A modular building system, includes a modular building assembly, including a base mounting structure with first and second base angle brackets; a left receiving wall assembly, including a left primary wall assembly, and left front and left rear corner brackets; a right primary wall assembly, and right front and right rear corner brackets; and front and rear wall assemblies; and a platform with legs; such that the modular building assembly is positionable on a top surface of the platform.

A modular seamless corner component for providing a corner to a structure without having to compromise between structural integrity and energy efficiency. The continuous insulation and structure of the modular seamless corner component provide for a stronger corner because there are no seams to magnify stress and provide for a high energy efficiency because there is no thermal bridging.

A ventilated structural panel comprising a first sheet, having a long axis defining a length and a perpendicular short axis defining a width, a plurality of spacing structural elements, fixedly attached to the first sheet such that the yield strength of the panel is greater than the individual yield strength of the first sheet, and the plurality of spacing structural elements being formed such that a plurality of unobstructed pathways are created for air to move from at least one edge of the panel to at least one of an opposite and an adjacent edge of the panel, wherein the first sheet is the only sheet in the panel.

A structural plank assembly, including: (a) a plurality of structural beams connected together to define a structural plank building foundation; (b) a bottom wall; (c) a top wall; and (d) a structural foam filling the enclosure, and wherein at least one of the structural beams includes: (i) a top planar member; (ii) a bottom planar member; (iii) two or more vertical end members connected to the top planar member and to the bottom planar member; and (iv) a series of repeating angled planar members, each angled planar member being connected to the top planar member and to the bottom planar member.

A structural plank assembly formed from: (a) a plurality of structural beams that define an enclosure; (b) a bottom wall; (c) a top wall; and (d) a structural foam filling the enclosure, wherein at least one of the structural beams includes: (i) a top planar member; (ii) a bottom planar member; (iii) a wall member connected to the top and bottom members; (iv) a pair of shelf members; and (v) four angled members, wherein each of the four angled members have sectional knockouts passing therethrough.

Systems and methods are disclosed herein to a structural insulated panel framing system comprising: insulation sheathing receivable by a wall jig; a frame for placement atop the insulation sheathing; and spray foam for application to the frame and the insulation sheathing to fuse the frame and insulation sheathing to produce a structural insulated panel.