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This site consists of several tools and documents that may be used by engineers for designing environments suited for human operations.

You can access the main pages by using the hyperlinks at the left. Within each page, there are options for viewing more detailed information on various subjects. You can move around within a page and between pages by clicking on the underlined hyperlinks provided. Some pages use a series of letters or numbers as hyperlinks to allow you to move throughout the page quickly.

A valid email account is necessary to submit technical comments. All comments are welcome and the document editor will contact you to discuss changes, if desired.

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Please contact Email HEFD if you need further assistance