There is no standard or definitive guide to the installation of access covers and frames. These recommendations are designed to assist in the installation of ERMATIC covers in general situations that present no particular technical difficulties.
All frames and beam wallboxes must be adequately, solidly and continuously supported to a degree sufficient for the designed load conditions in each particular case. ERMATIC covers and frames are made from machined elements, assembled to strict tolerances.
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In this document, the recommendations are given in good faith and reflect the latest research; nevertheless, we cannot accept any liability from their adoption. The description and choice of products must be adequate with the specific conditions of each application (conditions of use and installation). The covers' concrete infill is part of the complete product, so a particular care should be taken regarding its manufacture and application. The expected quality shall be the same as required for construction work concrete with high mechanical performances (> 40 Mpa after 28 days on a test cylinder of 150 x 300 mm). Therefore its composition shall be studied to achieve the highest possible performance with regard to the specific concreting conditions of this application.
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