Sitonce
Country: US
Show exams for United States Hong Kong
Sign in
Study plans and method

Which book answers which category

Compiled by the Sitonce editorial team from the PSI Candidate Information Bulletin, NASCLA's own published material and the federal standards named belowUpdated 2 min readFacts verified 4 September 2026
The short answer

Map each of the twelve categories to its primary reference before you start studying. General Requirements goes to the OSHA standards, Procurement to the business and law guide, and the trade categories to their own texts.

With two dozen books on the table, choosing the wrong one costs a minute before you have read anything.

The map

CategoryPrimary reference
Procurement and ContractingBusiness, law and project management guide
General RequirementsOSHA 29 CFR 1926
Site ConstructionOSHA Subpart P and site work references
ConcreteConcrete reference, plus OSHA Subpart Q for safety
MetalsSteel reference, plus OSHA Subpart R
Mechanical and PlumbingBuilding code and MEP references
WoodBuilding code span tables and carpentry reference
Thermal and MoistureBuilding code and roofing reference
FinishesBuilding code for rated assemblies
MasonryMasonry reference, plus OSHA for bracing
Doors and GlazingBuilding code egress provisions
ElectricalOSHA Subpart K

Verify against the current bulletin, which names the actual titles and editions. This is the shape rather than the list.

Notice how often OSHA appears

Six of the twelve categories send you to the OSHA standards for at least part of their content. That book is worth knowing better than any other, and it is why safety questions turn up inside trade categories.

The cross-references that catch people

  • Rebar impalement protection is a concrete question answered in OSHA
  • Masonry wall bracing is a masonry question answered in OSHA
  • Steel erection fall protection is a metals question answered in OSHA
  • Formwork removal is a concrete question answered in OSHA

The pattern is consistent: if a trade question is about somebody getting hurt, the answer is in the safety standards.

How to internalize it

Write the map on one page and keep it beside you while practicing. After two weeks you will not need it, and that is the point.

Common questions

Which book answers OSHA questions?

29 CFR 1926, and it covers part of six of the twelve categories.

Which book covers contracts and business?

The business, law and project management guide, which carries the largest category at 31 questions.

Why do safety answers appear in trade categories?

Because if a trade question is about somebody getting hurt, the answer sits in the safety standards rather than the trade text.

How do I learn the map?

Write it on one page and keep it beside you while practicing. After a fortnight you will not need it.

Where is the authoritative list?

The current PSI bulletin, which names titles and editions.