In New Zealand, the PAPIs are set up to accomodate the largest aircraft using the runway. The exact specifcations are prescribed in NZCAA AC 139 beginning on page 97.
(Link to document)
For this reason, NZAA and NZCH (which handle nearly all of the heavies operating into or out of the country) are positioned to have a TCH of 73ft, which offers the heavies sufficient clearance from the fence and all other obstacles if they were to be flown with 2 red 2 white from the pilots perspective. These airports regularly handle aircraft of B747/A340 size.
Smaller airports have different TCHs. For example, NZDN, which normally handles aircraft up to B737/A320 size has the TCH set to 58 ft, while NZNP, which only normally has up to DH8C (and maybe AT72?) has the TCH set to 47 ft.