- Highway Contractors
- Utility Companies and Contractors
- Parks and Golf Courses
- Windmill Farms
The Port-a-Bridge® by Griswold Machine & Engineering (GME) is a modular bridge system designed for rapid delivery and installation at the job-site. The Port-a-Bridge is available in 10-foot increments, from 20' to 50' long. Each section is 6-foot wide. Two units join together to form a 12'-wide single-lane structure that allows vehicles, equipment, or foot traffic to proceed over or around the construction site or impassable area.
Typically, a bridge can be installed on-site in minutes, making it ideal for short- to medium-term usage. Units can be loaded onto a truck with a heavy-duty fork truck or small crane. Contractors on-site can install the units using excavators or small rough-terrain cranes.
The system is designed to permit the formation of multiple spans in multiple lanes, utilizing our standard length units. The full-welded structural steel unites feature steel decking for maximum durability. They are designed to meet specific U.S. loading criteria, in accordance with AASHTO-US bridge design code by licensed professional engineers. Each unit can safely handle HS25 loading and typical heavy-duty dump trucks. Units also feature a vehicular crash barrier, also designed and detailed to accommodate pedestrian traffic.
Temporary Bridge Project Gallery
To the left, you will see actual images from an install of a Port-A-Bridge. Please feel free to click on them for a summary and description of what that picture illustrates. Please check back regularly for new and additional projects and photos.
Here are some PDFs specification sheets for our 20, 30, 40, and 50 foot versions of the Port-A-Bridge. Please feel free to download them.