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Allen Face has been writing articles for the industries informational resource Concrete Construction since 1982. Please visit their website to browse through his articles as well as a trove of other useful information.

For your convenience, we have provided a summary and links to several of his articles here for you as well.

 

F-min Numbers, Part 1

Published Sept 29, 2011

Updates
The roots of the modern high-density warehouse can be traced back to the invention of the narrow-aisle turret truck. Rather than having to turn to point its forks into the racks like a standard lift truck, the turret truck always faces down the aisle and only uses its pivoting and extending forks to reach into the racks. The resulting economies of motion and space increase storage and retrieval rates (pallets per truck per hour) dramatically, and because the aisle widths are much smaller (6 versus 12 feet), the critical ratio of rack volume to building volume goes up by nearly half. The racks also can be much taller, and because the trucks must be steered by rails or guide wires, the safety and orderliness of the entire operation is greatly improved.

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F-min Numbers, Part 2

Published Nov 4, 2011

Updates
As discussed in last month’s column, my father Sam and I were outsiders to the slab installation business; concrete floors just happened to be the surfaces we coated and topped with plastic (thin polymer overlays). However, we asked ourselves: what’s missing? Cement masons had been placing and finishing concrete floors for a century, so why hadn’t someone already figured out how to make them flat, no less superflat?

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F-min Numbers, Part 3

Published Dec 5, 2011

Updates
The first narrow-strip superflat concrete floor was installed in 1976 by Armando (Sil) Silvestri, of Duron Ontario Ltd., Mississauga, Ontario, Canada, in a new 60,000-square-foot high-bay warehouse being built at the Bruce Nuclear Generating Station on Lake Huron. As soon as each new strip was finished, Sam Face would erect level taut wires next to the future turret truck wheel tracks and measure their profiles using the original profileograph. The resulting paper “EKG” tapes were then couriered back to me in Norfolk to analyze on a light table.

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