These are mandatory quality assurance measures required by the International Building Code (IBC) to verify that critical structure elements are fabricated and installed according to approved design documents. Unlike standard municipal building inspections, which are broad and periodic, special inspections are highly technical and often involve continuous monitoring of high-risk tasks such as welding structural steel or pouring reinforced concrete. These inspections are performed by the licensed engineers at WRG Engineering to ensure an unbiased assessment of the work. 

The scope of special inspections is defined by the Structural Engineer of Record (SEOR), who develops a “Statement of Special Inspections” (SSI) during the design phase. This document identifies which components, such as masonry, soils, fireproofing, or seismic reinforcements, require specialized oversight. During construction, the special inspector’s role is to confirm compliance through visual observation and material testing, such as performing concrete slump tests or verifying the torque on high-strength bolts. Any discrepancies between the design and the actual construction must be documented and tracked until they are resolved and verified by the design team. 

Regulatory requirements for these inspections have become increasingly strict, particularly in dense urban environments like New York City, which mandated them for all projects starting in 2008. In these jurisdictions, Special Inspection Agencies must be accredited and registered for specific categories, ranging from structural stability to mechanical systems. The primary goal is to protect public safety by preventing structural failures—such as those caused by incorrect rebar placement or poor weld quality—that could lead to catastrophic collapses. 

By providing an objective “second set of eyes,” special inspections act as a critical safeguard for building owners and the public alike. They ensure that the sophisticated engineering designs intended to resist extreme wind or seismic loads are accurately translated into the final physical structure.