A modular building section defining the roof and opposing walls of a modular clearspan building. The building section includes a roof portion extending in a longitudinal direction between opposite first and second ends, and a pair of first and second legs, each leg pivotally attached about a pivot axis to the roof portion proximate a roof portion end. Each of the first and second legs has a stowed position in which the leg generally extends in the longitudinal direction and is in superposition with the roof portion, and an expanded position in which the leg depends from the roof portion and generally extends perpendicularly to the longitudinal direction. The legs are moveable independently of each other from their respective stowed positions to their respective expanded positions under the influence of gravity during lifting of the roof portion. Also disclosed are methods for constructing a modular clearspan building.

A building system that includes a modular panel with side members, at least one of the side members having an associated coupling for hooked connection with a corresponding shaped fixture of an adjacent structure, the coupling and fixture being adapted to be held together by a locking device that, when engaged, acts to lock the structure and the side member together and, when disengaged, allows for play between the panel and structure in order to free the panel from the structure.

A building system that includes a modular panel with side members, at least one of the side members having an associated coupling for hooked connection with a corresponding shaped fixture of an adjacent structure, the coupling and fixture being adapted to be held together by a locking device that, when engaged, acts to lock the structure and the side member together and, when disengaged, allows for play between the panel and structure in order to free the panel from the structure.

A mobile building constructed on a trailer, comprising: a wheeled trailer upon which the building is built, a floor and a plurality of walls secured to the trailer; and a roof structure, wherein external sides of the walls are braced with sheeting secured to the walls, the sheeting extending from a base of the building and securing to the roof structure.

A roof structure includes: horizontal base materials forming a roof slope; and roof panels fixed on the horizontal base materials and spread side by side in a slope direction, each of the roof panels includes a roofing board, and rafters fixed to a lower surface of the roofing board in parallel to each other, and extending perpendicularly to the horizontal base materials, each of the rafters of one of the two adjacent roof panels in the slope direction includes a carry-out portion projecting from an edge of the roofing board, each of the carry-out portions being between the rafters of the other roof panel and fixed to the roofing board of the other roof panel, a projection length of the carry-out portions is smaller than a distance between the adjoining horizontal base materials, and the carry-out portions and the other roof panel are fixed to the same horizontal base material.

A roof structure includes: horizontal base materials forming a roof slope; and roof panels fixed on the horizontal base materials and spread side by side in a slope direction, each of the roof panels includes a roofing board, and rafters fixed to a lower surface of the roofing board in parallel to each other, and extending perpendicularly to the horizontal base materials, each of the rafters of one of the two adjacent roof panels in the slope direction includes a carry-out portion projecting from an edge of the roofing board, each of the carry-out portions being between the rafters of the other roof panel and fixed to the roofing board of the other roof panel, a projection length of the carry-out portions is smaller than a distance between the adjoining horizontal base materials, and the carry-out portions and the other roof panel are fixed to the same horizontal base material.

This invention relates to prefabricated, lightweight, multi-component structural modular building panels and modular building systems. The said panels are framed with edge members that have a unique connecting shape, making them modular. The multi-component panel allows for design flexibility and the mass manufacturing of its components. Connectors serve as a link to assemble the panels together, and to connect them to corners, floors or foundations, roof panels and the roof apex member, and or other conventional construction elements. Connectors and members, all with unique connecting shapes, coupled with the said panels, create a structural wall, roof, similar structure or building system. Assembled panels and members incorporate the primary building structure and the building envelope. The assembled panels, members and other components of the building system, in part or whole, can be flat packed for easy transport and shipping, and can be assembled quickly and easily with semi-skilled labor.

Modular building methods and systems using lightweight modular panels, and specially configured transition panels for transitioning from wall to floor, or from wall to roof. Identically configured standard panels are used for constructing the walls, floor, and roof, with transitions from one structure to the next (e.g., wall to floor, or wall to roof). Each of the variously configured panel types includes channels (e.g., 2 pair of channels) formed through the length of the foam body, where the channels are configured to receive splines (e.g., flanges of an I-beam) therein. In the standard panel, the channels may include pairs of top and bottom channels, with the channels offset towards the respective panel major faces. In the transition panels, the channels may be similarly configured, but positioned differently to make the appropriate transition. The splines are connected to a frame, which acts as a template and transfers loads to a foundation.

There is disclosed a method of constructing a building, comprising installing: wall structure of the building, the wall structure comprising a panel having opposed skins and a core within which extends at least one cavity; and a ceiling structure of the building, such that the ceiling structure is adjacent the wall structure, and the wall structure bounds a space at a side of the space and the ceiling structure bounds the space at a top of the space, and such that: the space is sheltered and/or isolated from the elements; and/or lock-up is attained in respect of said space, the method further comprising: thereafter installing at least one service line through at least one said cavity of said panel and/or installing at least one service line which comprises at least one said cavity of that panel; and thereafter installing a roof structure of the building over the ceiling structure, wherein a connector is secured between the wall structure and the ceiling structure to form therebetween a connection which is such that the connector engages both the ceiling structure and at least one of the skins so as to direct, to the skin(s) engaged thereby, loading exerted by the ceiling structure, and wherein said at least one said cavity is accessed through said connector and/or through said ceiling structure, to install the service line(s).

A modular rafter assembly is provided. The modular rafter assembly includes a plurality of different types of rafters having varying lengths and that are adjustable to varying pitches. The modular rafter assemblies disclosed herein utilize a plurality of rafters in varying lengths, widths, and using varying thickness plates to allow for differing load calculations. Each of the rafters also includes a pitch adjusting mechanism that allows adjustment of the pitch of the rafter depending on the desired roof pitch.