A modular wide top beam extension system for cargo containers is disclosed. The system comprises a base beam with a rectangular cross-section and a removable modular top section. The base beam includes notches on its side walls, while the modular top section features a flat top surface extending beyond the base beam's width and vertically descending sections with clips. These clips engage with the notches, securing the top section to the base beam. This design allows for easy installation, removal, and replacement of the wide top section. The system can be manufactured from various materials, including metals, plastics, and composites, to suit different load requirements. The modular nature of the system reduces costs by allowing the base beam to function independently or as part of a wide-top configuration.

Methods and apparatuses for shipping of fabricated rectangular wooden modules used for construction of a wood frame structure and for shipping of other bulky items are described. In particular, the disclosure features a modified shipping container for shipping the fabricated rectangular wooden modules and methods of loading, transporting, and unloading the fabricated rectangular wooden modules. The modified shipping container features a removable header system and a removable cover. The fabricated rectangular wooden modules include a module length axis, a module width axis, a bounded wood perimeter, and joists or rafters oriented perpendicularly to the module length axis, and are stacked as cargo in the interior of the container such that joists or rafters of the fabricated rectangular wooden modules are substantially vertical and the length axes of the modules are substantially parallel to a length axis of the container.

The disclosure provides an article of manufacture that includes a rectangular horizontal member, a vertical member bisecting a length of the horizontal member and forming a T-junction at the horizontal member, first and second sloped members spanning from a top of the vertical member to opposing ends of the horizontal member, and first and second support members spanning from the T-junction between the vertical member and horizontal member to work points on an underside of each of the first and second sloped members. The article of manufacture can be assembled on the ground at a construction site from prefabricated units shipped together in parallel planar orientation in a shipping container to provide a truss unit for forming the roof of a structure.