Division 03 Concrete
Manufacturer or Product Substitution in Division 03 Concrete submittals
Short answer
The submittal proposes a different manufacturer or product than the spec names, without an approved or-equal or substitution request. Default grade in Division 03 Concrete: Blocker.
The submittal proposes a different manufacturer or product than the spec names, without an approved or-equal or substitution request. This guide covers how it shows up specifically in Division 03 Concrete submittals.
What to look for in Division 03 Concrete
Concrete specs frequently name specific ready-mix producers, precast fabricators, and specialty product manufacturers. Look for:
- Ready-mix producer substitutions (CalPortland, CEMEX, Lehigh Hanson, Martin Marietta, Vulcan Materials)
- Precast manufacturer substitutions (Clark Pacific, Coreslab Structures, Gate Precast, Metromont, Oldcastle)
- Reinforcing steel fabricator changes
- Admixture manufacturer substitutions (BASF/Master Builders, GCP Applied Technologies, Sika, Euclid Chemical)
- Fiber reinforcement brand changes (Fibermesh, Forta, Nycon)
- Formwork system substitutions (Doka, PERI, EFCO, Symons)
- Curing compound and sealer manufacturer changes
How severe is it?
Default grade: Blocker. Drops to a Note if the submittal attaches an or-equal approval letter from the architect of record.
Deviation Check assigns a default per category and escalates or de-escalates based on the spec, always showing its reasoning. See the Division 03 severity rules.
What the PM should do
Treat this as a hold. Do not approve the submittal until the sub resolves it, either by providing the specified product and documentation or by routing an approved substitution or or-equal request. Return the relevant spec passage to the sub as a redline.
Other deviation categories in Division 03
Frequently asked questions
How do I spot a ready-mix or precast manufacturer substitution in a Division 03 Concrete submittal?
Check the producer name on the mix design against the spec. Common named producers include CalPortland, CEMEX, Lehigh Hanson, Martin Marietta, and Vulcan Materials for ready-mix; Clark Pacific, Gate Precast, Coreslab Structures, Metromont, and Oldcastle for precast. Any name not on the spec's approved list is a substitution. Flag it as a Blocker unless the sub has attached a written or-equal approval from the architect of record.
What documentation clears a concrete admixture manufacturer substitution before the submittal can be approved?
The sub needs a written or-equal approval letter signed by the architect of record. Named admixture brands - BASF/Master Builders, GCP Applied Technologies, Sika, Euclid Chemical - are spec-specific because compatibility with the mix design and other admixtures has to be verified. Without that approval letter the deviation stays a Blocker regardless of the substitute product's published data sheet.
View this page as Markdown for LLMs and note-taking.