m a b c d e g h f I FIGURE H.11 - HEADWALL TYPE 3B (STONE MASONRY HEADWALLS) 900 B MASONRY) 600 0.40 0.30 1.49 0.60 0.20 0.40 0.10 0.69 0.40 0.80 0.40 0.26 0.58 0.14 TYPE (STONE 450 0.40 0.30 1.34 0.60 0.20 0.40 0.10 0.69 0.40 0.65 0.40 0.24 0.50 0.12 REQUIREMENTS 900 A BLOCKS 0.2 600 0.30 0.30 1.49 0.60 0.20 0.20 0.10 0.69 0.20 0.80 0.40 0.29 0.14 TYPE MATERIAL (CONCRETE AND 450 0.30 0.30 1.34 0.60 0.20 0.20 0.10 0.69 0.20 0.65 0.40 0.18 0.25 0.12 m m m m m m m m m m m3 m3 m3 UNIT (M) IN REQUIREMENT 1:3:6) DIMENSIONS 1:2:4, APRON APRON DIAMETER WINGWALLS WINGWALLS APRON HEADWALLS HEADWALLS HEADWALLS HEADWALLS FOUNDATION FOUNDATION (Concrete) MATERIAL FOUNDATION DIMENSION PIPE (Concrete HEAD/WINGWALLS (Concrete/Masonry) a b c d e g h k f I I FIGURE H.12 - HEADWALL TYPE 4 ( FOR ACCESS CULVERTS) Diameter 450 600 900 (D) (mm) (mm) (mm) Dimensions in (m) a 0.15 0.2 0.2 b 0.1 0.15 0.15 c 0.86 1.12 1.48 d 0.56 0.72 1.08 e 0.14 0.18 0.27 f (min.) 0.34 0.45 0.68 g - - - h 0.24 0.33 0.42 i - - - Concrete Volume in (m3/m) 0.16 0.3 0.48 Application - Fair subgrade condition; - Overfill > ¾ Diameter; - Seasonal waterflow only. Remarks - Use gravel material for back/ overfill.
a b c d e f g h I m FIGURE H.11 - HEADWALL TYPE 3B (STONE MASONRY HEADWALLS) DIMENSIONS AND MATERIAL REQUIREMENTS TYPE B (STONE MASONRY) 900 600 0.40 0.30 1.49 0.60 0.20 0.40 0.10 0.69 0.40 0.80 0.40 0.26 0.58 0.14 450 0.40 0.30 1.34 0.60 0.20 0.40 0.10 0.69 0.40 0.65 0.40 0.24 0.50 0.12 TYPE A (CONCRETE BLOCKS 900 600 0.30 0.30 1.49 0.60 0.20 0.20 0.10 0.69 0.20 0.80 0.40 0.2 0.29 0.14 450 0.30 0.30 1.34 0.60 0.20 0.20 0.10 0.69 0.20 0.65 0.40 MATERIAL REQUIREMENT 0.18 0.25 0.12 PIPE DIAMETER IN (M) UNIT m m m m m m m m m m m3 m3 m3 FOUNDATION FOUNDATION APRON APRON WINGWALLS WINGWALLS HEADWALLS HEADWALLS HEADWALLS HEADWALLS FOUNDATION (Concrete 1:2:4, 1:3:6) HEAD/WINGWALLS (Concrete/Masonry) APRON (Concrete) DIMENSION a b c d e f g h I k I FIGURE H.12 - HEADWALL TYPE 4 ( FOR ACCESS CULVERTS) Diameter (D) 450 (mm) 600 (mm) 900 (mm) Dimensions in (m) a 0.15 0.2 0.2 b 0.1 0.15 0.15 c 0.86 1.12 1.48 d 0.56 0.72 1.08 e 0.14 0.18 0.27 f (min.) 0.34 0.45 0.68 g - - - h 0.24 0.33 0.42 i - - - Concrete Volume in (m3/m) 0.16 0.3 0.48 Application - Fair subgrade condition; - Overfill > ¾ Diameter; - Seasonal waterflow only. Remarks - Use gravel material for back/ overfill.
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