This company's roof hatches were designed to provide fast, safe access to roofs for equipment maintenance. The roof hatches include a hold open arm that automatically locks and holds the hatch open, even in severe wind conditions. The hatches are easy to install and come in three standard sizes. Custom sizes are also available. material options include galvanized steel covers and curbs, aluminum covers and curbs and more.

Thybar Corp., 913 South Kay Avenue, Addison, IL 60101; 800/666-CURB; fax 630/543-5309; www.thybar.com.

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