ICC S1 Structural Steel and Bolting

ICC Structural Steel and Bolting (S1) Certification Exam

More study resources

About this exam

The ICC Structural Steel and Bolting (S1) certification is a specialty credential for inspectors and plans examiners who evaluate structural steel construction. It sits alongside the general building and framing certifications and signals that a candidate can check steel work against the adopted code, the approved construction documents, and the referenced standards that govern fabrication, bolting, welding, and erection.

The exam is aimed at special inspectors, third-party quality assurance personnel, building department inspectors, plans examiners, and engineers who review or witness steel construction. Candidates are expected to move comfortably along the adoption chain: IBC provisions on structural steel and special inspection, AISC 360 and the Code of Standard Practice, the RCSC Specification for bolted joints, AWS D1.1 for welded work, and the ASTM product specifications behind fasteners and structural shapes.

Roughly a third of the content sits in bolted and welded connections, so joint detailing, fastener installation, snugging and pretensioning methods, welder qualification, and weld examination deserve disproportionate preparation time.

The exam is open book, so candidates bring tabbed code references and need to know where a requirement lives rather than recite it from memory. The most reliable preparation is a structured read of each referenced standard combined with practice on scenario questions that blend code administration with field inspection judgment. Confirm all current administrative details with ICC directly.

What you'll study

Common questions

About ICC S1 Structural Steel and Bolting preparation

Is the exam open book?

Yes. Code references may be used during the exam, which means success depends heavily on navigation speed: tabbed, annotated copies of AISC 360, the RCSC Specification, AWS D1.1, and the IBC. Unfamiliar books cost more time than gaps in knowledge do. Check ICC's candidate handbook for exactly which materials are permitted and how they may be marked up.

How difficult is the exam?

Moderately hard for generalists. People who routinely inspect bolted and welded connections find those sections straightforward; candidates from a general building background tend to lose points on pretensioning methods, welder qualification, and nondestructive testing acceptance criteria. The open-book format rewards candidates who have practiced locating requirements quickly over those who tried to memorize prose.

What score do I need to pass, and how long is the exam?

ICC sets and publishes the current passing score, item count, and time allowance in its candidate handbook and on its website. Those figures are revised periodically and should never be taken from secondhand sources or study guides. Check iccsafe.org for the current certification exam details before you schedule a sitting.

Can I retake the exam, and how soon?

ICC publishes its retake and waiting-period policy alongside the exam listing, and the terms can change. Practically, review your score report for weak domains before rebooking rather than retesting immediately. Candidates who rebuild their reference tabs around the low-scoring domains usually see the largest improvement on a second attempt.

What should I study first?

Start with the adoption chain: the IBC chapters on structural steel and special inspection, then AISC 360, then the Code of Standard Practice. Add the RCSC bolted joint specification and AWS D1.1 only after that framework is clear. The standards are far easier to absorb once you know where each one fits in the hierarchy.

Where do candidates lose the most points?

Bolted connections. Distinguishing snug-tight, pretensioned, and slip-critical joints, knowing the turn-of-nut, calibrated wrench, twist-off, and direct tension indicator methods, and matching each to its inspection sampling is where scores fall. Weld losses cluster around welder qualification, WPS and PQR review, and acceptance criteria for visual and nondestructive examination.

Do I need field experience to sit for the exam?

Eligibility requirements are published by ICC with the exam listing, so confirm them there. Beyond paperwork, the questions read like an inspector's day. Anyone who has witnessed pretensioning or reviewed a welding procedure specification will recognize the scenario phrasing quickly. Field exposure helps most in the erection, alignment, and documentation domains.

Which references should I bring?

At minimum: the IBC, AISC 360, the AISC Code of Standard Practice, the RCSC Specification, AWS D1.1, and the ASTM fastener standards, noting that A325 and A490 have been consolidated under ASTM F3125. Bring the editions your jurisdiction actually adopts, since question wording follows the referenced edition. Confirm permitted materials with ICC before test day.

Is S1 the same as a general building inspector certification?

No. It is a specialty credential limited to steel fabrication, bolting, welding, erection, and the inspection and documentation duties that go with them. Many inspectors hold a general building or commercial combination certification plus one or more specialty endorsements. S1 does not cover the broader scope of a full building inspection certification.