Trench Grates



The result of a productive collaboration with Peter Walker and Partners for use in their award winning Jamison Square, the aptly named Jamison design has been adopted by the design community as the new standard for a high quality, modern, pedestrian friendly trench grate.

Its clean modern rectilinear design of 1/4" openings offset by 3/8" bars seems simple, but belies the deep technical expertise needed to successfully cast this product.

Notable installations include University of Stanford School of Business, Dallas Performing Art Center, York Street in Toronto and many, many others.

International Symbol Of Access Tiny Conforms to ADA Accessibility Guidelines

Available Sizes

|  2" x 18"   pdf   dwg   |   75mm x 19.68" (.5m)  pdf   dwg  |
|  4.84" x 19.68" (.5m)   pdf   dwg  |   6" x 18"   pdf   dwg  |
|  7" x 36"   pdf   dwg  |   12" x 42"   pdf   dwg  |
|  24" x 36"  pdf   dwg  |  36" x 36"  pdf   dwg  |
|  48" x 48"  pdf   dwg  |

Jamison-PA (bars run parallel to trench)
|   4" x 18"  pdf   dwg   |  12" x 42"  pdf   dwg  |
|  18" x 18"  pdf   dwg  |  24" x 48"  pdf   dwg  |
|  36" x 36"  pdf   dwg  |  48" x 48"  pdf   dwg  |

General Specification Links

Installation Frame Information
Material and Finish Options

Powder Coat Color Chart

Generic CSI Specification

Available Materials

100% Recycled Grey Iron ǂ, per ASTM A48 class 35b   Recyclable3a [Converted]
Ductile Iron, per ASTM A536, class 65-45-12
100% Recycled Aluminum, per ASTM B26   Recyclable3a [Converted]
Silicon Bronze, per ASTM B26
Nickel Bronze, per ASTM B30

Recyclable3a [Converted] Reycled Content and Origin of Materials Affadavit

Available Finishes

Raw Natural Finish ǂ
Rust Conditioner - Grey and Ductile Iron Only - Additional Information
Polyester Powder Coat - Standard color options
Liquid Coat - Available upon request - Please provide paint color number, system number and manufacturer.
Brush - Aluminum, Bronze and Nickel Bronze Only
Polish -  Aluminum, Bronze and Nickel Bronze Only

ǂ Standard