Roof installation of hvac units is made easier with new equipment mounting supports, the manufacturer says. The supports have a high-load-bearing capacity achieved by a system of internal bulkheads welded into position at specific intervals along the length of the rails. Three basic styles are offered: TEMS-1, -2, and -3. Standard features include a welded, 18-ga galvanized steel shell, base plate, and counterflashing; factory-installed wood nailer; and mitered end sections (TEMS-1 and -2). Thybar Corp., 913 S. Kay Ave., Addison, IL 60101; 800-666-2872 or 630-543-5300; 630-543-5309 (fax); (e-mail); (Web site).