Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 472
Fig. 6. No. 135, RICHARDS SWIVEL DOOR HANGER Fig. 7. No. 104, RICHARDS STANDARD FIRE DOORFIXTURES The No. 135 Richards Bail-Bearing Swivel Door Hanger for folding partitions(Fig. 6) is fitted with a ball-bearing swivel and with vertical screw adjustment, eitherFibre or Metal wheels are supplied.…
Building materials
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