This unconventional structural system was inspired by the material in question: as unreinforced concrete has poor tensile strength, it is unsuitable for use in a cantilevered system as used in many ...

This half-scale model of a spiral staircase by American studio Matter Design is made from concrete treads that slip neatly over each other. Above and top: photograph by Brandon Clifford The Helix ...

Concrete paver stair steps that are cracking and shifting apart - victoras/Shutterstock One of the amazing ways to design a sloped backyard or landscape involves building steps to navigate the space ...