Lloyd Alter is Design Editor for Treehugger and teaches Sustainable Design at Ryerson University in Toronto. Alternating tread stairs are terrific for saving space; you only put one foot on a tread at ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? POP Projects is a collection of new and classic projects from more than a century of ...

Amateur carpenters who have laid out the cuts in a stair stringer (the zig-zag structural support for the steps) know the queasy feeling that bubbles up at the prospect of this job. There’s the simple ...