How do I read a WS-GM code?

WS-GM45-55: pit 400 mm wide × 500 mm long (4 and 5 dm), cover 55 mm high. The class (T-2 to T-25) is stated with the order.

Are the frames included?

Yes – every cover is supplied with its matching angle bedframe and anchor lugs, trial-fitted in the shop.

WS drainage pit covers – GM – US, AU & EU standards

The system

Grating pit covers are used on catch basins, sediment traps, drainage wells and sink holes in roads, parks, plants and civil projects. Each WS-GM set is a grating cover and an angle bedframe with anchor lugs; the type code gives the pit size in decimetres and the cover height – WS-GM45-55 is a 400 × 500 mm pit with a 55 mm cover.

Plan and section of a drainage pit cover in its bedframe — WS-GM drainage pit cover and bedframe.

Class T-25

WS-GM, class T-25
Pit W × L (mm)	Type	Grating b × a × h (mm)	kg	Bedframe b × a × h (mm)	Angle	Frame kg
300 × 400	WS-GM34-55	305 × 500 × 55	14.2	335 × 520 × 60	L60×5	7.6
400 × 400	WS-GM44-55	395 × 500 × 55	18.3	425 × 520 × 60	L60×5	8.5
500 × 400	WS-GM54-55	485 × 500 × 55	22.5	515 × 520 × 60	L60×5	9.3
300 × 500	WS-GM35-65	305 × 620 × 65	22.8	335 × 640 × 70	L70×5	9.4
400 × 500	WS-GM45-65	395 × 620 × 65	29.5	425 × 640 × 70	L70×5	10.4
500 × 500	WS-GM55-65	485 × 620 × 65	36.2	515 × 640 × 70	L70×5	11.4
300 × 600	WS-GM36-75	305 × 740 × 75	28.6	335 × 760 × 80	L80×5	11.5
400 × 600	WS-GM46-75	395 × 740 × 75	36.4	425 × 760 × 80	L80×5	12.6
500 × 600	WS-GM56-75	485 × 740 × 75	44.3	515 × 760 × 80	L80×5	13.7
500 × 700	WS-GM57-75	485 × 840 × 75	49.9	515 × 860 × 80	L80×5	14.5
700 × 700	WS-GM77-75	695 × 840 × 75	70.6	725 × 860 × 80	L80×5	17.1

Class T-20

WS-GM, class T-20
Pit W × L (mm)	Type	Grating b × a × h (mm)	kg	Bedframe b × a × h (mm)	Angle	Frame kg
300 × 400	WS-GM34-50	305 × 490 × 50	12.8	335 × 510 × 56	L56×6	7.7
400 × 400	WS-GM44-50	395 × 490 × 50	16.5	425 × 510 × 56	L56×6	8.6
500 × 400	WS-GM54-50	485 × 490 × 50	20.3	515 × 510 × 56	L56×6	9.5
300 × 500	WS-GM35-55	305 × 600 × 55	16.7	335 × 620 × 60	L60×5	8.2
400 × 500	WS-GM45-55	395 × 600 × 55	21.7	425 × 620 × 60	L60×5	9.0
500 × 500	WS-GM55-55	485 × 600 × 55	26.6	515 × 620 × 60	L60×5	9.8
300 × 600	WS-GM36-65	305 × 720 × 65	26.2	335 × 740 × 70	L70×5	10.8
500 × 600	WS-GM56-65	485 × 720 × 65	41.6	515 × 740 × 70	L70×5	13.1
600 × 600	WS-GM66-65	605 × 720 × 65	51.9	635 × 740 × 70	L70×5	14.6
500 × 700	WS-GM57-75	485 × 840 × 75	49.9	515 × 860 × 80	L80×5	14.5
700 × 700	WS-GM77-75	695 × 840 × 75	68.0	725 × 860 × 80	L80×5	17.1

Class T-14

WS-GM, class T-14
Pit W × L (mm)	Type	Grating b × a × h (mm)	kg	Bedframe b × a × h (mm)	Angle	Frame kg
300 × 400	WS-GM34-45	305 × 480 × 45	11.3	335 × 500 × 50	L50×5	6.5
400 × 400	WS-GM44-45	395 × 480 × 45	14.7	425 × 500 × 50	L50×5	7.2
500 × 400	WS-GM54-45	485 × 480 × 45	18.0	515 × 500 × 50	L50×5	7.8
300 × 500	WS-GM35-50	305 × 590 × 50	15.1	335 × 610 × 56	L56×6	8.2
400 × 500	WS-GM45-50	395 × 590 × 50	19.5	425 × 610 × 56	L56×6	9.2
500 × 500	WS-GM55-50	485 × 590 × 50	24.0	515 × 610 × 56	L56×6	10.1
300 × 600	WS-GM36-55	305 × 700 × 55	19.3	335 × 720 × 60	L60×5	8.7
400 × 600	WS-GM46-55	395 × 700 × 55	25.0	425 × 720 × 60	L60×5	9.6
500 × 600	WS-GM56-55	485 × 700 × 55	34.6	515 × 720 × 60	L60×5	10.4
600 × 600	WS-GM66-55	605 × 700 × 55	38.2	635 × 720 × 60	L60×5	11.5
500 × 700	WS-GM57-60	485 × 810 × 60	38.1	515 × 830 × 65	L65×5	12.7
700 × 700	WS-GM77-60	695 × 810 × 60	54.6	725 × 830 × 65	L65×5	15.2

Class T-2

WS-GM, class T-2
Pit W × L (mm)	Type	Grating b × a × h (mm)	kg	Bedframe b × a × h (mm)	Angle	Frame kg
300 × 400	WS-GM34-32	305 × 454 × 32	7.9	335 × 472 × 36	L36×4	4.4
400 × 400	WS-GM44-32	395 × 454 × 32	10.3	425 × 472 × 36	L36×4	4.8
500 × 400	WS-GM54-32	485 × 454 × 32	12.6	485 × 472 × 36	L36×4	5.0
300 × 500	WS-GM35-40	305 × 570 × 40	11.9	335 × 590 × 45	L45×5	5.9
400 × 500	WS-GM45-40	395 × 570 × 40	15.4	425 × 590 × 45	L45×5	6.5
500 × 500	WS-GM55-40	485 × 570 × 40	18.9	515 × 590 × 45	L45×5	7.2
300 × 600	WS-GM36-40	305 × 670 × 40	13.8	335 × 690 × 45	L45×5	6.3
400 × 600	WS-GM46-40	395 × 670 × 40	17.9	425 × 690 × 45	L45×5	6.9
500 × 600	WS-GM56-40	485 × 670 × 40	21.9	515 × 690 × 45	L45×5	7.5
600 × 600	WS-GM66-40	605 × 670 × 40	27.4	635 × 690 × 45	L45×5	8.3
500 × 700	WS-GM57-45	485 × 780 × 45	28.2	515 × 800 × 50	L50×5	8.6
700 × 700	WS-GM77-45	695 × 780 × 45	40.4	725 × 800 × 50	L50×5	10.2

Covers and bedframes are trial-fitted and supplied as matched sets. Other sizes, hinged and lockable covers are made to order.

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