| FBX |  |
NFP |  |
| Face Brick Extra | Non-Facing Plastered | ||
| Face bricks that are selected or produced for the durability and high degree of uniformity of size, shape and colour. | Clay Bricks that are suitable for general building work that is to be plastered. | ||
| FBS |  |
NFX |  |
| Face Brick Starndard | Non-Facing Extra | ||
| Clay Bricks that are selected or produced for their durability and uniformity of size and shape. | Clay Bricks suitable for use plastered or un-plastered. For general building works below damp proof course or under damp conditions or below ground level, where durability rather than aesthetics is the criterion for selection. | ||
| FBA |  |
E |  |
| Face Brick Aesthetic | Engeneering Units | ||
| Clay bricks that are selected or produced for their durability and aesthetic effect deriving from non-uniformity of size, shape or colour | Any class masonry unit produced for structural or load-bearing purposes in face or non-face work, where the manufacturer supplies clay bricks to an agreed comprehensive strength. | ||
| PA |  |
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Clay Pavers
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| Clay Pavers that are selected or produced for their durability and for a high degree of uniformity in size and shape and have dimensions such that the ratio of work size length to work size width is approximately 1:1; 2:1 or 3:1 | |||