Pennsy is South Central Pennsylvania's leading supplier of aggregate, concrete and asphalt.

• See also:
• Masterformat 2004
• 28 10 00 - ELECTRONIC ACCESS CONTROL AND INTRUSION DETECTION
• 28 13 00 - Access Control
• 28 13 53 - Security Access Detection
• 28 16 00 - Intrusion Detection
• 28 20 00 - ELECTRONIC SURVEILLANCE
• 28 23 00 - Video Surveillance
• Masterformat 1995
• 13700 - Security Access & Surveillance