Found this, hope it helps:
(NOTE: have not read it all the way through yet) -That said, I have been thinking the same thing - there’s a simple solution to this problem but it would entail changing “the way we’ve always done it” mentality.
I think what must be done is to convince the owner(private project) to REQUIRE gc’s/subs to procure from one source. Source would be onsite distributing products & managing inventory. They could track EVERYTHING if they have a large fleet & the technology/capacity to store inventory.
You don’t even need to cut out preferred distributors(subs go-to distributor) - all that needs to be done is take deliveries(by each subs preferred distributor) and individual trips to box stores/similar out of the installers hands.
Unfortunately, doing this would likely speed things up, ensure only approved materials were used(not to mention could be tracked if material failed) & save everyone involved a ton of $… Forgot to mention greatly reduce unnecessary carbon emissions from transportation.
It would make everyone’s life easier & less stressful… But what’s the fun in that, I mean look how well “the way it’s always been done” is working out for us…
Sorry for the rant; this is easier said than done & i do understand the factors at play; regardless of how easily they can be overcome.
EOD I think assumption is transportation is 6% of embodied emissions(carbon). Then again, depends on who you ask & future technology they’re accounting for in calculations.
Happy holidays & I hope this helps!