If requested, for greater security when the hatch is open, it is suggested that welded sleeves be installed at the four corners of the hatch, allowing the insertion of 1067 mm (3''-6'') high posts, connected together at the top by removable sections. A plug will be installed on each of the sleeves to prevent the sleeve from filling with concrete during installation, as well as to prevent the penetration of dirt when the posts are not in place. Galvanized steel fence for galvanized steel hatch, aluminum fence for aluminum hatch.
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