My thoughts on pricing scaffolds using standard rates:
M3 for birdcage or m2 for access takes no account of what is in the way, it takes no account of how high the starting point is off the base level, it takes no account of how high the scaffold is and it takes no account of the size of the scaffold be it one large scaffold or a number of small ones. M3 or M2 takes no account of grid sizes or scaffold requirements.
Lets assume a standard cuplok grid of 2.5m x 2.5m x 2.0m lifts.
Example 1: 15,000m3 birdcage @ 6m high = 50x50m on plan
One big birdcage = 441 legs and 3,360 horizontals
Example 2: 15,000m3 birdcage @ 6m high = 50x50m on plan
This time 10m x 10m x 25 number = 625 legs and 7,500 horizontals
Around twice the equipment, transport and labour for the same money. This would only be compounded if the grid is closed down to fit into a gap.
The same logic would apply to and scaffold where a general volume is given.
The same can be said about high scaffolds verses low scaffolds.
For instance a 10m long scaffold @ 2m high has a kicker and a first lift so the cost of the kicker is in the m2 rate/ 20 sq m
Same 10 m scaffold only now 10m high has the cost of the kicker spread over 100 Sq m
There are many different variations on the theme but they all amount to the same answer, standard rates do not apply to all scaffolds and as such should not be applied to all scaffolds.
It would seem I could ramble on, on the subject