A building structure comprising a support structure having upper portion extending to adjacent a floor structure above the support structure and adapted to receive stand-off fasteners there along, a plurality of stand-off fasteners each having a lower portion and an upper portion, where the lower portion of the stand-off fasteners comprises a self-drilling end portion and an adjacent thread-forming portion and, when installed into the upper portion of the support structure, at least a portion of the upper portion of each stand-off fastener extends significantly above the upper portion of the support structure, a cementitious wall structure formed above the upper portion of the wall structure with the upper portions of the stand-off fasteners encapsulated in the cementitious wall structure.

A building structure comprising a support structure having upper portion extending to adjacent a floor structure above the support structure and adapted to receive stand-off fasteners there along, a plurality of stand-off fasteners each having a lower portion and an upper portion, where the lower portion of the stand-off fasteners comprises a self-drilling end portion and an adjacent thread-forming portion and, when installed into the upper portion of the support structure, at least a portion of the upper portion of each stand-off fastener extends significantly above the upper portion of the support structure, a cementitious wall structure formed above the upper portion of the wall structure with the upper portions of the stand-off fasteners encapsulated in the cementitious wall structure.

A prefabricated modular reinforced concrete building system includes panel assemblies for foundations, walls, decks, and roofs designed to be built out in a manufacturing facility, shipped to a job site, and filled with concrete. Panel assemblies incorporate a space frame to ensure structural integrity during shipping and during concrete fill. Space frames can include structural columns, rebar mats, spacers, straps, and skin panels. Panel assemblies may be manufactured to contain architectural interior/external finishes, windows/doors, and pre-installed utility distribution systems.

A method of manufacturing a waffle slab includes providing a bottom mold separately on columns and exposing joint heads of the columns from the bottom mold; providing first sets of beam bars separately on the bottom mold to be parallel along a first direction; and providing second sets of beam bars separately on the bottom mold to be parallel along a second direction, wherein the second sets b of beam bars are configured to intersect with the first sets of beam bars without interference and together they form accommodation spaces for waffle molds.

A method of manufacturing a waffle slab includes providing a bottom mold separately on columns and exposing joint heads of the columns from the bottom mold; providing first sets of beam bars separately on the bottom mold to be parallel along a first direction; and providing second sets of beam bars separately on the bottom mold to be parallel along a second direction, wherein the second sets b of beam bars are configured to intersect with the first sets of beam bars without interference and together they form accommodation spaces for waffle molds.