90° handrail and bottom chord bends made of S235JR steel—prefabricated corners with a bending radius of r = 70 mm and a leg length of 340 mm, for the arched handrails measuring 400 × 400 mm. Compatible with profiles measuring 20 × 8, 25 × 8, 40 × 8, 50 × 10, 40 × 12, and 50 × 14 mm in smooth, hammered, grooved, and semi-circular designs.