Abstract: A tilt-form bracket for tilt up concrete wall construction includes a triangle brace piece that is mated atop a shoe plate piece for thinner wall construction. An optional height extension piece may be mounted atop the triangle brace piece for thicker wall construction. The triangle brace piece may include a pair of spaced apart triangle braces separated by a vertical wall that defines a form connection through hole.

Abstract: An adjustable height rebar chair includes a threaded rebar support column threadably connected to a tripod base, and each consists of a respective one-piece body of molded plastic. A top end of the rebar support column terminates in an adjustment handle that defines first and second concave rebar cradles that are orthogonal to each other. The rebar support column also includes a vertical surface extending from the adjustment handle toward a bottom end of a threaded rod, and the vertical surface has numerical indicia that decrease in magnitude in a direction toward the adjustment handle. A number of the numerical indicia that is located next to a top of the central core corresponds to a distance along a vertical centerline from the three feet of the tripod base to at least one of the first and second concave rebar cradles.

Abstract: A stackable rebar chair includes a one-piece body of molded plastic that includes four vertical support legs and four vertical leg receiving sockets. The one-piece body also includes first and second concave rebar cradles that are oriented perpendicular to each other. Each of the support legs has a cross section that defines a first polygon, and each of the leg receiving sockets defines a partial second polygon that is both larger, and differently shaped, that the first polygon. When the rebar chairs are stacked, the four supporting legs of the upper chair are received in the leg receiving sockets of the lower chair in such a manner that a plurality of vertices of the first polygon are positioned, shaped and oriented to simultaneously match respective vertices of the partial second polygon.

Abstract: A plurality of identical slab bolster uppers each include a body with a rebar contact surface separated a height distance from a ground contact surface along a vertical axis. The rebar contact surface extends from a first end to a second end along a horizontal axis. The first end terminates in a planar abutment surface that is one side of a thickness profile, and the second end has a different shape that includes a planar abutment surface, and a snap-fit connector shaped to receive the thickness profile of the first end. Two slab bolster uppers may be moved from a disconnected configuration to a connected configuration exclusively responsive to sliding the planar surfaces along one another while in contact along a vertical axis until the thickness profile of the one slab bolster upper is received in the snap-fit connector on the other slab bolster upper.