1 1/4 32 1 25

10x8x16 254x203x406 9 5/8 x 7 5/8 x 15 5/8 244x194x397 1 3/8 35 1 1/8 29

12x8x16 305x203x406 11 5/8 x 7 5/8 x 15 5/8 295x194x397 1 1/2 38 1 1/8 29

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