The floor lock is to be used as a friction brake and has no lifting ability. Instead the spring take action when load is added. The castors maintain the load. Bottom plate with rubber mat.
The foot brake in pressed steel has a recommended spring depth of 5 mm. Maximum spring depth is 12 mm.
The heavy foot brake in cast iron has a recommended mounting height of 202 ± 2 mm. Recommended spring depth is 3 mm. Maximum spring depth is 7 mm.