Division 32 Exterior Improvements
Manufacturer or Product Substitution in Division 32 Exterior Improvements 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 32 Exterior Improvements: 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 32 Exterior Improvements submittals.
What to look for in Division 32 Exterior Improvements
Site improvement specs frequently name brand products or approved manufacturers. Look for:
- Asphalt mix design source plant substitution (mix design is plant-specific; different plant requires new mix design approval)
- Concrete mix design batch plant substitution (requires re-submitted batch plant certification)
- Irrigation controller manufacturer swaps (Rain Bird, Hunter, Toro, Weathermatic) where integration with existing controls is specified
- Irrigation head brand changes (Rain Bird vs Hunter vs Toro) affecting precipitation rate matching and part-circle patterns
- Site furnishing manufacturer substitutions (benches, bike racks, trash receptacles, bollards) where specified product sets aesthetic and dimensional standard
- Fencing system manufacturer swaps (Ameristar, Merchants Metals, Master Halco) especially for ornamental iron or security fencing
- Plant nursery source substitution where local provenance or specific grower is specified
- Synthetic turf manufacturer swaps (FieldTurf, Shaw, Hellas, AstroTurf) where specified product has proprietary shock pad system
- Rubberized track surface manufacturer substitution (Beynon, Mondo, Rekortan)
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 32 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 32
Frequently asked questions
What manufacturer substitutions are most commonly flagged in Division 32 Exterior Improvements submittals?
Asphalt mix design plant swaps are flagged most often because a mix design is plant-specific - switching batch plants requires a new mix design approval, not just a name change on the cover sheet. Irrigation controller brands (Rain Bird, Hunter, Toro, Weathermatic) are also flagged when integration with existing controls is specified, since protocols and wiring differ between manufacturers.
How should a subcontractor clear a synthetic turf manufacturer substitution in a Division 32 Exterior Improvements submittal?
The sub must submit an or-equal approval letter from the architect of record - without it, the substitution is a Blocker. This matters especially when the specified product (FieldTurf, Shaw, Hellas, AstroTurf) has a proprietary shock pad system, because a different manufacturer's pad will have different impact attenuation values that must be independently verified to meet the Gmax limit.
View this page as Markdown for LLMs and note-taking.