Ductile Iron Manhole Cover & Frame - BS 497 Features  Leakage of Foul Smell is prevented by water sealing principle design. Water tight (If required by customer). Balanced and non-rattling when walk-over or cross-over by vehicles. Light in weight due to thin section casting technique. Opening and closing are made easy by using easy-to-make special tools. Protected with corrosion-resistant paint with pencil hardness of between H-2H. Allows addition of locking facility to deter theft. Specifications      Model No D1 D2 T D3 S H Std.   Weight   (kg) Breaking   Load   (Ton) PLXF 300 300 345 5 356 390 45 14 20 PLXF 350 350 395 5 406 440 45 16 20 PLXF 450 450 495 5 506 540 45 22 20 PLXF 500 500 545 5 556 590 45 27 20 PLXF 600 600 645 5 656 690 45 35 20   GRADE:   HEAVY DUTY MATERIAL:   DUCTILE IRON OPTIONAL:   -KEYLOCK  -WATER PROOF   Model No D1 D2 T D3 S H Std.   Weight   (kg) Breaking   Load   (Ton) PLXF 300 300 350 6 365 410 50 17 40 PLXF 350 350 400 6 415 460 50 23 40 PLXF 400 400 450 7 465 490 50 26 40 PLXF 450  450 500 7 515 560 50 30 40 PLXF 500 500 550 8 565 610 50 38 40 PLXF 600 600 650 9 665 710 50 56 40 PLXF 600 600 650 9 665 710 100 89 40   GRADE:   HEAVY DUTY MATERIAL:   DUCTILE IRON OPTIONAL:   -KEYLOCK  -WATER PROOF