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The Retractable inside corners will allow the four inside forms of a stair or elevator shaft to be moved as one unit. The Safety-Platform will support the weight of the forms and workmen while the stripping procedure is being completed.

The collapsed inside shaft forms and platform are moved up together to the next lift position in one unit. When the platform locks into place at the next lift position, the crane can be released.

The workmen can then expand the inside form at the collapsible inside corner.

HORIZON HOUSE - SEATTLE, WA

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