Arizona Hardscaping and Irrigation Systems Residential / Commercial Contractor (CR-21) Books Allowed into Exam Package

The Arizona Hardscaping and Irrigation Systems Residential / Commercial Contractor (CR-21) Books Allowed into Exam Package is designed for candidates preparing for the Arizona CR-21 Hardscaping and Irrigation Systems trade exam who need the approved exam-room references in one organized package. This package includes the books provided for this exam-room reference set: Code of Federal Regulations - 29 CFR Part 1926 (OSHA), International Building Code, 2018, and International Residential Code for One- and Two-Family Dwellings, 2018.

The Arizona CR-21 classification is a dual residential and commercial specialty license classification for hardscaping and irrigation systems work. It combines the scopes of the commercial C-21 Hardscaping and Irrigation Systems license and the residential R-21 Hardscaping and Irrigation Systems license. Candidates preparing for this exam should be ready to study irrigation systems, grading and drainage, low voltage electricity, masonry, plastering, concrete, fences and retaining walls, rules and regulations, general knowledge, and safety.

This books allowed into exam package focuses on the references that may be brought into the examination center. Open-book testing does not mean the exam is simple. Candidates still need to understand trade concepts, read exam questions carefully, and know how to find information quickly in the approved references. The exam is timed, so familiarity with the OSHA, IBC, and IRC books can help candidates avoid wasting time searching through unfamiliar material.

The Code of Federal Regulations - 29 CFR Part 1926 (OSHA) supports preparation for construction safety topics that may apply to hardscaping and irrigation work, including excavation, trenching, ladders, tools, personal protective equipment, material handling, and jobsite hazards. The International Building Code, 2018 supports building code navigation for commercial construction topics that may connect to hardscape structures and related work. The International Residential Code for One- and Two-Family Dwellings, 2018 supports preparation for residential code topics connected to exterior work, appurtenances, grading, drainage, and residential construction environments.

Hardscaping and irrigation work often blends practical field knowledge with code and safety awareness. Contractors in this trade may work with non-loadbearing concrete, pavers, gravel, patios, walkways, decorative garden walls, retaining walls, low voltage landscape lighting, water features, backflow prevention devices, trenching, grading, and irrigation systems. A candidate who has field experience should still prepare for exam-style questions, because licensing exams often test terminology, calculations, safety rules, reference navigation, and scope limitations in ways that are different from everyday jobsite conversations.

This package is a practical choice for candidates who want the approved exam-room books for the Arizona CR-21 exam. By studying with the same references allowed into the testing center, candidates can build a stronger exam-day routine, organize the books before testing, and practice locating answers under timed conditions.

Exam Details

The Arizona Hardscaping and Irrigation Systems Residential / Commercial Contractor (CR-21) trade exam is part of the Arizona contractor licensing process. The exam is administered through PSI for the Arizona Registrar of Contractors. The reference material listed for the exam was used to prepare the questions, and the exam may also include questions based on trade knowledge and general industry practices.

The Arizona CR-21 trade exam contains 75 questions. The minimum passing score is 70%, and the time allowed is 180 minutes. Candidates should manage time carefully because the exam includes a wide range of hardscaping, irrigation, construction, code, and safety subjects.

The exam content outline includes the following subject areas:

• Irrigation Systems: 15 items
• Grading and Drainage: 10 items
• Low Voltage Electricity: 10 items
• Masonry: 7 items
• Plastering: 7 items
• Concrete: 7 items
• Fences and Retaining Walls: 6 items
• Rules and Regulations: 5 items
• General Knowledge: 5 items
• Safety: 3 items

For code questions, candidates should use the exact code edition listed for the examination. This package includes the International Building Code, 2018 and the International Residential Code for One- and Two-Family Dwellings, 2018. Safety-related questions may be supported by Code of Federal Regulations - 29 CFR Part 1926 (OSHA), with latest available amendments.

Candidates may use a silent, nonprinting, non-programmable calculator in the examination center. The exam requires both trade knowledge and the ability to use approved references efficiently. Book preparation should be completed before the exam appointment, including permitted highlighting, underlining, annotations, indexing, and permanent tabs.

Open Book Test

The Arizona Hardscaping and Irrigation Systems Residential / Commercial Contractor (CR-21) trade exam is an open-book test with specific rules for approved references. This package includes the books allowed into the examination center for the Arizona CR-21 books allowed into exam package: Code of Federal Regulations - 29 CFR Part 1926 (OSHA), International Building Code, 2018, and International Residential Code for One- and Two-Family Dwellings, 2018.

Candidates are responsible for bringing their own approved references to the examination center. Reference materials may be highlighted, underlined, annotated, and indexed before the examination session. During the examination session, candidates may not write, highlight, underline, or index in the references.

Permanent tabs are allowed. Temporary tabs, including Post-it style tabs or other removable tabs that can be removed without tearing the page, are not allowed and must be removed before the exam begins. Candidates may not bring additional papers, whether loose or attached, with the approved references.

Downloaded reference materials may be brought into the testing center when properly bound. Spiral binding or a hole-punched binder format may be used when permitted by testing rules. Candidates should prepare all references before test day so the exam appointment is focused on answering questions rather than correcting book problems at the testing center.

Open-book preparation should include more than simply marking a few pages. Candidates should learn the structure of each book, review major chapter headings, practice using the table of contents and index, and build a simple tabbing system. The OSHA, IBC, and IRC references are technical books, and the best way to use them during a timed exam is to become familiar with them before test day.

Licensing Steps

Arizona contractor licensing is handled through the Arizona Registrar of Contractors. Candidates pursuing the Arizona CR-21 Hardscaping and Irrigation Systems Residential / Commercial Contractor license should begin by confirming that this classification matches the work they plan to advertise, contract for, supervise, and perform.

The qualifying party is the person who qualifies the license by meeting the knowledge, experience, and examination requirements for the classification. For many applicants, the qualifying party must complete the required trade exam and the Arizona Statutes and Rules requirement unless an approved waiver applies.

Common licensing steps include selecting the correct license classification, identifying the qualifying party, completing the required examination or approved waiver process, meeting the Arizona Statutes and Rules requirement when required, forming or registering the business entity when applicable, obtaining the required bond, completing background checks for required individuals, providing government-issued identification, and submitting the completed license application with required documents and fees.

Applicants using an LLC or corporation should make sure the entity is properly formed or registered before submitting the contractor license application. The legal business name should match across entity records, bond documents, application paperwork, and future advertising. Consistent documentation helps reduce delays during application review.

Passing the trade exam is an important step, but it does not automatically issue the contractor license. Applicants must complete the full Arizona Registrar of Contractors application process and meet all requirements for the classification. Candidates should prepare for the exam while also staying organized with licensing documents, business records, bond information, background checks, and application requirements.

State Requirements

The Arizona CR-21 Hardscaping and Irrigation Systems classification allows the scopes of work permitted by the commercial C-21 Hardscaping and Irrigation Systems and the residential R-21 Hardscaping and Irrigation Systems licenses. It is a dual residential and commercial classification, meaning it is designed for contractors who need authority to perform covered hardscaping and irrigation systems work in both residential and commercial settings within the limits of the classification.

The scope includes installation, alteration, and repair of non-loadbearing concrete; uncovered patios, walkways, and driveways made of brick, stone, pavers, or gravel; wooden decks no higher than 29 inches above finish grade; decorative garden walls up to six feet from finish grade; fences and screens up to six feet from finish grade; retaining walls up to three feet from the finish grade of the lower elevation; and free-standing fire pits, fireplaces, or barbeques when required trade work is subcontracted to properly licensed contractors.

The scope also includes low voltage landscape lighting, water features not attached to swimming pools, irrigation systems, and related work such as 120-volt-or-less electrical wiring, connection to potable water lines, backflow prevention devices, hose bibs, excavating, trenching, boring, backfilling, and grading when necessary for the authorized work. Residential outdoor misting systems not more than 1000 PSI and free-standing, uncovered outdoor kitchens are also included within the listed residential limitations.

The classification has important exclusions. Except for free-standing fire pits, fireplaces, or barbeques, the classification does not allow the licensee to install, contract for, or subcontract new electrical service panels, gas or plumbing lines, blasting, covered outdoor kitchens, gazebos, room additions, swimming pools, pool deck coatings, concrete driveways, load-bearing walls, or perimeter fencing.

Understanding these scope limits is essential. Contractors should use properly licensed subcontractors when work involves electrical, plumbing, gas, or other regulated work outside the authorized CR-21 scope. The license classification should match the work being contracted, advertised, supervised, and performed.

Reference Books

• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  This construction safety reference covers OSHA standards for construction work. It supports preparation for safety topics that may apply to hardscaping and irrigation systems work, including excavation and trenching safety, personal protective equipment, ladders, tools, materials handling, hazard communication, and general jobsite safety requirements.
• International Building Code, 2018
  This building code reference supports preparation for commercial building code navigation and code-related construction topics. For CR-21 candidates, it can help with general code structure, definitions, exterior work considerations, construction materials, retaining wall-related concepts, and other code subjects connected to hardscaping and commercial project environments.
• International Residential Code for One- and Two-Family Dwellings, 2018
  This residential code reference supports preparation for one- and two-family dwelling code topics. It can help candidates study residential construction environments, exterior appurtenances, grading and drainage concepts, decks, walls, safety-related provisions, and residential code navigation.

Exam Room Approved Books

The following books are included in this Arizona Hardscaping and Irrigation Systems Residential / Commercial Contractor (CR-21) Books Allowed into Exam Package and are the exam-room approved references for this package:

• Code of Federal Regulations - 29 CFR Part 1926 (OSHA)
  Allowed exam-room safety reference used for OSHA construction standards and safety-related exam preparation.
• International Building Code, 2018
  Allowed exam-room building code reference used for commercial code navigation and code-related construction preparation.
• International Residential Code for One- and Two-Family Dwellings, 2018
  Allowed exam-room residential code reference used for one- and two-family dwelling code topics and residential construction preparation.

These books should be prepared according to exam rules before test day. Highlighting, underlining, annotations, and indexing may be completed before the exam session. Permanent tabs may be used. Temporary removable tabs, loose notes, and extra attached papers are not allowed. Candidates should keep their references clean, organized, and compliant for inspection at the examination center.

Test Information and Study Materials

The Arizona CR-21 exam covers hardscaping, irrigation systems, code, safety, and general construction knowledge. A strong study plan should follow the exam content outline and give attention to each subject area. Candidates should not focus only on the tasks they perform most often in the field. The exam covers a wider range of topics, including irrigation systems, grading and drainage, low voltage electricity, masonry, plastering, concrete, fences and retaining walls, rules and regulations, general knowledge, and safety.

For irrigation systems, candidates should review water distribution, piping, valves, backflow prevention, sprinkler and drip components, pressure considerations, trenching, connections to potable water lines, hose bibs, controls, and system layout. Irrigation is the largest content area on the exam, so candidates should give it focused study time.

For grading and drainage, candidates should study site slopes, water movement, surface drainage, soil conditions, backfilling, compaction, trenching, and grading practices. Hardscaping work often depends on proper drainage because poor water management can damage pavers, walls, patios, walkways, and planting areas.

For low voltage electricity, candidates should prepare for questions connected to landscape lighting, limited wiring, transformers, controls, safe installation practices, and scope limitations. Candidates should understand when work must remain within the classification limits and when other licensed trades may be required.

For masonry, plastering, and concrete, candidates should review materials, surface preparation, installation practices, finishing, curing, non-loadbearing concrete, decorative walls, paver bases, mortar, stucco-related concepts, and repair methods. These topics are important because hardscaping often includes exterior surfaces, walls, patios, walkways, and related finish work.

For fences and retaining walls, candidates should study height limits, construction methods, drainage behind walls, materials, footing concepts, layout, alignment, and project planning. The CR-21 scope includes specific limits for fences, screens, decorative garden walls, and retaining walls, so candidates should understand both construction methods and classification boundaries.

For rules and regulations, candidates should understand the role of scope limits, subcontracting requirements, and licensing compliance. The exam may include questions that require knowing what work is allowed under the classification and what work must be performed by an appropriately licensed contractor.

For safety, candidates should work directly with OSHA 29 CFR Part 1926. Safety topics may include excavation hazards, trenching, personal protective equipment, tools, ladders, hazard communication, material handling, and jobsite awareness. Hardscaping and irrigation projects often involve digging, heavy materials, cutting tools, compacting equipment, and outdoor site hazards, so safety preparation is important even though the safety category has fewer exam items.

How 1 Exam Prep Helps You Reach Your Goal

1 Exam Prep helps Arizona contractor candidates prepare with organized study guidance, trade-focused review, and practical reference navigation. For the Arizona Hardscaping and Irrigation Systems Residential / Commercial Contractor (CR-21) exam, preparation should be built around the approved references, the exam content outline, and the ability to answer questions under timed conditions.

Open-book exams reward candidates who know how to use their books. 1 Exam Prep encourages candidates to study with the same references they will use on exam day, build familiarity with OSHA, IBC, and IRC materials, and practice locating information quickly. A clear book strategy can help reduce stress and improve pacing during the exam.

Many hardscaping and irrigation contractors bring valuable field experience to the licensing process, but exam questions are not always written like jobsite conversations. Questions may require careful reading, reference navigation, calculation, code lookup, safety standard review, or understanding of classification limits. 1 Exam Prep helps students bridge the gap between real-world hardscaping and irrigation experience and exam-focused preparation.

This books allowed into exam package gives candidates the approved references needed for the Arizona CR-21 exam-room reference set. When combined with consistent study habits, permanent tab preparation, timed lookup practice, and a clear understanding of the licensing process, these references can help candidates move toward their Arizona Hardscaping and Irrigation Systems Residential / Commercial Contractor licensing goal with greater confidence and structure.

FAQ: What books are included in the Arizona CR-21 Books Allowed into Exam Package?

This package includes Code of Federal Regulations - 29 CFR Part 1926 (OSHA), International Building Code, 2018, and International Residential Code for One- and Two-Family Dwellings, 2018.

FAQ: Is the Arizona CR-21 Hardscaping and Irrigation Systems exam open book?

Yes. The Arizona CR-21 trade exam is open book with specific rules for approved references. Candidates must follow the testing rules for highlighting, annotations, indexing, tabs, binding, and prohibited materials.

FAQ: How many questions are on the Arizona CR-21 exam?

The Arizona CR-21 trade exam has 75 questions. The minimum passing score is 70%, and the time allowed is 180 minutes.

FAQ: What topics are covered on the Arizona CR-21 exam?

The exam content outline includes irrigation systems, grading and drainage, low voltage electricity, masonry, plastering, concrete, fences and retaining walls, rules and regulations, general knowledge, and safety.

FAQ: Can I bring loose notes into the exam?

No. Loose papers and additional attached papers are not allowed with the approved references. Book preparation should be completed directly in the approved references before exam day.

FAQ: Are temporary tabs allowed in the exam books?

No. Temporary removable tabs, including Post-it style tabs, are not allowed. Permanent tabs may be used when they are the type that would tear the page if removed.

FAQ: What work does the Arizona CR-21 license cover?

The CR-21 classification covers the scopes of the commercial C-21 and residential R-21 Hardscaping and Irrigation Systems licenses. It includes covered hardscaping, irrigation systems, low voltage landscape lighting, certain water features, grading, trenching, and related work within the limits of the classification.

FAQ: Does the CR-21 license allow swimming pool work?

No. The listed scope excludes swimming pools and pool deck coatings. Work outside the CR-21 scope should be handled by the appropriately licensed contractor.

FAQ: Why is OSHA 29 CFR Part 1926 included?

OSHA 29 CFR Part 1926 is included because construction safety is part of the exam content. It supports preparation for excavation, trenching, personal protective equipment, tools, ladders, material handling, and general jobsite safety topics.

FAQ: How should I study with this books allowed into exam package?

Study the exam content outline, learn the structure of the OSHA, IBC, and IRC references, add permitted permanent tabs before exam day, and practice timed lookups. The better you know the books, the more useful they become during the open-book test.