| HUGHES - Products - Cover Slabs |

Manufactured and Kitemarked to BS EN 1917:2002 and BS 5911-3:2002

COVER SLABS

All the following openings can be supplied but only those marked can be Kitemarked.

DN	Cover Slab Access
DN	600 sq.	675sq.	750x600	750sq.	1200x675
900				NA	NA
1050					NA
1200					NA
1500
1800
2100
2400
2700
3000

• DN1350 Cover Slabs are still manufactured but cannot be supplied Kitemarked.
• 600x600mm access holes are still available but on DN1200 and above slabs cannot be Kitemarked.

• As a general guide, access hole sizes 750x750mm and 1200x675mm are used in shallow depth manholes (ie. less than 1.5m deep).

• Access holes sizes 600x600mm, 675x675mm and 750x600mm are used in deeper manholes.
• Each Water Company has its own specific requirements for access sizes. Details are available from Contract Specification documents, from individual Water Company websites or from the current Sewers for Adoption publication.

	TYPICAL DETAIL of HUGHES Range of Cover Slabs

Nominal Diameter (DN)	Access Hole Sizes
	Minimum Thickness (mm)	Outside Diameter (mm)	Weight Each (tonnes)	Minimum Thickness (mm)	Outside Diameter (mm)	Weight Each (tonnes)
	600 x 600mm			675 x 675mm
900	125	1140	0.20	125	1140	0.17
1050	140	1262	0.25	140	1262	0.23
1200	140	1437	0.41	140	1437	0.37
1350*	150	1616	0.62	150	1616	0.57
1500	160	1768	0.80	160	1768	0.78
1800	165	2097	1.23	165	2097	1.21
2100	200	2390	2.06	200	2390	2.01
2400	200	2720	2.55	200	2720	2.50
2700	200	3330	4.20	200	3330	4.15
3000	225	3500	5.00	225	3500	4.95

	750 x 600mm			1200 x 675mm
900	-	-	-	-	-	-
1050	140	1470	0.22	-	-	-
1200	140	1437	0.38	-	-	-
1350*	150	1616	0.58	175	1810	0.54
1500	160	1768	0.79	175	2000	0.96
1800	165	2097	1.22	175	2340	1.48
2100	200	2390	2.01	200	2680	1.85
2400	200	2720	2.50	200	2925	2.34
2700	200	3330	4.15	200	3330	4.00
3000	225	3500	4.95	225	3500	4.76

	750 x 750mm			Other Sizes
900	-	-	-	125	1140	0.17
1050	140	1470	0.40	140	1470	0.48
1200	-	-	-	140	1680	0.32
1350*	-	-	-	175	1810	0.52
1500	-	-	-	175	2000	1.08
1800	-	-	-	175	2340	1.60
2100	-	-	-	200	2680	1.98
2400	-	-	-	200	2925	2.47
2700	-	-	-	200	3330	4.00
3000	-	-	-	200	3500	4.80

REDUCING SLABS

Available to suit Chamber rings from DN1200 to DN3000 for use in deep manholes.
DN1350 Slabs can be supplied on request but will not be Kitemarked.

Nominal Diameter (DN)	Hole Diameter (mm)	Minimum Thickness (mm)	Outside Diameter (mm)	Weight Each (tonnes)
1200	900	140	1680	0.56
1350	900	150	1810	0.73
1500	1050	160	2000	0.84
1800	1050 or 1200	165	2340	0.94
2100		200	2680	2.27
2400		200	2925	3.12
2700		200	3330	3.92
3000		225	3500	4.70

LANDING SLABS

A similar range to Reducing Slabs is available but with DN900 holes.
Other hole sizes can be supplied but cannot be Kitemarked.

SPECIAL and BESPOKE SLABS

HUGHES specialise in manufacture of special and bespoke slabs for a wide variety of applications and uses.

Features can include:

• Thicker slabs.

• Rebated access holes.

• Multiple access

• Non-standard holes to meet your specific requirements.

• 'Guardsman' access

• Casting in davit sockets, surface boxes, valve spindle holes.

Send us a drawing and we will submit proposals.

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