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OK, looks like 500KW generators on sale on eBay, used and wide spread in pricing, but useful, nonetheless.

Great, thanks! Looks like a 500KW generator runs $1K/day. Any chance you have a similar source for the cost of purchasing a 500KW generator outright? I'm not going to have access to my Means books for a while, away from work.

About what size generator can be leased for $1000/day? Let's say 460V, details are not important. And about how much would that same generator cost if purchased outright? Very rough numbers are fine, just trying to get a feel for the order of magnitude.

Here is a bit more info. We have actual steam consumption data for the building going back many years. We have picked a representative year to base our comparison on, HDD data for the year looks in-line with the past 10 year average, we have month to month data. Both the district steam...

I'm working on a $4M boiler install for a federal building. The building currently purchases district steam. Savings for self-generation are substantial. I've a good handle on the costs and savings involved and have arrived at a payback of 10-12 years. Is there guidance, either federal (GSA...

Gentlemen, thanks for the comments. Since last posted, about 10 cubic yards of concrete was poured into a 20" wide, 48" deep trench (footing height of about 30") reinforced with a ladder consisting of #4 bars about 3" off the bottom. A visit by a soils engineer was required...

I am building a one story residential 20'x20' addition in Northern Virginia. The soil is very poor, very expansive clay. The permit office is requiring a 4' footing depth in lieu of the 2' typical in these areas. My footing will be poured reinforce concrete (8"x16") and I will have...