Men in Holes, Part 793

Well, not 793 exactly, maybe more like 627, but if I see men working in a pit,

 I feel compelled to find out just what they are doing.

Inquiring minds want to know, ya know?

On the same day I watched men bringing old transformers out of a pit, 

I found these men just outside the Scottish Rite Cathedral.

They were working to repair some pipe; one man was welding 

while the others assisted to maneuver the pipe,

hold it in place, measure, cut and to assist with assisting.
(They all had some assigned task, really, just that as their role
was completed, they moved to helping out the others.) 

You've seen those bright red tool boxes on wheels? 

Like the ones race teams have in their trackside pit boxes?

Well, the rolling tool box for the welders is shown above.

It is a box truck, containing everything they need 

to dig, cut and weld pipe.