Are unitized sill brackets adjustable for vertical positioning?

Unitized sill brackets are designed as fixed components that provide a stable base for the elevator door system. Their primary function is to ensure that the door operates smoothly and securely within the structural framework of the elevator shaft. Because they are intended for precise installation, the size and shape of these brackets do not allow for vertical adjustments once installed.

The inherent design of unitized sill brackets emphasizes structural integrity and consistency in the door operation. Therefore, any adjustment to their vertical positioning would compromise both safety and functionality, making them unsuitable for such alterations. This explains why the answer is that they are not adjustable for vertical positioning.