279results about "Shaping building parts" patented technology

A trench shield ladder that hangs on the wall of the trench shield to provide workmen safe access to a trench. The ladder is provided with a top platform and hand rails that extend over the platform. The ladder can be adjusted in length by employing an extension portion with hooks that hang the extension on the main rungs of the main ladder. The extension portion is not as wide as the main portion of the ladder so that the legs of the extension rest between the legs of the main portion of the ladder. The ladder and extension are provided with stand off arms that hold the main and extension rungs of the ladder away from the wall of the trench shield. The present invention is designed to fit on trench shields of varying thicknesses.

Disclosed is a modular platform comprising a horizontal frame that is made of four angle irons and is devised and sized to receive and support a grid on which one or more persons can stand. Four supporting legs, each made of an angle iron, are respectively connected to the four corners of the frame, and extend below the same in order to maintain it at a distance from the ground. Reinforcing pieces are positioned below the frame and connected to the supporting legs for reinforcing the platform. The platform also comprises at least two thin holding bars extending horizontally between two opposite sides of the frame, in order to support the grid on the frame while preventing it from staying directly on the angle irons forming the frame. Each supporting leg has a lower end provided with a supporting foot that is adjustable in height, and has a lower end of a round shape to reduce the contact surface with the ground. The platform structure makes the platform very easy to clean.

The invention is a portable, modular stairway unit for use on a building site during construction of a multistorey building, the stairway unit including: a stair run section with a plurality of rise-separated stair treads, the stair run section having an upper and a lower end; an upper landing connected to the stair run section at, or at a distance from, the upper end of the stair run section; a lower landing connected to the stair run section at, or at a distance from, the lower end of the stair run section; wherein each of the landings have portions that extend laterally beyond a width of the stair run section, the landings being devised to extend inwardly into respective upper and lower storey levels of the building when the stairway unit is situated adjacent to a face of the building; and anchoring means arranged to removeably secure the landings, in use, at the upper and lower storey levels thereby to provide a double-cantilevered mounting of the stair run section extending between the two building storey levels.

A ramp is assembled from first and second boards such that the first and second boards are foldable relative to one another. Rail assemblies comprising first and second channels are fastened along opposing sides of the boards. First and second hinge members, fastened to the sides of the first and second channels, pivotally couple the channels. Two central hinge members are mounted on the boards respectively to pivotally couple the boards at a central location between the opposing sides of the boards. An auxiliary hinge member is supported on the bottom of the first channels to provided added support to the pivotal coupling between the first and second channels. The auxiliary hinge member and the central hinge members are interchangeable with one another.

The invention discloses a tool-type suspension staircase for a deep foundation pit. The tool-type suspension staircase comprises a ladder assembly, a ladder assembly supporting seat and a staircase body, wherein the ladder assembly consists of two groups of ladder assembly units, a gap for installing the staircase body is arranged between the two groups of ladder assembly units, each group of ladder assembly unit comprises four stand columns, the cross section of each ladder assembly unit is in a rectangular shape, the upper end of each stand column is perpendicularly and fixedly connected with a steel beam above the stand column, and the lower end of each stand column perpendicularly stretches to the bottom surface of the foundation pit; the ladder assembly supporting seat is fixedly connected with a foundation pit enclosure, the ladder assembly supporting seat comprises two or four steel beams, and the steel beams are fixed on the upper surface of a crown beam of the enclosure structure; the staircase body is installed between the two groups of ladder assembly units from top to bottom in sequence, a corner between two adjacent staircase bodies is provided with a resting platform, and the resting platform is fixed in the internal space of the ladder assembly units. The staircase has a suspension characteristic and is installed from top to bottom, so that the staircase can be tightly combined with the procedure of the foundation pit project; the staircase is convenient for construction personnel to pass, high is safety, high in disassembling and installation speed and high in circulation rate.

A platform system comprising a platform structure having at least one modular platform unit with platform connection features on a side surface thereof to which other components can be connected, the other components including at least two of the following: another modular platform unit, a stair unit, a tower unit, a handrail unit, and a ladder unit. A stair assembly is connected to the platform structure via said connection features, the stair assembly comprising a plurality of stair units connected together to provide a number of steps equal to the sum of steps of the stair units.

A stair climbing aid comprises two slide rails, an assist member, a control mechanism and two positioning assemblies. The slide rails and the assist member are assembled to handrails at both sides of the stairs. The control mechanism is disposed on the assist member to be controlled by the user. The positioning assemblies are disposed at both sides of the assist member, each positioning assembly is provided with an engaging portion to be engaged in the respective positioning portions of the slide rail. Thereby, an anti-slide effect is produced, so as to prevent the user from falling down the stairs and to help the user move from step to step safely.

A step mounting apparatus includes a stepping portion, at least one mounting support extending from the stepping portion, and at least one contact member attached to the at least one mounting support. The at least one contact member is adjustable with respect to the stepping portion such that an angle between the at least one contact member and the stepping portion can be varied.

A modular, prefabricated stair tower comprising a plurality of stairs, landings, handrails and hangers pre-assembled into a module configured such that it might be shipped and installed into a wind power tower tube section, with installation preferably occurring prior to shipment to the wind farm jobsite so that, when the tube section is erected vertically, authorized personnel gain immediate, efficient and economical access for ascending and descending large land based and offshore wind power turbine towers.