Coverage Map & Exam Overview
Key Takeaways
Candidates see 125 items: 115 scored questions plus 10 unidentified pretest items, with 330 minutes and an exact passing standard of 81 scored answers.
The current PSI bulletin lists 24 reference entries and supplies a separate physical diagram or blueprint packet onsite.
Listed code editions control; candidates using earlier or later non-code editions do so at their own risk and cannot appeal resulting conflicts.
PSI publishes exact counts for 12 subject areas but no detailed task-level blueprint or OSHA-specific weight.
Twenty agencies across 17 states and the U.S. Virgin Islands accept the result as a trade-exam waiver, not a contractor license.
How to Use This Guide for the NASCLA Accredited Exam
The NASCLA Accredited Examination for Commercial General Building Contractors is a standardized trade examination. As of August 24, 2026, 20 agencies across 17 states and the U.S. Virgin Islands accept it in place of their own trade examination. A passing result can be sent through the NASCLA National Examination Database, but it is not a license, certification, or automatic reciprocity. Each agency determines the applicable classification and every remaining licensing requirement.
Exam Format and Logistics
The exam is open book and administered by PSI at testing centers. Candidates see 125 items: 115 scored questions and 10 unidentified, unscored pretest items. The 330-minute limit includes all displayed items, and the exact passing standard is 81 of the 115 scored questions. The current bulletin lists 24 approved reference entries and supplies a separate physical diagram or blueprint packet onsite. PSI permits highlighting, underlining, indexing, and permanent tabs; references must otherwise be unmarked and contain no extra papers or temporary tabs.
Official 12-Area Content Outline
PSI publishes exact scored-item counts, not narrower task-level weights.
| Official subject area | Scored items |
|---|---|
| Procurement and Contracting Requirements | 31 |
| General Requirements | 25 |
| Site Construction | 15 |
| Concrete | 6 |
| Metals | 6 |
| Mechanical and Plumbing Systems | 6 |
| Wood | 5 |
| Thermal and Moisture Protection | 5 |
| Finishes | 5 |
| Doors, Windows, and Glazing | 4 |
| Masonry | 4 |
| Electrical Systems | 3 |
These total 115 scored questions. Any finer grouping used elsewhere in this guide is an editorial study aid, not an official NASCLA blueprint or guaranteed question distribution.
Trade-Exam Waiver Limits — Read This Carefully
The NASCLA result addresses only the participating agency's trade-exam requirement for an accepted commercial general building classification or similar classification. It does not establish a uniform scope of work, waive every business-and-law or specialty examination, or award a license. Confirm the exact classification and all experience, financial, insurance, bonding, background, and other requirements directly with the target agency rather than treating one state's rules as national.
Recommended Study Sequence
A defensible editorial sequence starts with the three largest official areas: Procurement and Contracting Requirements (31 scored items), General Requirements (25), and Site Construction (15). Then cover every remaining official area without inventing task-level weights. Practice navigating all 24 listed reference entries under time, but do not assume that a useful construction standard is an approved exam reference unless it appears in the current PSI bulletin.
Open-Book Discipline and Trap Awareness
Three habits support efficient open-book work. First, answer the reasoning questions from knowledge and reserve look-ups for numeric code values; flipping pages for every item burns the clock. Second, watch the qualifier words — EXCEPT, NOT, LEAST, FIRST, and minimum/maximum flip the correct answer and can reverse the correct answer.
Third, when a question gives units, convert before you compute (inches to feet, square feet to squares, cubic feet to cubic yards) — most numeric traps are unit-mismatch distractors, not arithmetic errors. Each chapter that follows flags its specific traps in a Editorial Practice Checks aid so you can drill them deliberately.
What Each Chapter Section Delivers
The remaining chapters are a local editorial construction-study framework. Some sections cite transferable authorities or standards that are not among PSI's 24 approved reference entries; those citations support instruction but do not expand the official exam reference list or blueprint. Use the current PSI bulletin for exam scope and permitted materials, and use local quizzes only as original practice rather than as predictions of live questions.
Sections you finish are checked off in the contents.