Commercial Steel Roll Up Greenhouse Door 3652 is our new nylon windlock certified wind load rated roll-up sheet door. The nylon windlock will offer an easier installation process with a more forgiving guide set, as well as a smoother and quieter operation. Most parts come pre-assembled, ensuring that installation is quick and easy. This greenhouse or commercial building door is made of durable, long-lasting materials, making it ideal for retail applications, commercial and industrial properties, and warehouses in high wind areas. • Designed and tested to meet wind load requirements of the International Building Code and Florida Building Code (FL14425) • Utilizes a 12” drum wheel • The maximum opening size of 18’ wide x 20 ’ high (360 sq.ft.) • Push-up, hand chain, and electric operations • PSF Ratings: +36 PSF and -40 PSF for opening widths of 12’ • Ratings vary for other opening widths; consult the factory