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Steel access cover FAQs

How do I know what size steel access cover I need

Manhole cover dimensions are determined by the internal size of the access chamber, referred to as the clear opening, this is the hole through which a person or equipment can pass. To obtain an accurate clear opening, any existing cover or coverings must first be removed. The clear opening is critical as in many cases parts of the cover / frame hang within this void.

I can only take measurements of the cover and frame at surface level, can you work from these sizes

We can produce a cover and frame to match these dimensions but the internal frame opening may not align with the chamber. This is generally not an issue with single-lid units but can cause problems with twin and multiple covers where support beams are incorporated, the beams must fit accurately between the chamber walls.

I have a chamber with a clear opening that is different from any shown on your web site what do I do

Non-standard sizes are available on request, contact our sales department for a quotation.

Can I set two access covers side by side to cover a larger clear opening

Not without installing a central support, all four sides of the cover and frame need to be supported to achieve the required loading. We can supply a single-piece frame with multiple covers and a removable centre support bar for these situations.

I am installing a recessed cover & frame in a swimming pool area, are there any special requirements

Due to the corrosive nature of swimming pool environments we would only recommend the use of fully stainless steel grade 316 products.

Can you supply a recessed cover and frame with a grade 316 stainless visible edge

If the environment requires grade 316 stainless steel for corrosion protection, an edged cover and frame are unsuitable. Stainless steel edges on products are for aesthetic purposes only, the base material (galvanised steel) is still susceptible to atmospheric conditions.

What is the definition of a slow moving wheel load (SMWL)

Slow-moving wheel loads are deemed speeds no greater than 20 mph in low-intensity trafficked areas.

Relevant products

Stock code Range Overall top of frame Clear opening
(C x D)		 Frame depth
(E)		 Load duty Wrekin loading code Datasheet My Wrekin
C211K/030030 300 mm x 300 mm Pedestrian K
C211K/030030PSF 345 mm x 345 mm 300 mm x 300 mm 26 mm Pedestrian K
C211K/037037 375 mm x 375 mm Pedestrian K
C211K/045045 450 mm x 450 mm Pedestrian K
C211K/045045PSF 495 mm x 495 mm 450 mm x 450 mm 25 mm Pedestrian K
C211K/060045 600 mm x 450 mm Pedestrian K
C211K/060045P 450 mm x 450 mm Pedestrian K
C211K/060045PSF 645 mm x 495 mm 600 mm x 450 mm 25 mm Pedestrian K
C211K/060060 600 mm x 600 mm Pedestrian K
C211K/060060PSF 645 mm x 645 mm 600 mm x 600 mm 25 mm Pedestrian K
C211L/045045 450 mm x 450 mm Domestic light duty L
C211L/045045PSF 495 mm x 495 mm 450 mm x 450 mm 25 mm Domestic light duty L
C211L/060045 600 mm x 450 mm Domestic light duty L
C211L/060045P 600 mm x 450 mm Domestic light duty L
C211L/060045PSF 645 mm x 495 mm 600 mm x 450 mm 25 mm Domestic light duty L
C211L/060060 600 mm x 600 mm Domestic light duty L
C211L/060060PSF 645 mm x 645 mm 600 mm x 600 mm 25 mm Domestic light duty L
C211M/045045 450 mm x 450 mm Light / medium duty M
C211M/045045PSF 495 mm x 495 mm 450 mm x 450 mm 25 mm Light / medium duty M
C211M/060045 600 mm x 450 mm Light / medium duty M
C211M/060045PSF 645 mm x 495 mm 600 mm x 450 mm 25 mm Light / medium duty M
C211M/060060 600 mm x 600 mm Light / medium duty M
C211M/060060PSF 645 mm x 645 mm 600 mm x 600 mm 25 mm Light / medium duty M
C211MP/060045 600 mm x 450 mm Light / medium duty M+
C211MP/060045PSF 645 mm x 495 mm 600 mm x 450 mm 25 mm Light / medium duty M+
C211MP/060060 600 mm x 600 mm Light / medium duty M+
C211MP/060060PSF 645 mm x 645 mm 600 mm x 600 mm 25 mm Light / medium duty M+
C211N/060045 600 mm x 450 mm Medium duty N
C211N/060045PSF 645 mm x 495 mm 600 mm x 450 mm 25 mm Medium duty N
C211N/060060 600 mm x 600 mm Medium duty N
C211N/060060PSF 645 mm x 645 mm 600 mm x 600 mm 25 mm Medium duty N
C212N/120060 1,200 mm x 600 mm Medium duty N
C212N/120067 1,200 mm x 675 mm Medium duty N
C212N/120075 1,200 mm x 750 mm Medium duty N
C212N/120120 1,200 mm x 1,200 mm Medium duty N
C212N/120900 1,200 mm x 900 mm Medium duty N
C212N/150060 1,500 mm x 600 mm Medium duty N
C212N/150075 1,500 mm x 750 mm Medium duty N
C212N/150090 1,500 mm x 900 mm Medium duty N
C212N/180075 1,800 mm x 750 mm Medium duty N
C212N/180600 1,800 mm x 600 mm Medium duty N
C212N/18090 1,800 mm x 900 mm Medium duty N
C212N/200100 2,000 mm x 1,000 mm Medium duty N
C221K/030030 300 mm x 300 mm Pedestrian K
C221K/037037 375 mm x 375 mm Pedestrian K
C221K/045045 450 mm x 450 mm Pedestrian K
C221K/060045 600 mm x 450 mm Pedestrian K
C221K/060045PSF 640 mm x 490 mm 600 mm x 450 mm 25 mm Pedestrian K
C221K/060060 600 mm x 600 mm Pedestrian K
C221K/060060PSF 645 mm x 645 mm 600 mm x 600 mm 25 mm Pedestrian K
C221L/045045 450 mm x 450 mm Domestic light duty L
C221L/060045 600 mm x 450 mm Domestic light duty L
C221L/060045PSF 640 mm x 490 mm 600 mm x 450 mm 25 mm Domestic light duty L
C221L/060060 600 mm x 600 mm Domestic light duty L
C221L/060060PSF 640 mm x 640 mm 600 mm x 600 mm 25 mm Domestic light duty L
C221M/045045 450 mm x 450 mm Light / medium duty M
C221M/060045 600 mm x 450 mm Light / medium duty M
C221M/060045PSF 640 mm x 490 mm 600 mm x 450 mm 25 mm Light / medium duty M
C221M/060060 600 mm x 600 mm Light / medium duty M
C221M/060060PSF 640 mm x 640 mm 600 mm x 600 mm 25 mm Light / medium duty M
C221MP/060045 600 mm x 450 mm Light / medium duty M+
C221MP/060060 600 mm x 600 mm Light / medium duty M+
C221N/060045 600 mm x 450 mm Medium duty N
C221N/060060 600 mm x 600 mm Medium duty N
C222N/120060 1,200 mm x 600 mm Medium duty N
C222N/120067 1,200 mm x 675 mm Medium duty N
C222N/120075 1,200 mm x 750 mm Medium duty N
C222N/120120 1,200 mm x 1,200 mm Medium duty N
C222N/120900 1,200 mm x 900 mm Medium duty N
C222N/150060 1,500 mm x 600 mm Medium duty N
C222N/150075 1,500 mm x 750 mm Medium duty N
C222N/150090 1,500 mm x 900 mm Medium duty N
C222N/180075 1,800 mm x 750 mm Medium duty N
C222N/180600 1,800 mm x 600 mm Medium duty N
C222N/18090 1,800 mm x 900 mm Medium duty N
C222N/200100 2,000 mm x 1,000 mm Medium duty N
C231M/060045/LH 640 mm x 590 mm 600 mm x 450 mm 51 mm Light / medium duty M
C231N/072025/BT 825 mm x 335 mm 725 mm x 255 mm 86 mm N
C232N/061061/BT 695 mm x 680 mm 610 mm x 610 mm 86 mm N
C233N/091044/BT 980 mm x 520 mm 915 mm x 445 mm 86 mm N
C233N/096061/BT 1,040 mm x 683 mm 960 mm x 610 mm 86 mm N
C234N/131061/BT 1,380 mm x 683 mm 1,310 mm x 610 mm 86 mm N
C235N/169071/BT 1,765 mm x 783 mm 1,690 mm x 710 mm 86 mm N
C236N/228071/BT 2,360 mm x 783 mm 2,285 mm x 710 mm 86 mm N
C261N/061061/BT 610 mm x 610 mm 46 mm
C261N/072025/BT 725 mm x 255 mm 46 mm
C261N/091044/BT 915 mm x 445 mm 46 mm
C261N/170071/BT 1,705 mm x 710 mm 46 mm N
C261N/232074/BT 2,319 mm x 742 mm 46 mm N
C262N/131061/BT 1,310 mm x 610 mm 46 mm
C263N/170710/BT 1,705 mm x 710 mm 46 mm
C263N/232074/BT 2,319 mm x 742 mm 46 mm
C271M/030030 385 mm x 385 mm 300 mm x 300 mm 58 mm Light / medium duty M
C271M/030030/SQR 385 mm x 385 mm 300 mm x 58 mm Light / medium duty M
C271M/045045 535 mm x 535 mm 450 mm x 450 mm 58 mm Light / medium duty M
C271M/045045/SQR 535 mm x 535 mm 450 mm x 58 mm Light / medium duty M
C271M/060045 685 mm x 535 mm 600 mm x 450 mm 58 mm Light / medium duty M
C271M/060060 685 mm x 685 mm 600 mm x 600 mm 58 mm Light / medium duty M
C271M/067067 760 mm x 760 mm 675 mm x 675 mm 58 mm Light / medium duty M
C271M/075060 835 mm x 685 mm 750 mm x 600 mm 58 mm Light / medium duty M
C271M/075075 835 mm x 835 mm 750 mm x 750 mm 58 mm Light / medium duty M
C271M/090060 985 mm x 685 mm 900 mm x 600 mm 58 mm Light / medium duty M
C271M/090075 985 mm x 835 mm 900 mm x 750 mm 58 mm Light / medium duty M
C281M/030030 440 mm x 340 mm 300 mm x 300 mm 85 mm Light / medium duty M
C281M/030030/SQR 470 mm x 390 mm 300 mm x 85 mm Light / medium duty M
C281M/045045 590 mm x 490 mm 450 mm x 450 mm 85 mm Light / medium duty M
C281M/045045/SQR 600 mm x 540 mm 450 mm x 85 mm Light / medium duty M
C281M/060045 640 mm x 590 mm 600 mm x 450 mm 85 mm Light / medium duty M
C281M/060045/LH 640 mm x 490 mm 600 mm x 450 mm 85 mm Light / medium duty M
C281M/060060 750 mm x 640 mm 600 mm x 600 mm 85 mm Light / medium duty M
C281M/067067 825 mm x 715 mm 675 mm x 675 mm 85 mm Light / medium duty M
C281M/075060 790 mm x 750 mm 750 mm x 600 mm 85 mm Light / medium duty M
C281M/075075 890 mm x 790 mm 750 mm x 750 mm 85 mm Light / medium duty M
C281M/090060 940 mm x 740 mm 900 mm x 600 mm 85 mm Light / medium duty M
C291M/030030 440 mm x 340 mm 300 mm x 300 mm 105 mm Light / medium duty M
C291M/045045 590 mm x 490 mm 450 mm x 450 mm 105 mm Light / medium duty M
C291M/045045/D4 585 mm x 505 mm 450 mm x 450 mm 132 mm Light / medium duty M
C291M/060045 640 mm x 590 mm 600 mm x 450 mm 105 mm Light / medium duty M
C291M/060045/D4 655 mm x 585 mm 600 mm x 450 mm 132 mm Light / medium duty M
C291M/060060 750 mm x 640 mm 600 mm x 600 mm 105 mm Light / medium duty M
C291M/060060/D4 735 mm x 655 mm 600 mm x 600 mm 132 mm Light / medium duty M
C291M/067067 825 mm x 715 mm 675 mm x 675 mm 105 mm Light / medium duty M
C291M/075060 790 mm x 750 mm 750 mm x 600 mm 105 mm Light / medium duty M
C291M/075075 890 mm x 790 mm 750 mm x 750 mm 105 mm Light / medium duty M
C291M/090060 940 mm x 740 mm 900 mm x 600 mm 105 mm Light / medium duty M
C291N/045045 595 mm x 515 mm 450 mm x 450 mm 105 mm Medium duty N
C291N/045045/D4 585 mm x 505 mm 450 mm x 450 mm 132 mm Medium / heavy duty N
C291N/060045 665 mm x 600 mm 600 mm x 450 mm 105 mm Medium duty N
C291N/060045/D4 655 mm x 585 mm 600 mm x 450 mm 132 mm Medium / heavy duty N
C291N/060060 750 mm x 665 mm 600 mm x 600 mm 105 mm Medium duty N
C291N/060060/D4 735 mm x 655 mm 600 mm x 600 mm 132 mm Medium / heavy duty N
C291N/067067 825 mm x 740 mm 675 mm x 675 mm 105 mm Medium duty N
C291N/075060 815 mm x 750 mm 750 mm x 600 mm 105 mm Medium duty N
C291N/090060 965 mm x 750 mm 900 mm x 600 mm 105 mm Medium duty N
C291X/030030 450 mm x 365 mm 300 mm x 300 mm 105 mm Heavy duty X
C291X/045045 595 mm x 515 mm 450 mm x 450 mm 105 mm Heavy duty X
C291X/045045/D4 585 mm x 505 mm 450 mm x 450 mm 132 mm Heavy duty X
C291X/060045 665 mm x 600 mm 600 mm x 450 mm 105 mm Heavy duty X
C291X/060045/D4 655 mm x 585 mm 600 mm x 450 mm 132 mm Heavy duty X
C291X/060045/TR 665 mm x 600 mm 600 mm x 450 mm 130 mm Heavy duty X
C291X/060060 750 mm x 665 mm 600 mm x 600 mm 105 mm Heavy duty X
C291X/060060/D4 735 mm x 655 mm 600 mm x 600 mm 132 mm Heavy duty X
C291X/060060/TR 750 mm x 750 mm 600 mm x 600 mm 130 mm Heavy duty X
C291X/067067 825 mm x 740 mm 675 mm x 675 mm 105 mm Heavy duty X
C291X/075060 815 mm x 750 mm 750 mm x 600 mm 105 mm Heavy duty X
C291X/075075 895 mm x 815 mm 750 mm x 750 mm 105 mm Heavy duty X
C291X/090060 965 mm x 750 mm 900 mm x 600 mm 105 mm Heavy duty X
C292X/090090 1,090 mm x 990 mm 900 mm x 900 mm 110 mm Heavy duty X
C292X/122067 1,310 mm x 865 mm 1,220 mm x 675 mm 110 mm Heavy duty X
CALPRO40L/030030 390 mm x 390 mm 300 mm x 300 mm 40 mm Domestic light duty L
CALPRO40L/045045 540 mm x 540 mm 450 mm x 450 mm 40 mm Domestic light duty L
CALPRO40L/045045/SQR 540 mm x 540 mm 450 mm x 40 mm Domestic light duty L
CALPRO40L/060045 690 mm x 540 mm 600 mm x 450 mm 40 mm Domestic light duty L
CALPRO40L/060060 690 mm x 690 mm 600 mm x 600 mm 40 mm Domestic light duty L
CALPRO40L/067067 765 mm x 765 mm 675 mm x 675 mm 40 mm Domestic light duty L
CALPRO40L/075060 840 mm x 690 mm 750 mm x 600 mm 40 mm Domestic light duty L
CALPRO40L/075075 840 mm x 840 mm 750 mm x 750 mm 40 mm Domestic light duty L
CALPRO40L/090060 990 mm x 690 mm 900 mm x 600 mm 40 mm Domestic light duty L
CALPRO60N/045045 540 mm x 540 mm 450 mm x 450 mm 60 mm Medium duty N
CALPRO60N/045045/SQR 540 mm x 540 mm 450 mm x 60 mm Medium duty N
CALPRO60N/060045 690 mm x 540 mm 600 mm x 450 mm 60 mm Medium duty N
CALPRO60N/060060 690 mm x 690 mm 600 mm x 600 mm 60 mm Medium duty N
CALPRO60N/067067 765 mm x 765 mm 675 mm x 675 mm 60 mm Medium duty N
CALPRO60N/075060 840 mm x 690 mm 750 mm x 600 mm 60 mm Medium duty N
CALPRO60N/075075 840 mm x 840 mm 750 mm x 750 mm 60 mm Medium duty N
CALPRO60N/090060 990 mm x 690 mm 900 mm x 600 mm 60 mm Medium duty N
CALPRO80N/045045 540 mm x 540 mm 450 mm x 450 mm 80 mm Medium duty N
CALPRO80N/060045 690 mm x 540 mm 600 mm x 450 mm 80 mm Medium duty N
CALPRO80N/060060 690 mm x 690 mm 600 mm x 600 mm 80 mm Medium duty N
CALPRO80N/067067 765 mm x 765 mm 675 mm x 675 mm 80 mm Medium duty N
CALPRO80N/075060 840 mm x 690 mm 750 mm x 600 mm 80 mm Medium duty N
CALPRO80N/075075 840 mm x 840 mm 750 mm x 750 mm 80 mm Medium duty N
CALPRO80N/090060 990 mm x 690 mm 900 mm x 600 mm 80 mm Medium duty N
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