Introductory technical guidance for professional engineers and others interested in security standards for buildings. Here is what is discussed:1. INTRODUCTION2. STANDARD 1. STANDOFF DISTANCE3. STANDARD 2. UNOBSTRUCTED SPACE4. STANDARD 3. DRIVE-UP/DROP-OFF AREAS5. STANDARD 4. ACCESS ROADS6. STANDARD 5. PARKING BENEATH BUILDINGS OR ON ROOFTOPS7. STANDARD 6. PROGRESSIVE COLLAPSE RESISTANCE8. STANDARD 7. STRUCTURAL ISOLATION9. STANDARD 8. BUILDING OVERHANGS AND BREEZEWAYS10. STANDARD 9. EXTERIOR MASONRY WALLS11. STANDARD 10. GLAZING12. STANDARD 11. BUILDING ENTRANCE LAYOUT13. STANDARD 12. EXTERIOR DOORS14. STANDARD 13. MAIL ROOMS AND LOADING DOCKS15. STANDARD 14. ROOF ACCESS16. STANDARD 15. OVERHEAD MOUNTED ARCHITECTURAL FEATURES17. STANDARD 16. AIR INTAKES18. STANDARD 17. MAIL ROOM AND LOADING DOCK VENTILATION19. STANDARD 18. EMERGENCY AIR DISTRIBUTION SHUTOFF20. STANDARD 19. EQUIPMENT BRACING21. STANDARD 20. UNDER BUILDING ACCESS22. STANDARD 21. MASS NOTIFICATION.