Importance

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Abstract

An efficient method of installing an access door in a high temperature structure having an outer door casing spaced from an inner door liner, wherein the casing and liner are aligned to thereby define a passageway through a wall of the structure. The space between the casing, the liner and the structure wall is filled with compressed insulation, and this filled space is temporarily closed off with liner insert plates which thereby compress the insulation and provide a temporary door casing frame. The replacement prehung door assembly is installed in this surrounding temporary door casing frame, and the doorframe assembly is secured to the inner door liner, and thereafter the temporary insert plates closing off the space between the door casing and door liner are removed thereby permitting the compressed insulation in the space between the casing and the liner to expand and engage the doorframe assembly.

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First Claim