Is there a requirement for reinforcing within uPCV sliding doors/frame?

The door manufacturer will have strict guidelines to follow from the upvc profile company. It usually depends on width and height. Most doors do have reinforcing though. Hope this helps, shaun

All fabrication companies do have guidlines to what needs reinforcing. All the doors in the 20 years i have been in the business have had reinforcing in. Hope this is helpful? Regards Paul