Cleanouts, monument & junction boxes designed for airports, port authorities or other applications requiring excessive load conditions. Cast gray & ductile iron. All sizes and styles availble. Bolted and security options, and slip resistant surfaces available. Send us your specifications or details. Made in USA. Please use the Contact Form or call us to request info & submittal sheets. 1-800-258-2278 Toll Free (972) 263-1360 DFW Local.