Modular Security Systems Inc. turns ISO shipping containers and turnstiles into Patented Modular Access Control (MAC) Portals for perimeter security minded customers all around the world. MSSI has used turnstiles from a wide range of turnstile manufacturers from Alvarado to Boon Edam, and Controlled Access to name a few. In the process of building customer specified MAC Portals MSSI has used half-height turnstiles, single full height turnstiles, tandem turnstiles, and even turnstiles with metal detection for some nuclear facilities in the United States. This week MSSI will be delivering two MAC-8 (MAC Portal with eight turnstile lanes) units that utilize four sets of tandem turnstiles and an optional floor plan. The guard office in the MAC-8 (pictured above) has been moved to the end of the container as opposed to being located in the center of the unit.