Atlantic Prefab Incorporated of Wilton, New Hampshire specializes in the design and fabrication of prefabricated building com ... ponents & systems. A.P.I.’s product line-up includes: Pre-Engineered Cold-Formed Steel Truss Systems, Exterior Envelope Panels, Pre-Finished Exterior Wall Panels, Load Bearing Wall Panels, and Custom Modular Units such as Cupola’s, Dormers, and more. read more