У вашего броузера проблема в совместимости с HTML5
Time lapse build of my mini ramp
100% modular for storage reasons
Demensions:
4 feet tall w/ one 5 x 4 foot extension section
12 feet wide
22 feet long
2 inch coping
7' transition radius
1/2" ply for all transition sides and decks
1 layer 3/8" ply and 1 layer hardboard for sheeting
~$1000