A method of producing a polygonal closed cross-section structural component includes press-forming a metal sheet into a gutter-shaped pre-processed part with a curved form along its longitudinal direction having plural ridge lines corresponding to corner portions of the polygonal closed cross-section in a cross-sectional form developed by cutting the component at a position corresponding to the ridge line located at the innermost side in the radial direction to provide a flange portion extending along the ridge line at the resulting respective ends, and press-forming the pre-processed part to deform inwardly in the cross-sectional direction at a position of one or more of the plural ridge lines to butt the ridge lines located at the innermost side and the flange portions to each other.

A method of extruding a component includes: creating a first design of a component, wherein in the first design the component comprises a member and is configured for an implementation; adding at least one radial fin to the member in the first design, the member and the radial fins being a second design of the component; extruding a piece that conforms to the second design and has at least one extruded radial fin; and altering the extruded radial fin on the extruded piece, the alteration adding or enhancing a structural property of the component in the implementation.

A mounting bracket (50) comprises a non-planar structure shaped by bending one or more portions of a planar body, wherein the planar body comprises before it is formed into a planar body a two-dimensionally profiled load-path approximated lower-mass structure. The planar body may be a blank stamped from material sheet or a slice separated from a profiled material block. The two-dimensionally profiled planar body may be iteratively designed using load-path analysis taking account of functional regions and preserve regions. The bracket may be used as load support for wall and roof cladding installations that require a large number of support brackets.

Tread members for climbing products are described herein that have indented treads that may provide enhanced grip and/or improved slip resistance. The treads are formed on a standing or other engagement surface of the tread member. In some approaches, the treads may be incorporated into an upper surface of a rung, step, platform, or plank of the climbing product. The treads include a plurality of pips or ridges extending across the tread member in a first direction. The first direction may be an extrusion direction or a lateral direction. The pips or ridges may provide slip resistance in a direction perpendicular to the first direction. The pips or ridges further have a plurality of indentations or cuts formed therein at an angle of about 5 degrees up to about 90 degrees relative to the first direction. So oriented, the indentations may provide slip resistance in additional directions.