Lessons
Engineering systems, construction, controls, software, codes, licensing, and professional practice.
Lessons & documents
Learn from the archive.
The original Cook Engineers site contains years of lessons, drawings, PDFs, presentations, and technical examples. We’re bringing that material into a searchable, readable library with the original files preserved for reference.
Drawings & examples
PDF examples, diagrams, project references, presentations, and visual explanations from the original archive.
New learning paths
We’ll reorganize the material into short, responsive lessons that work well on phones and computers.
Code learning
Commissioning: CALGreen & Title 24
Study 2025 commissioning requirements, applicability, testing, and project documentation.
Learning materials
Los Angeles plan check references
Use these archived documents to study plan review topics and correction checklists. They are historical learning references; verify current codes and forms before preparing a permit submission.
Mechanical / HVAC plan check correction sheet
City of Los Angeles. 2014 LAMC; revised January 1, 2014.
Plumbing plan check comments
City of Los Angeles LARUCP Plumbing/Mechanical Plan Check List, revised November 2002. This archived scan contains 10 PDF pages; the original form indicates 12 pages, so completeness is not confirmed.
Electrical plan check correction list
City of Los Angeles. Effective 2014; revised July 1, 2014.
Migration promise
The archive stays safe while the lessons get clearer.
Nothing from the original educational archive will be discarded during the redesign. The private backup remains the source of truth while each lesson and document is reviewed and presented in the new site.