A computer-implemented method designs a tying bar enclosing a plurality of concrete-reinforcing bars in a 3D scene of a computer-aided design system. The method a) provides the three-dimensional models of the concrete-reinforcing bars to be enclosed by the tying bar; and b) computes a set of traces of each of the concrete-reinforcing bars. Each trace has a trace center. Next a set of connection lines is computed. Each connection line binds the trace centers. A set of circular arcs is computed. Each circular arc surrounds at least partially a respective trace, and a set of segments. Each segment is approximately parallel to a respective connection line and connects consecutive circular arcs. The segments and circular arcs form a center curve of the tying bar in the sketch plane. Lastly, the tying bar is designed based on the center curve and the bar radius of the tying bar.

A method of installing a vertical reinforcing bar in a masonry wall includes constructing a base portion of the masonry wall, positioning a vertical holster within the base portion, stacking concrete masonry units above the base portion to form a vertical core within the concrete masonry units that is aligned with the vertical holster, and lowering the vertical reinforcing bar through the vertical core and the opening of the upper portion of the vertical holster until the leading end of the vertical reinforcing bar is secured to securing means of the vertical holster.

A method of installing a vertical reinforcing bar in a masonry wall includes constructing a base portion of the masonry wall, positioning a vertical holster within the base portion, stacking concrete masonry units above the base portion to form a vertical core within the concrete masonry units that is aligned with the vertical holster, and lowering the vertical reinforcing bar through the vertical core and the opening of the upper portion of the vertical holster until the leading end of the vertical reinforcing bar is secured to securing means of the vertical holster.

A method for securing rebar prior to concrete pour consists of tying, by hand in a series of unique steps, a piece of wire with 2-inch loops on either end around the rebar at joints where the rebar sections come together. The present method is used in place of a mechanical system as required in the prior art and requires no tools or other devices. Execution of the present method is up to 7 times faster and results in a stronger tie than other tying methods. The present method provides substantial savings in manpower and time on any application requiring reinforced concrete.

A computer-implemented method designs a tying bar enclosing a plurality of concrete-reinforcing bars in a 3D scene of a computer-aided design system. The method a) provides the three-dimensional models of the concrete-reinforcing bars to be enclosed by the tying bar; and b) computes a set of traces of each of the concrete-reinforcing bars. Each trace has a trace center. Next a set of connection lines is computed. Each connection line binds the trace centers. A set of circular arcs is computed. Each circular arc surrounds at least partially a respective trace, and a set of segments. Each segment is approximately parallel to a respective connection line and connects consecutive circular arcs. The segments and circular arcs form a center curve of the tying bar in the sketch plane. Lastly, the tying bar is designed based on the center curve and the bar radius of the tying bar.

The invention relates to L-shaped sheet metal parts 21 with an angled longitudinal recess 23 as well as a reinforced concrete/prestressed concrete component with at least one upper and at least one lower longitudinal reinforcement layer and a shear force reinforcement guided in its dimension over the uppermost and the lowermost longitudinal reinforcement, which is formed from the L-shaped sheet metal parts 21 according to the invention with stirrups 30 fastened in the longitudinal recess 23. The reinforced concrete/prestressed concrete component according to the invention is suitable for increasing the punching shear resistance in the region of slab columns of flat slabs.

A reinforcement steel bar includes a shaft part and a head part formed by forging an end portion of the shaft part. The head part is provided with a projection projecting from the shaft part in a radial direction of the shaft part, and a recess formed along a corner portion between an outer peripheral surface of the shaft part and the projection.

A reinforcement steel bar includes a shaft part and a head part formed by forging an end portion of the shaft part. The head part is provided with a projection projecting from the shaft part in a radial direction of the shaft part, and a flat surface extending parallel to an axial direction of the shaft part. A distance from a shaft center of the shaft part to the flat surface is in a range from 100% to 115% of a maximum radius of the shaft part.

Tool Free Rebar TieA metal wire tie consisting of a piece of 16 gauge wire between 8 and 12 inches long with a loop on each end and each loop closed with a twist. The inventive device is used to fasten rebar on construction sites prior to a concrete pour. The user grips the wire, placing gloved fingers through the loops, and wraps the wire around the joint where two rebar sections come together. The tie is used in place of a mechanical system and requires no tools or other devices to fasten the metal rods which reinforce concrete. Application of the tie is 2-3 times faster than the method currently in use providing substantial savings in man power and time for virtually any construction job where reinforced concrete is required.

A reinforced concrete composite beam structure based on precast concrete beam-slab integrated units include rib beams and rebar cages; stirrups in the rib beams are closed stirrups; upper parts of the closed stirrups in each rib beam are extended from the rib beam and taken as connecting rings; the rebar cages are disposed on upper parts of two connected rib beams; the connecting rings are lapped with beam surface closed stirrups to form the reinforced concrete composite beam structure with the rib beams after casting concrete. Its construction method includes: installing the precast concrete beam-slab integrated units; hoisting the rebar cages on the rib beams to tie two corresponding connecting rings with the corresponding beam surface closed stirrup in a staggered and overlapped manner; and casting concrete to submerge the rebar cages. A form of the closed stirrups is proposed when rib width of the rib beams is small.