wooden ramp on the playground with non-slip crossbeams. used to ascend up an inclined plane. horses have a similar one when enteri

agility army ascend ascending beams boots bridge car carriage cattle children cow crossbeam crossbeams design dog enteri entering farm fitting floor have hiking horizontal horse horses incline inclined kids ladder material military non nonslip nursery obstacle one plane playground ramp ranch retro room rough school screw shoemaker similar slip slope stable surface texture training transport used walking wall when wooden yard