This disclosure relates generally to a stair bracket for concrete stair formwork.
Building concrete stairs requires building forms to hold and shape the concrete before it is poured. This may require caution to ensure the form is straight and has the required angles to form straight stairs. The forms are generally removed and thrown away after the concrete hardens.
The following presents a simplified summary of the disclosure to provide a basic understanding to the reader. This summary is not an extensive overview of the disclosure, nor does it identify key or critical elements of the claimed subject matter or define its scope. Its sole purpose is to present some concepts disclosed in a simplified form as a precursor to the more detailed description that is later presented.
A stair bracket may simplify the process of making forms to hold and shape concrete when building concrete stairs.
A stair bracket for concrete formwork may be a bracket that may be used to
build concrete stair formwork. It may be installed on a wood or steel runner or stinger, which may run above concrete that may be placed or poured for stairs or steps. It may be fastened to a wood or steel runner with fasteners, for example, nails, screws, or bolts. It may be striped or removed as the concrete is curing to finish the edges or left until after it has cured or dried.
Stringer 130 may be mounted to Wood Support 160 and Wood Support 180 at an appropriate angle for pouring the stairs. Wood Support 160 may be mounted on Slab 120, for example. Stringer 130 may be made of wood, steel, or any other material strong and rigid enough to hold Stair Brackets 100 in place when concrete is poured. Stair Brackets 100 may be fastened to Stringer 130 using Fastener 110, which may be nails, screws, bolts, or other fastening means.
For example, coarse-grained soil, fine graded soil, commercial by-products, or controlled low-strength material may be used as Backfill 150. In general, finely graded soil with low to medium plasticity, including silty or clayey fine sands, lean clays, and gravelly clays, may be used as Backfill 150.
Cutouts for Form 220 may hold 2×4, 2×6, 2×8, 2×10, or 2×12-inch wood as needed for building a desired form.
Stair Bracket 200 may be made out of 1/16″-¾″ steel, 1/16″-¾ aluminum, 1/16″-1″ plastic, ⅜″-2″ wood, or any material strong enough to support a form when concrete is poured. It may be used with 2×4s and plywood, a 2×4, a 2×6, or a 2×8. Height 230 and Width 240 may be approximately 16″, although sizes may vary depending on the size of form desired.
While the detailed description above has been expressed in terms of specific examples, those skilled in the art will appreciate that many other configurations could be used. Accordingly, it will be appreciated that various equivalent modifications of the above-described implementations may be made without departing from the spirit and scope of the invention.
Additionally, the illustrated operations in the description show appointments occurring in a particular order. In alternative implementations, certain operations may be performed in a different order, modified, or removed. Moreover, steps may be added to the above-described logic and still conform to the described implementations. Further, operations described herein may occur sequentially, or certain operations may be processed in parallel. Yet further operations may be performed by a single processing unit or by distributed processing units.
The foregoing description of various embodiments of the invention has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. It is intended that the scope of the invention be limited not by this detailed description, but rather by the claims appended hereto. The above specification, examples, and data provide a complete description of the manufacture and use of the invention. Since many embodiments of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims hereinafter appended.