Contents. Common Masonry Units. PART A:CHAPTER 3 Common Masonry Units COMMON MASONRY UNITS NATIONAL METRIC CODING

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1 PART A Chapter 3 Common Masonry Units This chapter describes the most common masonry units and the coding system commonly used to describe and specify them. Contents 3.1 COMMON MASONRY UNITS 3.2 NATIONAL METRIC CODING 3.3 CATALOGUE OF MASONRY UNITS

2 3.1 COMMON MASONRY UNITS Concrete masonry units, for use in walls, fall into two broad categories concrete bricks and hollow concrete blocks. Other concrete units such as concrete segmental pavers, retaining-wall blocks and landscaping units are also produced, but are not dealt with in any detail in this manual. Concrete bricks are usually 76 mm high x 23 mm long x 11 mm wide, the same shape as the more traditional clay bricks. They are commonly produced on end in concrete block machines that have a mould cavity at least 23 mm high. Such bricks may include a frog or depression along the length of the brick, which assists laying and bond, or may be solid. Bricks which are produced on edge or on the flat in paver machines or smaller block machines will not include a frog. The advantages of hollow concrete blockwork over brickwork are: The larger units lead to more-economical construction The large cores enable hollow concrete blockwork to be grouted and reinforced to resist lateral wind, earthquake, fire and earth loads, with strength capacities approaching those of comparable insitu concrete. Concrete blocks are usually: 9, 119, 162 or 19 mm high 9, 19, 29 or 39 mm long 9, 11, 14, 19 or 29 mm wide, (thickness of masonry leaf ). The longer units usually have two (sometimes one, sometimes three) cores extending vertically through the block. Because the cores are slightly tapered, the blocks are manufactured upside down in the machine and, when laid in the wall, provide an enlarged area on which to place the mortar. Many other shapes known as fittings and fractions are produced for corners, openings, sills, bond beams, retaining walls and landscaping applications.

3 NATIONAL METRIC CODING Key to Prefix Numbers W ng th th id Height The Concrete Masonry Association of Australia has established a national metric coding for all units manufactured by its members. This accounts for approximately 9% of all concrete masonry manufactured within Australia. The coding system standardises the dimensional descriptions of masonry units. This allows a designer to specify any unit by number and to be certain that it can be identified correctly anywhere within this country. Le 3.2 CODE NUMBER Prefix identifies nominal wall thickness (2 mm) 2.1 (for example) Suffix identifies unit type and configuration (19-mm high, hollow, full length) Block Width (mm) Number Note: With the exception of 5 and 75, the prefix numbers are derived by adding 1 mm for the mortar joint width to the unit width and dividing by 1. Figure 3.1 Coding System Key to Suffix Numbers Block Length Block height Block Full (mm) type (39 mm) Hollow Solid* Hollow Solid* (29 mm) 1 2 (19 mm) 1 4 (9 mm) * Some manufacturers use an alternative method of designating solid units.

4 CATALOGUE OF MASONRY UNITS INDEX OF UNITS 1 Series 12 Series Series 2 Series 3 Series Screen Blocks 9 mm thick walls 11 mm thick walls 14 mm thick walls 19 mm thick walls 29 mm thick walls Decorative walls BLOCK.1 BLOCK Notes: 1 Segmental pavers and retaining-wall units are not included in this catalogue. 2 The suffix (NC) indicates units that are not as common as the others and are not produced in all parts of Australia. It would be prudent for a designer to check the availability with the suppliers before specifying these units. 3 The dimensions shown are the external dimensions of the masonry unit, which makes allowance for the mortar joints. 25 The following pages include diagrams of most of the concrete masonry units produced in Australia BLOCK 3.1 BLOCK Figure 3.2 Typical Dimensions of Cores These dimensions will vary from manufacturer to manufacturer

5 1 SERIES 9 mm thick walls PLAIN FACE FULL HEIGHT (NC) Hollow control joint (NC) Hollow control joint half (NC) Hollow universal 1.4 Hollow quarter 1.25 Hollow corner return 1.31 Solid full length 2.12 Lintel Block (NC) Hollow 45 squint PLAIN FACE HALF HEIGHT 1.83 Solid full length 1.71 (NC) 1.73 (NC) SPLIT FACE RANGE 1.11 Solid full height 1. Solid three quarter height 1.19 Solid half height Solid capping NC indicates units which are not as common as others and it would be prudent to check with manufacturer before specifying them. For Fire Rated Blocks refer to company test data and test results.

6 12 SERIES 11 mm thick walls PLAIN FACE FULL HEIGHT 12.1 (NC) 12.2 (NC) 12.3 (NC) (NC) Hollow universal (NC) Hollow 45 squint (NC) Hollow corner return BRICKS AND MODULAR BLOCKS 12.7 Standard brick Split face brick STANDARD Hollow double brick height BREAKAWAY Hollow double brick height NC indicates units which are not as common as others and it would be prudent to check with manufacturer before specifying them. For Fire Rated Blocks refer to company test data and test results.

7 SERIES 14 mm thick walls PLAIN FACE FULL HEIGHT /.81 Channel.9 (NC) Hollow control joint.3.4 Hollow quarter (NC).45 (NC).48 (NC) Lintel Half lintel.2 Knock-out bond beam Thick wall.1 (NC) Hollow control joint half.22 (NC) Hollow seven-eighths closure.25 (NC) Hollow corner return Clean-out stretcher H block.739 (NC) Hollow 45 squint PLAIN FACE HALF HEIGHT.71 (NC).73 (NC) NC indicates units which are not as common as others and it would be prudent to check with manufacturer before specifying them. For Fire Rated Blocks refer to company test data and test results.

8 2 SERIES 19 mm thick walls PLAIN FACE FULL HEIGHT Knock-out bond beam 2.9 (NC) Hollow control joint (NC) Bullnose full length Three-quarter lintel 2.1 (NC) Hollow control joint half 2.7 (NC) Bullnose half Hollow quarter Channel 2.21 (NC) Knock-out bond beam corner (NC) Hollow 45 squint H block 2.23 (NC) Jamb full length 2.12 Lintel 2.6 Bonded pier 2.24 (NC) Jamb half Half lintel Deep lintel 2.91 Double U retaining wall block capping tile Pier 2.56 (NC) Pilaster 2.57 (NC) Pilaster with control joint (NC) Single core full length Page 1 of 2 NC indicates units which are not as common as others and it would be prudent to check with manufacturer before specifying them. For Fire Rated Blocks refer to company test data and test results.

9 2 SERIES 19 mm thick walls PLAIN FACE HALF HEIGHT 2.38 Sill block 2.71 (NC) 2.72 (NC) 2.73 (NC) 2.74 (NC) Hollow quarter SPLIT FACE RANGE (NC) (NC) (NC) (NC) Three-quarter lintel (NC) height 2.12 (NC) Knock-out bond beam (NC) Corner (NC) Channel Page 2 of 2 NC indicates units which are not as common as others and it would be prudent to check with manufacturer before specifying them. For Fire Rated Blocks refer to company test data and test results.

10 3 SERIES 29 mm thick walls PLAIN FACE HALF HEIGHT H block Double 'U' retaining wall block Hollow quarter (Same as 1.2) 3.18 Deep lintel Single core full length NC indicates units which are not as common as others and it would be prudent to check with manufacturer before specifying them

11 SCREEN BLOCKS Decorative walls [various thicknesses] 1.95 (NC) 1.98 (NC) (NC) (9 mm) (NC).934 (14 mm) (NC) (9 mm) (NC).935 (14 mm) (NC) (9 mm) (NC).936 (14 mm) (NC) (9 mm) (NC).938 (14 mm) (NC) (9 mm) (NC).939 (14 mm) (NC) 1.94 (9 mm) (NC).94 (14 mm) (NC).745 (NC) Louvre block (NC) NC indicates units which are not as common as others and it would be prudent to check with manufacturer before specifying them