ADVANTAGES Factory produced to vigorous standards Ease of handling and installation Site progress less affected by adverse weather conditions Reduce construction period Speed of installation Units can be delivered 7 days after casting by steam curing process to achieve high early strength   TYPES AND SIZES Hume Box Culverts are available in both Standard Size (for nominal widths between 600 mm and 1800 mm) and Super Sizes (for nominal widths between 2100 mm an 3600 mm ) in lengths of 1 metre as shown in Tables 1, 2 and 3. Hume Box Culverts are available both with and without dry weather flow (DWF) sections.   DESIGN CONSIDERATIONS AND SPECIFICATIONS   Design Loading requirements for Hume Box Culverts in accordance with BS 5400 : Part 2 : 1978 modified by (b), Departmental Standard BD 31/87 - Buried Concrete Box Type Structure issued by Departmental of Transport (UK) - Highway and Traffic, JKR LTAL (Long Term Axle Load) and SV (Special Vehicle) requirements. Reinforced concrete design in accordance with BS 5400 : Part 4 : 1984. Concrete characteristic strength at 28 days, fcu = 30MPa - 40MPa Concrete cover to reinforcement for:- Standard Size Box Culverts = 25 mm Super Size Box Culverts = 30 mm Soil parameters used in the design :- coefficient of the earth lateral pressure at rest = 0.5 bulk density of the soil = 19 kN/m3 Hume's Standard Size Box Culverts (not exceeding 1800 mm width and 1800 mm height) are designed to cater for backfill superimposed dead load not exceeding 2 m depth (inclusive of pavement) plus 45 units of HB vehicle primary live loads. Hume's Standard Size Box Culverts also comply with proof test load of 112.5 kN over an area of 320 mm x 320 mm placed at any position on the Culvert Lid. Testing procedure is in accordance to AS 1597: Part 1: 1974. Hume's Super Size Box Culverts are designed to cater for backfill superimposed dead load not exceeding 4 m depth (inclusive of pavement )plus 45 units of HE vehicle primary live loads. Hydrostatic pressures are eliminated by the provision of 50 mm diameter weepholes pierced along the centreline of the invert wall.     DRAINAGES | Page 1 | Page 2 | Page 3 | Page 4 | Page 5   Top HUME CONCRETE MARKETING SDN BHD (8411-T) Level 2, Bangunan Pan Global, No. 1A, Jalan Tandang, P.O.Box 21, 46700 Petaling Jaya, Selangor. Hot-line: (603) 7785 5282 Tel: (603) 7783 3068 Fax: (603) 7785 1823 E-mail: Adam Hussein (HIMB-PJ)