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Building Development Division
When are Special Inspection Applications Applicable?


The Special Inspections Program requirements, outlined in the Prince William County Special Inspections Manual (SIM), shall apply to the following structures and/or structural elements, submitted in the Statement of Special Inspections by the appropriate Registered Design Professional of Record (RDPR), or specified in BDD Policy 1.18 for minor critical projects, and/or, when so required by the Building Official:

  • All high-rise buildings, as defined by the most current County-adopted IBC
  • Construction requiring installation of deep foundations, helical pile foundations (helical piers), vertical masonry foundation elements (foundation piers)
  • All pre-stressed concrete elements of buildings and structures, regardless of their size
  • All precast concrete structural members and tilt-up concrete panels
  • All structural steel framed buildings which include any of the following:
  • Field welded, bolted rigid or semi-rigid connections for the purpose of stability or resistance to lateral loads
  • Bolted or welded stability bracing
  • Bolted connections that require a minimum pretension to be achieved
  • Clear spans of over 50 feet
  • Structural steel trusses or joists other than those of SJI specification
  • Plate girders of any span
  • Space frames with clear spans of more than 35 feet
  • Cable supported structures
  • Open-web steel-joists and joist-girders (including those manufactured to SJI specifications)
  • Steel floor and roof decks
  • Field-welded shear studs
  • Cold formed light gage steel primary structural members, e.g. in roof trusses and walls, temporary and permanent bracing details for roof trusses spanning 60 feet or greater.
  • All masonry designed in accordance with ACI 530 /ASCE 5 and ACI 530.1 / ASCE 6 that is used as a structural member and fire rated assembly; (e.g. all load bearing masonry, non-load bearing vertical shaft enclosures, other non-load bearing grouted walls etc.) – See exceptions in IBC
  • Elevators, Dumbwaiters, and Conveyor Equipment (Not Special Inspections items. Require mechanical third party inspections.)
  • Excavations that require structural support (refer to Chapter 10 - sheeting and shoring, for design and document submission requirements)
  • All retaining wall systems with unbalanced fill height:
  • Greater than eight feet
  • Between four and eight feet, with surcharge either from an adjacent structure or from a slope steeper than 3H:1V
  • Wood Construction (e.g. fabrication of high-load diaphragm, metal-plate connected wood trusses spanning 60 feet and greater, etc.)
  • Exterior Insulation and Finish System (EIFS) including water-resistive barrier coating – See exceptions in Chapter 22
  • Sprayed Fire Resistant Material
  • Mastic and Intumescent Fire-resistant Coatings
  • Smoke Control Systems
  • Special Cases - when determined by the Building Official


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