CSI Division
CSI Division 13 Special Construction: section numbers and submittal deviations
What gets flagged between a Division 13 Special Construction spec section and the submittal package, why it matters, and how each deviation is graded, so you can catch it before you send the package or before you approve it.
Short answer
Special Construction is Division 13 in CSI MasterFormat, so its section numbers start with 13. Common sections include 13 10 00 Special Facility Components, 13 11 00 Swimming Pools, and 13 17 00 Tubs and Pools. Its submittals deviate most often on product substitutions, performance ratings, and missing certifications.
Division 13 covers special construction systems and specialty enclosures in commercial and institutional projects: pre-engineered structures, controlled environment rooms, special purpose rooms, aquatic facilities, and protective systems. Common CSI sections submitted for review:
Division 13 Special Construction CSI section numbers
Division 13 Special Construction spec sections frequently submitted for review:
| Section | Title |
|---|---|
13 10 00 | Special Facility Components |
13 11 00 | Swimming Pools |
13 17 00 | Tubs and Pools |
13 18 00 | Ice Rinks |
13 19 00 | Kennels and Animal Shelters |
13 21 00 | Controlled Environment Rooms |
13 21 13 | Clean Rooms |
13 21 23 | Cold Storage Rooms |
13 21 26 | Sound-Conditioned Rooms |
13 28 00 | Athletic and Recreational Special Construction |
13 34 00 | Fabricated Engineered Structures |
13 34 19 | Metal Building Systems (Pre-Engineered) |
13 42 00 | Building Modules (Modular/Prefabricated) |
13 48 00 | Seismic Protection |
13 48 13 | Seismic Isolation Systems |
13 49 00 | Lightning Protection |
13 49 21 | Radiation Protection |
13 49 23 | Storm Shelters and Safe Rooms |
13 49 33 | Vault Construction |
Sending a Division 13 package? Run the free Division 13 pre-submittal checklist first. It prints or downloads as a PDF, no email required.
The six deviation categories in Division 13 Special Construction
Every issue Deviation Check flags maps to one of six categories. Here is how each appears in Division 13 Special Construction submittals, with the full guide one click away.
Manufacturer or Product Substitution
Blocker The submittal proposes a different manufacturer or product than the spec names, without an approved or-equal or substitution request.
Div 13 specs name specialty manufacturers for unique building systems. Look for:
Manufacturer or Product Substitution in Division 13 Special Construction submittals →
Performance Specification Gap
Blocker A measurable performance property in the submittal (rating, capacity, tolerance, efficiency) does not meet what the spec requires.
Key performance parameters in Div 13 submittals:
Performance Specification Gap in Division 13 Special Construction submittals →
Missing Certification or Compliance Documentation
Fix and Resubmit A required listing, test report, certification, or compliance document is absent from the submittal package.
Required certifications in Div 13 submittals:
Missing Certification or Compliance Documentation in Division 13 Special Construction submittals →
Aesthetic Deviation
Fix and Resubmit A visible attribute (color, finish, texture, profile) differs from the spec or the architect-approved sample.
Aesthetic Deviation in Division 13 Special Construction submittals →
Detail or Installation Mismatch
Fix and Resubmit The submitted detail, dimension, anchorage, or installation method differs from what the spec or drawings require.
Detail or Installation Mismatch in Division 13 Special Construction submittals →
Submittal Package Incompleteness
Fix and Resubmit A required submittal element (cut sheet, schedule, calculation, sample) is missing, leaving the package unreviewable as submitted.
Commonly required items in Div 13 specs:
Submittal Package Incompleteness in Division 13 Special Construction submittals →
How Division 13 deviations are graded
Each finding is graded Blocker, Fix and Resubmit, or Note. Division 13 escalation rules:
- Clean room panel not meeting flame spread per ASTM C1166: BLOCKER (fire/life-safety)
- Lightning protection system not UL 96A or NFPA 780 compliant: BLOCKER (life-safety, insurance)
- Radiation shielding below design thickness: BLOCKER (occupant health, NRC compliance)
- Storm shelter not meeting ICC 500 or FEMA P-361: BLOCKER (life-safety)
- Vault fire rating below specified hours: BLOCKER (asset protection, code)
- Seismic isolation bearing capacity below structural demand: BLOCKER (structural/life-safety)
- Clean room ISO classification not achievable with submitted filter layout: BLOCKER (functional failure)
- Blast resistance below specified psi overpressure: BLOCKER (life-safety)
- Pre-engineered building finish or color mismatch: FIX_AND_RESUBMIT (aesthetic, contract)
- Pool equipment capacity below specified flow/turnover: FIX_AND_RESUBMIT (health code, performance)
- Missing air balance calculations for clean rooms: FIX_AND_RESUBMIT (commissioning dependency)
- Missing lightning protection zone coverage analysis: FIX_AND_RESUBMIT (design verification)
- Cold storage insulation R-value below spec: FIX_AND_RESUBMIT (energy performance)
- Missing installer qualification documentation: FIX_AND_RESUBMIT (warranty requirement)
Run a Division 13 submittal review
Upload a Division 13 spec section and your submittal package before you send it, and get a one-page deviation report in under five minutes, so the package goes through the first time. GC reviewers use it the same way on a package that just arrived. Before that, work through the free Division 13 checklist.
Frequently asked questions
What is the CSI code for special construction?
Special Construction is CSI MasterFormat Division 13, and every section number in it starts with 13. Common sections include 13 10 00 Special Facility Components, 13 11 00 Swimming Pools, 13 17 00 Tubs and Pools, 13 18 00 Ice Rinks, and 13 19 00 Kennels and Animal Shelters. Type any number into the CSI division lookup to decode it.
What is Division 13 Special Construction in construction?
Division 13 covers special construction systems and specialty enclosures in commercial and institutional projects: pre-engineered structures, controlled environment rooms, special purpose rooms, aquatic facilities, and protective systems. In a CSI MasterFormat spec, its sections carry the submittal and product requirements a Division 13 package is reviewed against.
What are the most common deviations in Division 13 Special Construction submittals?
The most common are product or manufacturer substitutions, performance specification gaps, and missing certification or compliance documentation. Deviation Check sorts every finding into one of six categories.
How are Division 13 deviations graded?
Each finding is graded Blocker (resolve before approval), Fix and Resubmit (correct and re-send before fabrication or install), or Note (acceptable with a comment).
View this page as Markdown for LLMs and note-taking.