Hydraulic vs. Bifold
Hydraulic doors are large in size and just like an airplane wing, the doorframe must be able to flex during
operation. The hydraulic cylinders on each side of the doorway are connected to the doorframe and the
building using spherical bearings. The spherical bearings accommodate the flexibility of the doorframe
while at the same time allowing the cylinders to raise and lower the door without binding on the hydraulic cylinder pins and brackets.