Device for setting sockets for swimming pool ladders

作者: Samuel Kaufman

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摘要: For setting the sockets for swimming pool ladders in deck of pool, a pair is provided which are connected to channel bar formed sheet metal with upwardly directed and inwardly slanting longitudinal flanges. This then set at proper position, secured ground by deformed steel rods running through holes metal. The filled grout when holds securely place. sand, removed use hose after has been poured, screeded cured.

参考文章(5)
Clifford L Svedahl, Step insert for concrete pipe sections ,(1964)
Paul D Prizler, David A Stanwood, Swimming pool grab rail structure ,(1961)
Silverman Ira, Swimming pool ladder ,(1960)
William O Baker, Grab rail construction ,(1958)