United States Gypsum Company

Clifford Black

James Joseph Lehane

Francis Harold Laux

A J-runner, used in the construction of shaft walls in buildings is provided with a lifting element or ledge or both to permit simple centering of studs or shaft walls or both. By providing a lifting member in a lower J-runner, the studs or shaft walls or both can rest upon the lifting member to assist in vertically centering the studs or shaft walls or both when the shaft is fully constructed.

Growing community of inventors

Chicago, IL, United States of America

Clifford Black