Bus duct is more restrictive of the TI build out...
The Service is just inside the perimeter of the curtain wall. A direct rise vertically takes the bus duct right through the most valuable rental footage: the window zone.
Owners hate that.
Further, bus duct requires higher skill levels from the troops. Out my way the designs are dumbed down to our 'talent pool'.
Which also explains the pervasive use of MC. This selection is so automatic with some contractors that they ignore lower cost EMT runs.
EMT beats MC in retrofits of places open for business since you can assemble it stick by stick. It also beats MC in dead straight runs with multiple round robins. Yet I've seen this ignored time and again.
We all have our habits and ways of thinking.
Also bus duct is a little bit more of a lead time item. I think it's coming cross country. Not installing it makes all feeders pure bread and butter and no one loses their job.
