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Josh... it appears that coal and gas make up for twice the energy production as all the other methods.

Donut Lab "Technology company Donut Lab has created a range of doughnut-shaped motors that fit directly inside a vehicle's wheels and enhance performance by removing the need for traditional powertrain systems. The circular motors form part of a modular platform of components created by Donut...

Their rate of use is decreasing and they are using more and more renewables. The US carbon footprint (all fossil fuels are not good) on a per capita basis is twice that of China.

I thought his explanation was plausible... they appear to be actuators as 3DD noted.

Excellent guide.

See how China is advancing in renewables... and cutting back on coal.

Great program... I've been using it for nearly 20 years... as good as AutoCAD, at the price of Autocad LT.

You need a wooden mallet, else you will deform the steel. The job gets trickier.

I use a modified AIA naming scheme...

Maybe not... heat goes up and surrounding earth may protect the foundations.

The fire moves to the existing building?

The firewall has to remain intact to prevent the passage of fire. Either half of the building may have the fire.

Concrete is concrete... it doesn't matter what the project is.

I remember as a kid (before teens), seeing the burned warehouse across the street from my grandparents place. The beams were draped over the columns and some of the columns had collapsed. I don't recall what happened to the OPSJs. I was amazed at the sight.

Spagetti beams look so neat... If the structure has not deformed, it is likely OK. Take some coupons and do some tests to confirm.

Yes they can. If there has been a few days since the concrete has been cast, the location of the shrinkage cracks has likely been determined. Micro cracking has already occurred. You may have cracking occur between the new installed joints. You often find cracks form near sawcut joints...

It requires lateral support in the event either half of the building burns down.

Not likely, if it's a code requirement. This is a life safety issue. The firewall has to stand independent of either part of the two buildings.

Thanks... interesting thread.