What Is the Arizona KB-2 License?

KB-2 stands for Dual Residential and Small Commercial.

The classification combines the scope of Arizona's B General Residential Contractor license with the B-2 General Small Commercial Contractor license.

That gives the KB-2 contractor authority to work within both qualifying residential construction and qualifying small commercial construction.

The B-2 commercial portion currently applies to projects of $2,000,000 or less, including labor and materials.

Review the Arizona Registrar of Contractors license classifications before applying to make sure KB-2 matches the work your business plans to perform.

Step 1: Know the KB-2 Experience and Exam Requirements

Arizona currently lists KB-2 as requiring four years of qualifying hands-on and/or managerial experience.

The classification also lists:

• The Arizona Statutes and Rules Exam, or SRE.
• The applicable trade examination.

Exam waivers may apply in specific situations, so always confirm your individual requirements with the Arizona Registrar of Contractors.

The qualifying party is the individual who satisfies the applicable experience and examination requirements for the contractor license.

Passing an exam without meeting the other licensing requirements is a little like finishing the roof before anyone built the walls. Impressive effort, wrong order.

Step 2: Understand the KB-2 Trade Exam Numbers

PSI may also include a small number of experimental questions that are not scored but still use examination time.

Four hours sounds generous until you are halfway through the exam and one masonry question has convinced you to read an entire chapter.

Knowing your references before test day is essential.

Step 3: Learn the KB-2 Exam Breakdown

The current PSI content outline divides the 100 scored questions into ten subject areas.

One of the biggest lessons from this outline is that KB-2 is a true general-building exam.

There is no single section worth half the test. You need broad construction knowledge and a study plan that touches the entire building.

Step 4: Make Concrete One of Your Biggest Priorities

Concrete is the largest individual category with 14 questions.

Review:

• Concrete materials.
• Mixing and placement.
• Footings.
• Foundations.
• Slabs.
• Forms.
• Reinforcing steel.
• Joints.
• Finishing.
• Curing.
• Concrete quantities.
• Basic concrete inspection concepts.

Practice calculating volume and converting cubic feet to cubic yards.

Also become comfortable finding concrete requirements inside both residential and commercial building-code references.

Step 5: Study Metals and Structural Steel

Metals contributes 13 questions, making it the second-largest category.

Review topics involving:

• Structural steel.
• Steel framing.
• Joists.
• Joist girders.
• Connections.
• Bolts.
• Welding concepts.
• Metal decking.
• Steel erection.
• Handling and installation.

This can be an uncomfortable section for contractors whose background is mostly residential wood framing.

If metals is not part of your everyday work, give it extra study time instead of hoping all 13 questions develop a sudden interest in lumber.

Step 6: Build Strong Carpentry Knowledge

Carpentry accounts for 12 questions.

Study:

• Wall framing.
• Floor framing.
• Roof framing.
• Joists.
• Rafters.
• Beams.
• Headers.
• Sheathing.
• Fastening.
• Wood construction.
• Stairs.
• Framing calculations.

Learn how to use span tables, fastening tables, and the building-code index efficiently.

Carpentry questions may involve both field knowledge and code requirements, so practice moving between practical construction concepts and the exact rule in your reference.

Step 7: Take the Safety Section Seriously

Safety also contributes 12 questions.

That makes OSHA one of the four largest exam categories.

Review:

• Fall protection.
• Scaffolds.
• Ladders.
• Excavations and trenches.
• Personal protective equipment.
• Electrical hazards.
• Material handling.
• Tools and equipment.
• Steel erection safety.
• Concrete construction safety.
• Housekeeping.
• Jobsite access.

OSHA questions often depend on an exact distance, height, procedure, or protective requirement.

Learn how to find those numbers instead of trusting the part of your memory where jobsite safety meetings go to retire.

Step 8: Review Masonry

Masonry accounts for 10 questions.

Study:

• Concrete masonry units.
• Brick.
• Mortar.
• Grout.
• Reinforcement.
• Lintels.
• Flashing.
• Bond patterns.
• Wall construction.
• Masonry terminology.

Understand both the materials and how masonry assemblies are constructed.

Pay attention to code requirements affecting structural masonry, wall support, reinforcement, and weather protection.

Step 9: Study Thermal and Moisture Protection

Thermal and Moisture Protection provides another 10 questions.

Review:

• Roofing systems.
• Flashing.
• Waterproofing.
• Dampproofing.
• Insulation.
• Vapor-control concepts.
• Weather barriers.
• Sealants.
• Building-envelope protection.
• Roof drainage concepts.

Water has an impressive talent for finding the one construction detail nobody paid enough attention to.

Study how the building envelope works as a system, not simply as a collection of products.

Step 10: Review Sitework

Sitework contributes nine questions.

Review:

• Site layout.
• Excavation.
• Grading.
• Backfill.
• Compaction.
• Drainage.
• Trenching.
• Utilities.
• Soil-related concepts.
• Site measurements.

Sitework questions can involve both practical construction knowledge and calculations.

Practice reading dimensions, grades, slopes, and quantities without losing track of units.

Step 11: Learn the General Building Code

General Building Code accounts for nine questions.

KB-2 is a dual classification, so candidates should be comfortable navigating both residential and commercial building-code requirements.

Study topics such as:

• Occupancy concepts.
• Building limitations.
• Means of egress.
• Fire-resistant construction.
• Interior construction.
• Structural requirements.
• Residential provisions.
• Stairs.
• Guards and handrails.
• General code organization.

Do not try to memorize both code books from front cover to back cover.

Learn the table of contents, index, chapter structure, and the sections that appear repeatedly during practice.

Step 12: Do Not Ignore Doors, Windows, and Finishes

Doors and Windows contains five questions, while Finishes contains six.

Together, that is 11% of the test.

Review doors and windows involving:

• Rough openings.
• Door types.
• Window installation.
• Flashing.
• Weather protection.
• Hardware concepts.

For finishes, review subjects such as:

• Gypsum board.
• Interior wall finishes.
• Floor finishes.
• Ceiling finishes.
• Painting and coatings concepts.
• Finish installation practices.

Smaller categories are often where prepared candidates pick up useful points.

Step 13: Get the Correct KB-2 Exam References

The current PSI KB-2 trade outline identifies three primary references that are allowed in the examination center:

• Code of Federal Regulations, 29 CFR Part 1926 OSHA, with the latest available amendments, or the applicable PSI selections.
• International Residential Code for One- and Two-Family Dwellings, 2018 Edition.
• International Building Code, 2018 Edition.

Before ordering references, review the Arizona contractor exam preparation resources from Contractor Exam Preps and compare your materials with PSI's latest KB-2 outline.

Step 14: Know the Study-Only References

PSI also identifies several references used to prepare questions that are not permitted inside the examination center.

The current list includes:

• Design and Control of Concrete Mixtures.
• Pipe and Excavation Contracting.
• Handling and Erection of Steel Joists and Joist Girders.
• Carpentry and Building Construction.
• Modern Masonry - Brick, Block, Stone.

These books can still be extremely useful during preparation.

The important distinction is that a book can help PSI develop trade questions without being approved for use during your actual examination.

Step 15: Prepare Approved References Correctly

PSI currently permits approved references to be prepared before the exam.

References may be:

• Highlighted.
• Underlined.
• Annotated.
• Indexed.
• Tabbed using permanent tabs.

PSI defines permanent tabs as tabs that would tear the page if removed.

Temporary tabs such as Post-it notes or removable page markers are not allowed.

Candidates also may not bring unauthorized loose or attached papers with their references.

If you print an approved reference from the internet, it must be properly bound, such as spiral bound or hole punched and placed in a binder.

Prepare everything before test day. Four hours is plenty of time for an exam and absolutely no time for arts and crafts with sticky tabs.

Step 16: Learn Which Book to Open First

With a large general-building exam, reference selection is just as important as reference navigation.

Build a simple mental system:

• OSHA: worker safety, ladders, scaffolds, trenches, fall protection, tools, and jobsite hazards.
• IRC: residential construction requirements.
• IBC: commercial construction and general building-code requirements.
• Study-only trade books: reinforce concrete, excavation, steel, carpentry, and masonry knowledge before exam day.

When you read a practice question, identify the category first.

Then decide which reference has the best chance of containing the answer.

Opening the right book in five seconds is much better than spending a minute interviewing all three.

Step 17: Consider the NASCLA Exam Alternative

Arizona currently allows applicants for the KB-2 Dual Residential and Small Commercial classification to use the NASCLA Accredited Examination for Commercial General Building Contractors in place of the Arizona ROC trade exam when applicable.

That can be worth considering if you plan to pursue contractor licensing in other jurisdictions that also accept NASCLA examination results.

However, the NASCLA exam has its own content structure, approved reference list, registration process, fees, and testing requirements.

Do not switch exam paths simply because somebody said NASCLA is "better."

Compare both exams and choose the path that fits your licensing plans and study situation.

Step 18: Use a Six-Week KB-2 Study Plan

Adjust your schedule based on experience.

A residential builder may need extra work on structural steel and commercial code. A commercial superintendent may need more focused residential-code practice.

Step 19: Practice Under the Real Four-Hour Limit

Full-length practice matters for a 100-question exam.

Set a timer for 240 minutes and work through 100 questions.

Use a three-pass strategy:

1. First pass: Answer questions you know immediately.
2. Second pass: Handle straightforward reference lookups.
3. Third pass: Work through calculations and difficult code questions.

Avoid spending ten minutes on one question early in the test.

With 100 questions available, there are probably several easier points waiting for you farther down the screen.

Step 20: Practice Construction Math

General-building exams can require practical construction calculations.

Review:

• Area.
• Volume.
• Cubic yards.
• Linear measurements.
• Fractions and decimals.
• Roof slope.
• Material quantities.
• Excavation quantities.
• Concrete calculations.
• Basic estimating.

PSI currently allows a basic, silent, nonprinting, non-programmable, non-scientific calculator.

Practice with that style of calculator so exam day does not begin with you discovering that your favorite calculator has too many buttons.

Step 21: Watch the Wording of Every Question

Carefully read words such as:

• MINIMUM
• MAXIMUM
• MOST
• LEAST
• FIRST
• NOT
• EXCEPT
• REQUIRED
• PROHIBITED

Contractor exam answers are often designed to be close enough to make you uncomfortable.

Read the exact question, identify the controlling subject, and use the reference when necessary.

Step 22: Know the Current PSI Retake Rules

Current PSI rules require candidates to wait 30 days before retaking an examination they did not pass.

Candidates are allowed three attempts. After three failed attempts, a 90-day waiting period applies before retaking the examination.

PSI provides diagnostic information after an unsuccessful attempt showing areas of strength and weakness.

Use it.

If Metals was your weak category, study Metals. Spending another week answering carpentry questions you already know is not fixing the problem, even if your practice score looks beautiful.

Step 23: Remember the Arizona Statutes and Rules Exam

KB-2 applicants may also need to complete the Arizona Statutes and Rules Exam, commonly called the SRE.

The SRE is a computer-based training course and examination maintained by the Arizona Registrar of Contractors.

It covers Arizona contractor statutes and rules rather than general building trade knowledge.

Current examination information lists the SRE fee at $61 and one PSI trade examination at $66.

Because waivers may apply in some situations, confirm your exact requirements before paying for examinations.

Review the Arizona ROC contractor licensing process for current application information.

Step 24: Passing the Exam Is Only Part of Getting Licensed

Passing the KB-2 trade examination is a major milestone, but PSI does not issue your contractor license.

The Arizona licensing process can also include:

• Choosing the correct classification.
• Designating a qualifying party.
• Documenting qualifying experience.
• Completing required examinations or obtaining an approved waiver.
• Completing required background checks.
• Obtaining the appropriate contractor license bond.
• Providing identification and business information.
• Submitting the Arizona ROC application.
• Paying applicable licensing fees.

Current PSI instructions state that applicants should complete all examination requirements and submit their license application and original score report to the Arizona ROC within two years of passing the required examination.

A Simple Arizona KB-2 Exam Roadmap

1. Confirm that KB-2 matches your residential and small-commercial business plans.
2. Verify the current four-year experience requirement.
3. Determine whether any exam waiver applies.
4. Decide whether the Arizona trade exam or NASCLA path makes the most sense for you.
5. Complete or plan for the Arizona SRE.
6. Download the latest PSI KB-2 trade outline.
7. Obtain the correct 2018 IBC and IRC references plus OSHA.
8. Prepare approved books with permanent tabs and highlighting.
9. Study Concrete and Metals heavily.
10. Build strong Carpentry knowledge.
11. Give OSHA Safety serious attention.
12. Study Masonry and Thermal and Moisture Protection.
13. Review Sitework and General Building Code.
14. Do not ignore Doors, Windows, and Finishes.
15. Practice construction math.
16. Learn which reference should answer each type of question.
17. Practice rapid IBC, IRC, and OSHA lookups.
18. Complete full 240-minute practice examinations.
19. Review every missed question by subject area.
20. Confirm PSI test-day rules before your appointment.
21. Complete the Arizona ROC licensing application after satisfying all requirements.

Arizona KB-2 Contractor Exam Prep Resources

The KB-2 exam is broad, but the official outline tells you exactly how to organize your preparation.

Concrete, Metals, Carpentry, and Safety are the four largest sections. Masonry and Thermal and Moisture Protection follow closely behind. Sitework, General Building Code, Doors and Windows, and Finishes complete the exam.

The goal is not to become an encyclopedia. It is to develop strong general-building knowledge and learn how to find exact information in your approved references quickly.

When you are ready to prepare, explore the Arizona KB-2 contractor exam preparation resources from Contractor Exam Preps. Strong general-building knowledge, organized references, fast code navigation, and repeated timed practice can make the Arizona Dual Residential and Small Commercial Contractor exam much easier to manage.