Trailer ramp air lift assist home made

Home made trailer ramp airbag lift assist. Standard 2600lb air lift air bags. 1“x2“ 3/16“ tube for all the bracing and the 4ft long bar. The rest is 1/4“ plate. Air lines air 3/8“ These ramps are very heavy and weigh roughly 400lbs or so. The trailer is a 40,000lb tag trailer for heavy equipment hauling. System operates on about 120psi