San Francisco : Architect and Engineer, Inc · leaf 172
ail chutes are builton two by two by one-quarter inch angle backing whichis applied during the early stages of the constructionwork so that nothing will interfere with the chute be-ing perpendicular as required by law. It is hardly evernecessary, however, to have these angles extend outfrom the… … In the majority of cases the ceilings of the lobby,and often the ceilings of the halls on other floors, havean ornamental plaster mould through which the mailchute has to extend. If some thought is not given tothe meeting of the two, an unsightly condition is sureto arise which could just as well…
Architecture · Building
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