Patent ID: 7861470
Filing Date: 2011-01-04
Classification: E04B

Abstract:
1. A J-runner for shaft wall construction comprising: a substantially planar transverse middle section having opposed first and second longitudinal sides each having a length and opposed first and second ends each having a width, wherein the length of each longitudinal side is greater than the width of each end; a first upstanding section and a second upstanding section extending upwardly from the transverse middle section, wherein the first upstanding section has a first height and the second upstanding section has a second height, wherein the first height is less than the second height, the first upstanding section extending to the first height from the first longitudinal side of the middle section, and the second upstanding section extending to the second height from the second longitudinal side of the middle section, wherein the first upstanding section and the second upstanding section are substantially parallel, and wherein the middle section, the first upstanding section and the second upstanding section form a generally J-shape; at least one lifting element disposed on the middle section; wherein the at least one lifting element disposed on the middle section comprises a first ramping edge extending upwardly from the transverse middle section, the first ramping edge having a first end connected to the middle section, and having a second end disposed from the middle section to be between the first upstanding section and the second upstanding section, wherein the first ramping edge of the lifting element is disposed at an angle α, and α is greater than 45° and less than 90° with respect to a y-axis parallel to the second upstanding section and passing through the first end of the respective lifting element, the first end of the at least one lifting element being proximal to the first upstanding section and the second end of the at least one lifting element being distal to the first upstanding section, further comprising at least one lifting member, selected from the group consisting of a first upstanding section shelf aligned substantially parallel to the middle section and a second upstanding section shelf, aligned substantially parallel to the middle section; wherein if the J-runner comprises the first upstanding section shelf, then the first upstanding section comprises a first lower portion, the first upstanding section shelf, and an first upper portion, the first upstanding section lower portion extending generally vertically from the first longitudinal side of the middle section, and the first upstanding section shelf transversely extends distally, relative to the middle section, from an upper longitudinal edge of the first lower portion of the first upstanding section to a lower longitudinal edge of the first upper portion of the first upstanding section; and wherein if the J-runner comprises the second upstanding section shelf, then the second upstanding section comprises a second lower portion, the second upstanding section shelf, and a second upper portion, the second upstanding section lower portion extending generally vertically from the second longitudinal side of the middle section, and the second upstanding section shelf transversely extends distally, relative to the middle section, from an upper longitudinal edge of the second lower portion of the second upstanding section to a lower longitudinal edge of the upper portion of the second upstanding section.