2 adjectives to describe ramps

Two heavyset men wearing shorts, T-shirts, and baseball caps were easing a boulder from the truck bed onto an impromptu ramp of two-by-sixes.

Amid much apparent confusion and tremendous chattering, a sort of rough ramp was engineered up the slip, and presently the horseless landau appeared borne in triumph by a mob of coolies superintended by our priceless Sabz Ali.

2 adjectives to describe  ramps