All Sliding door hardware is compact, strong and reliable requiring only a soft touch to operate quietly and smoothly. The maximum door weights are 176 lbs (standard sliding hardware) and up to 353 lbs (heavy duty hardware) For example: a 4’ X 8’ frame minus the panel material weighs 29 lbs; ¼ " glass weighs 3.28 lbs per square foot, ½" glass weighs 6.56 lbs per square foot and ¼" acrylic 1.7 lbs per square foot.