A beam-node permanent formwork for casting reinforced concrete is disclosed, which includes using it for the construction of reinforced concrete 3D trusses in the tidal zone and underwater in coastal areas of reservoirs (from 1 to 12 meters deep) by eliminating deformations when filling the formwork with concrete and during operation, as well as by insulating concrete from the corrosive effects of salt water, biological destruction. The shell of the permanent formwork also significantly reduces the adhesion of concrete to ice, which significantly increases the service life of concrete products in the conditions of the sea or freezing reservoirs.

A gusset plate assembly for use in connecting at least two beams to a hollow tubular column in a building. The gusset plate assembly can receive said at least two beams in a biaxial orientation of said beams. The gusset plate assembly comprises gusset plates sized for transferring the weights of said at least two beams and their reaction forces and bending moments from the application of severe load conditions acting on the building to the hollow tubular column. At least one of the gusset plates receives a portion of a second of the gusset plates. A joint penetration groove weld joining the first and second gusset plates together allows the gusset plate assembly to be free of welds on its internal corners. A method of assembling a gusset plate assembly is also disclosed.

A corner fitting may include a male fitting having a convex portion and a female fitting having a concave portion configured complementary to the convex portion. In addition, the corner fitting may include a strap having a strap radius portion and a pair of strap planar portions extending from opposite ends of the strap radius portion. The strap planar portions may be parallel to one another when the strap radius portion is clamped between the convex portion and the concave portion and the corner fitting is viewed from a side, and non-parallel to one another when the corner fitting is viewed from an end.

A pin joint type structural member, made of double steel pipe consisting of a main pipe and a stiffening pipe, restrains buckling so as to be stable under axial compressive force. A clearance between the stiffening pipe 2 and the reinforcing member is determined so that a ratio (P.sub.c2/P.sub.c2) of the reinforcing member contact force with the stiffening pipe inner surface at the end 4b of a counter-clevis side, to the reinforcing member contact force with the stiffening pipe inner surface at the end 4a of the clevis side may be 0.40 to 0.65 when the reinforcing member 4 inclines to the main pipe 1 due to the axial force acting on the main pipe 1. In addition, a length L.sub.in that the stiffening pipe 2 overlaps with the reinforcing member 4 is at least 1.1 times as large as the reinforcing member outer diameter at the overlapping portion.

The invention relates to a modular structural system obtained from the combination, in sliding engagement form, of generically elongated elements A, B, C, D having sections whose perimeter is provided with protrusions and recesses which, in the spatial development of the elements A, B, C, D, form sliding channels or tracks for mutual sliding of the elements which form the structural system. The structural system may also be provided with node elements C shaped so as to have two parallel opposite surfaces, one of which is provided with sliding channels or tracks for mutual male/female engagement in corresponding sliding channels or tracks and the other surface of which is provided with a permanent or releasable connection with other elements A, B, C, D at a connection angle of 0<a<180 with respect to said opposite surfaces. The structural system may also be provided with nodes A, B, C instead of the node elements C.

A combined member, comprising a communication rod (1) and a connecting rod (2), wherein the connecting rod (2) comprises a rod body (2.1) and a connector (2.2), the connector (2.2) being a fastening connector (3) or a sleeving connector (4), the rod body (2.1) of the connecting rod (2.1) and a rod body of the communication rod (1) being of a strip-shaped structure, the connecting rod (2) being connected to the communication rod (1) by the fastening connector (3) or the sleeving connector (4), the axis of the connecting rod (2) intersecting that of the communication rod (1) connected thereto. The combined member has the advantages of high bearing capacity, and convenient construction.

A connector assembly, having an upper connector coupled to a lower connector and a gusset plate sandwiched between the upper and lower connectors. Also, disclosed is a hoistable connector assembly, a lifting frame assembly, a coupling system for modular frame units, a method for assembling a module unit using the connector assembly, and a modular frame unit and building having the connector assembly.

Unit cell bistable elements, and particular arrangements thereof, that can transform or morph a structure from one shape to another. In certain embodiments, the current invention includes unit cell bistable elements, and particular arrangements and uses thereof, that can transform or morph a structure from one shape to another. In an embodiment, the current invention provides a method/ability to transform any four-bar compliant mechanism into a bistable compliant mechanism. It is an object of the current invention to facilitate structures morphing from one specific shape to another specific shape using unit cell bistable elements.

An architectural structure for constructing a variety of goods in a variety of configurations is provided. The architectural structure includes a plurality of paired slat-like members and a spine configured to hold the plurality of paired slat-like members in an expanded state. Each paired slat-like members includes joined upper ends, joined lower ends and an expandable central region joined to an adjacent paired slat-like members.

A conduit clamp for securing a conduit component to channel framing includes first and second jaws each having opposite first and second end portions. The first end portions of the first and second jaws are configured for securement to one another, such that first and second jaws generally oppose one another and the second end portions of the first and second jaws are free from attachment to one another, to define a conduit receiving space between the first and second jaws. Each of the first and second jaws includes a coupling component at the second end portion thereof having a generally dovetail shape configured for reception in an external fitting groove of the channel framing to attach the conduit clamp to the channel framing.