An improved building access system includes a turntable having an upper surface and a lower surface, a main tower attached to the turntable's upper surface, a boom tower pivotally attached to the turntable and disposed so as to form an angle with the main tower, and a balancing tower also pivotally attached to the turntable and also disposed so as to form an angle with the main tower. It also includes means for changing these angles between the main tower and, respectively, the boom tower and the balancing tower, and a cathead pivotally attached to the end of the boom tower which is opposite the end attached to the turntable. The inventive apparatus also includes pressure sensing devices located and disposed so as to measure the pressure at each mounting point where the main tower is attached to the turntable, along with one or more leveling rods disposed so that, as the boom tower is raised upwardly and the angle between the main tower and the boom tower decreases in value by an associated amount, the angle between the cathead and the boom tower decreases in value by the same amount. The turntable may further include at least one support arm configured so that the bending forces experienced by the turntable are transferred to a larger diameter support structure. The invention also includes an elongated beam member which is especially useful for forming box beams, which member has a pair of symmetrical planar side elements which are perpendicular to each other and which are also connected together by a diagonal element.

An elastic clamp is for coupling props to beams. The clamp includes a minimum of two elastic wings able to hold and exert pressure on opposite lateral faces of the beam to be supported by the prop. The clamp allows the prop to be retained in a place selected along the beam to be supported, and prevents the prop from falling and rotating sideways.

An uplift-resisting assembly, connected to a top of a tubular member of a height adjustable structural column, acts to transfer load, particularly uplift loads imposed on the structure to which the column supports, therethrough and into the tubular member. The housing of the assembly is connected to the tubular member, which is connected to a base such as a footing. A threaded rod extends through the housing and into the tubular member. A top plate, connectable to a structure above is attached to the top of the threaded rod. An adjustment nut, threaded onto the threaded rod for adjusting the height of the column is sandwiched between the top of the housing and the top of the tubular member. The adjustment nut bears on the tubular member in compression and bears on the top of the housing during uplift, the uplift being transferred via the housing into the tubular member.

An uplift-resisting assembly, connected to a top of a tubular member of a height adjustable structural column, acts to transfer load, particularly uplift loads imposed on the structure to which the column supports, therethrough and into the tubular member. The housing of the assembly is connected to the tubular member, which is connected to a base such as a footing. A threaded rod extends through the housing and into the tubular member. A top plate, connectable to a structure above is attached to the top of the threaded rod. An adjustment nut, threaded onto the threaded rod for adjusting the height of the column is sandwiched between the top of the housing and the top of the tubular member. The adjustment nut bears on the tubular member in compression and bears on the top of the housing during uplift, the uplift being transferred via the housing into the tubular member.

An uplift-resisting assembly, connected to a top of a tubular member of a height adjustable structural column, acts to transfer load, particularly uplift loads imposed on the structure to which the column supports, therethrough and into the tubular member. The housing of the assembly is connected to the tubular member, which is connected to a base such as a footing. A threaded rod extends through the housing and into the tubular member. A top plate, connectable to a structure above is attached to the top of the threaded rod. An adjustment nut, threaded onto the threaded rod for adjusting the height of the column is sandwiched between the top of the housing and the top of the tubular member. The adjustment nut bears on the tubular member in compression and bears on the top of the housing during uplift, the uplift being transferred via the housing into the tubular member.

An uplift-resisting assembly, connected to a top of a tubular member of a height adjustable structural column, acts to transfer load, particularly uplift loads imposed on the structure to which the column supports, therethrough and into the tubular member. The housing of the assembly is connected to the tubular member, which is connected to a base such as a footing. A threaded rod extends through the housing and into the tubular member. A top plate, connectable to a structure above is attached to the top of the threaded rod. An adjustment nut, threaded onto the threaded rod for adjusting the height of the column is sandwiched between the top of the housing and the top of the tubular member. The adjustment nut bears on the tubular member in compression and bears on the top of the housing during uplift, the uplift being transferred via the housing into the tubular member.

An elastic clamp is for coupling props to beams. The clamp includes a minimum of two elastic wings able to hold and exert pressure on opposite lateral faces of the beam to be supported by the prop. The clamp allows the prop to be retained in a place selected along the beam to be supported, and prevents the prop from falling and rotating sideways.

The present invention discloses a shoring apparatus, a system incorporating the apparatus, and a related method utilizing the apparatus in the system for an improvement in conducting concrete edge repairs in multi-story buildings. The shoring apparatus includes a structural member and attachment features that are configured to make the shoring apparatus attachable to the underside of a concrete structure that is to undergo edge repairs. The shoring apparatus is advantageous over shore poles in that they securely support the concrete form without relying on a lower structure to counter the load of the structural repair.

The present invention discloses a shoring apparatus, a system incorporating the apparatus, and a related method utilizing the apparatus in the system for an improvement in conducting concrete edge repairs in multi-story buildings. The shoring apparatus includes a structural member and attachment features that are configured to make the shoring apparatus attachable to the underside of a concrete structure that is to undergo edge repairs. The shoring apparatus is advantageous over shore poles in that they securely support the concrete form without relying on a lower structure to counter the load of the structural repair.

A high-capacity beam includes interoperable features conformant with the pretexting modular grid shoring system including conformant interface rails and conformant end caps that removably engage with the conformant interface rails. The truss portion of the high-capacity beam has the same width and a greater height compared to the truss portion of the low-capacity beam. The high-capacity beam may also include a conformant T-slot and beveled end faces on respective opposing sides of the high-capacity truss portion. A nominal 8-foot length of the modular high-capacity beam weighs less than about 50 lbs., while a nominal 6-foot length of the low-capacity beam weighs less than about 40 lbs. A grid shoring assembly utilizing the high-capacity main beams is rated for supporting a nominal 13-inch concrete platform, while a grid shoring assembly utilizing the low-capacity main beams is rated for supporting a nominal 6-inch concrete platform.