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 ...

Not only can you possibly slip off the side and cut a gash in your face on these crazy tread stairs, you could slip and fall crotch first onto the middle bar. Very useful for keeping fatties off the ...

With so many types and styles to choose from, the best stair treads can be difficult to narrow down. Of course, most top-selling sets are nonslip and nice to look at — but how do you find the ideal ...

Ladders come in a range of styles to suit any number of applications, but step ladders are most common for indoor use. These fold-out, A-frame ladders tend not to surpass 10 feet and typically have ...