introduction bIg box manholEs Our biggest box manholes are available for use as Type 1-S manholes or lift stations . These sections are able to handle up to 3000mm diameter pipe . concrete pipe stormwater treatment technologies Big Box Sizing Guideline bIg box sIzIng guIdElInE 300 mm Wall Thickness Box Size 350 mm Wall Thickness Haunch Weight of Top & Weight of Top & 300mm Wall thickness 350mm Wall thicknessLifting Clutches Weight of Section Lifting Clutches Weight of Section Dimension Bottom Slab Bottom Slab (kg/m) Required (kg/m) Required Weight of Weight (kg/ea.) (kg/ea.) of haunch Weight of lifting Weight of lifting Box Size top & top & botsection 20 Ton clutches section clutchesTon dimension 3000x2500 8035 9220 9945 slab 10850 20 300 bottom tom (kg) required (kg) required slab (kg) (kg) 3000x3000 9335 9940 20 Ton 11500 11670 20 Ton 300 3 .0m Span x 2 .5m Rise 8035 23040 20 Ton 9945 27120 20 Ton 300 3000x3500 10630 10660 20 Ton 13055 12530 20 Ton 300 3 .0m Span x 3 .0m Rise 9335 24840 20 Ton 11500 29220 20 Ton 300 3000x4000 11925 11380 20 Ton 14610 13370 20 Ton 300 3 .0m Span x 3 .5m Rise 10630 26640 20 Ton 13055 31320 20 Ton 300 3500x3500 12105 11380 20 Ton 14820 13370 20 Ton 300 3 .0m Span x 4 .0m Rise 11925 28440 20 Ton 14610 33420 20 Ton 300 3500x4000 13580 12100 20 Ton 16585 14210 20 Ton 300 3 .5m Span x 3 .5m Rise 12105 28440 20 Ton 14820 33420 20 Ton 300 4000x4000 15235 12820 20 Ton 18555 15050 20 Ton 300 3 .5m Span x 4 .0m Rise 13580 30240 20 Ton 16585 35520 20 Ton 300 box sections Notes:4 .0m Span x 4 .0m Rise • • Notes: 15235 32040 20 Ton 18555 37620 20 Ton 300 1 . For sizes not shown, consider using 2 .5m section lengths . For shorter for additional information. All weights approximate and based on standard box sections, or call lengths, please scale appropriately or call . 2 . For sizes not shown, consider using standard box sections on page 12 or call for additional information . 3 . Call for pricing and construction schedules . All weights approximate. manhole and catch basin material LAFARGE PIPE eMANUAL PAGE 53