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Roman and Manual, two Hispanic framers who have been working for BCB Framing for the last three years, are framing the subfloor for the first floor.
Note: The process is as follows: first, using his caulking gun, Manual applies construction adhesive to the top of the floor joists; second, Manual and Roman line up and place a piece of 3/4 inch plywood on the joists; and finally, Roman nails the plywood to the joists using his pneumatic nail gun.

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Roman employs his pneumatic nail gun to nail down the plywood subfloor.
Building note: "It may take 20,000 to 30,000 nails just to sheath an average house. Add to that the nails needed for framing, roofing, and shingling, and you can begin to imagine the number of hammer strokes required. Pneumatic nailers, commonly called nail guns, can reduce those strokes to a small fraction.
Control of the workpiece is the other big advantage of these nailers -- with a hammer and nail, you need one hand for each. A pneumatic nailer delivers the nails, giving you a free hand to hold a stud or top plate in place. The nail goes in quickly without requiring hammer blows that cause the wood to 'drift.'. .
These nailers are powered by air hoses running to a compressor and calibrated by a pressure adjustment on the nailer." (Michael Litchfield. Renovation. Taunton Press: 2005. pagees 45-46)

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8D ring shank vinyl coated gun nails that are 2 and 3/8 inches long and 0.12 inches in diameter
Building notes: Along with the construction adhesive, this product will ensure that the plywood subfloor is firmly attached to the floor joists in the crawl space. The fact that the nails are shaped with a ring shank means that the nails "resist movement and popping, therefore making them ideal for decks and siding because changes in wood moisture can reduce the friction between wood fibers and straight shanks. . .Generally, length should be about three times the thickness of the piece being nailed down [e.g. 3/4 inch plywood needs a nail 2 and 1/4 inches long]." (Ibid, pages 57, 58)

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Manual is using a hammer to nail down some plywood.
Note: I was fortunate to see workers at the job site tonight. Usually by the time I reach the site after work, the construction workers have finished their jobs for the day and are gone.

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Dusk at the job site (5:48 PM)
Note: Sunset is 6:09 PM tonight.
Note: All of these pictures were taken on October 22, 2009 at the site of our future home.