Adjustable plastic decking pedestal joist cradle is used to support all kinds of decking floors, like aluminum joist, wooden beam, composite decking etc.

It have 2 types head:

Type A broadwise and endwise joist installation, it has 2 direction. Joist width is from 20 to 60mm

Type B single direction joist installation. Joist width is from 20-80mm, for big joist.

What's the gap between two pedestals?

The pedestal gap is decided by the joist width, if the joist is bigger then the gap between pedetal may be large, if the joist is thin, then need more pedestals. Normally the gap between two pedestal is 40-50cm.