# Manufacturer or Product Substitution in Division 31 Earthwork submittals

> Source: https://deviationcheck.com/divisions/31-earthwork/manufacturer-substitution/

The submittal proposes a different manufacturer or product than the spec names, without an approved or-equal or substitution request.

## What to look for in Division 31 Earthwork

Geosynthetic and shoring specs frequently name manufacturers or specify proprietary systems. Look for:
- Geotextile brand substitutions (Mirafi, Propex, Tensar, Huesker) without equivalency documentation
- Geogrid manufacturer swaps (Tensar TriAx, Fortrac, Secugrid) where specific products are tied to engineered designs
- Drainage composite substitutions (Enkadrain, Miradrains, Serindrain) that may have different flow rates
- Erosion control blanket brand changes (North American Green, Profile Products, Western Excelsior) affecting C-factor ratings
- Shoring system component manufacturer swaps where proprietary system was specified (e.g., Schnabel, Hayward Baker, Golder)
- Dewatering pump manufacturer substitutions where flow capacity is performance-critical

## Severity

Default grade: Blocker. Drops to a Note if the submittal attaches an or-equal approval letter from the architect of record.