A built-up beam includes a pair of I-beams each having opposing flanges, a web that extends between the opposing flanges, a plurality of flange openings in each of the opposing flanges, a plurality of web openings in the web, and a plurality of bolt holes in one of the opposing flanges. The I-beams are stacked together flange-to-flange in a stacked beam configuration and a plurality of bolts extend through the plurality of bolt holes and secure the pair of I-beams together in the stacked beam configuration.

A truck assembly is configured to travel along a track having rails, and includes a first side frame, a second side frame, and a bolster extending between the first side frame and the second side frame. One or more of the first side frame, the second frame, or the bolster includes at least a portion formed as an I-beam that includes a web having a first end and a second end opposite from the first end, a first flange extending from the first end of the web, and a second flange extending from the second end of the web. A thickness of the web increases away from a first neutral axis towards the first flange and the second flange.

A structural fuse is disclosed including a fuse base and a fuse plate extending from the fuse base. The fuse plate may include a reduced diameter yield section configured to yield at loads on the structural fuse above a threshold. The reduced diameter yield section includes a pair of slots on either side of the yield section, which slots receive a pair of spacers. The spacers are integrally formed as part of the fuse plate, and remain attached to the fuse plate during fabrication of the structural fuse.

Systems and methods for forming insulated sandwich walls are provided. Outer and inner support members are located between inner and outer strongbacks. Structural material for an outer wall, such as concrete, is deposited between the outer strongback and outer support member. Structural material for an inner wall is deposited between the inner strongback and inner support member. An insulating material is deposited between the outer and inner support members to form an insulating core.

A structural stud post assembly comprising a center receiver section having opposing receiver channels formed by side walls and angled flanges, and a pair of raceway inserts also defining a raceway channel for accepting wiring and equipment to be disposed in the raceway. The raceways can be installed in the receiver channels to accept and accommodate wiring and equipment. The center receiver comprises a thermal break at about a midpoint to prevent there from being a metal-to-metal thermally conductive pathway through the stud. The structural stud post may be used in the construction of modular building systems.

A built-up beam includes a pair of I-beams each having opposing flanges, a web that extends between the opposing flanges, a plurality of flange openings in each of the opposing flanges, a plurality of web openings in the web, and a plurality of bolt holes in one of the opposing flanges. The I-beams are stacked together flange-to-flange in a stacked beam configuration and a plurality of bolts extend through the plurality of bolt holes and secure the pair of I-beams together in the stacked beam configuration.

The present technology relates to beams having a cross section defining a plurality of channels and assemblies comprising the beams. The beams can be used to form a beam assembly that is installed inside the truck bed of a pick-up truck. A ladder loader is pivotably secured to the beam assembly along either the driver side wall or the passenger side wall of the truck bed, with the ladder loader being pivoted between a stow position where the ladder loader is above the beam assembly, and a deployed position where the ladder loader is positioned outside either the driver side wall or the passenger side wall.

A shear beam-column connection includes a first beam, a first tapered bolt having a non-threaded portion and a threaded end portion, and a column including a first wedge slot block. The non-threaded portion of the first tapered bolt is fixedly secured, e.g., by welding, to the first beam. The wedge slot block includes a cavity for removably receiving the non-threaded portion of the first tapered bolt. The first wedge slot block is fixedly secured to the column, e.g., by welding. The first beam can be secured to the column by positioning the first beam adjacent the column such that the non-threaded portion of the bolt is inserted into the cavity. A nut can be threaded to the free end of the bolt to further secure the beam to the column.

A structural stud post assembly comprising a center receiver section having opposing receiver channels formed by side walls and angled flanges, and a pair of raceway inserts also defining a raceway channel for accepting wiring and equipment to be disposed in the raceway. The raceways can be installed in the receiver channels to accept and accommodate wiring and equipment. The center receiver comprises a thermal break at about a midpoint to prevent there from being a metal-to-metal thermally conductive pathway through the stud. The structural stud post may be used in the construction of modular building systems.

A structural fuse is disclosed including a fuse base and a fuse plate extending from the fuse base. The fuse plate may include a reduced diameter yield section configured to yield at loads on the structural fuse above a threshold. The reduced diameter yield section includes a pair of slots on either side of the yield section, which slots receive a pair of spacers. The spacers are integrally formed as part of the fuse plate, and remain attached to the fuse plate during fabrication of the structural fuse.