Steel access cover FAQs

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.

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.

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

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.

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

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.

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