The connection point is set at 500/1000 m. The captive mobile cups are made of malleable Cast iron to ensure rough site handling and welded bottom cups are pressed from high-quality steel. Loose spigots are used to provide trouble-free and stronger connections between vertices. All ledgers/Horizontals have identical forged blade ends to fit in the cups of the standards. https://2024trendingtopic.blogspot.com/2025/05/building-strong-foundations-guide-to.html