Sources & Site Index

Planning values used for the homepage comparison. Final pricing depends on project scope, steel market conditions, fabrication requirements, coating, freight, traffic control, and installation plan.

• WisDOT Facilities Development Manual, structure cost estimating guidance
• MCS estimating guidance, to be confirmed per project

Published grid deck material notes and industry presentations document decades of service history, including grid decks placed in the 1930s that remain in service. BGFMA materials also position galvanized steel grid systems as part of the 100-year bridge service-life conversation.

• BGFMA presentation, prefabricated grid reinforced concrete bridge deck replacement
• Bridge Grid Flooring Manufacturers Association deck systems overview

The CIP figure uses an 8-inch normal-weight concrete deck assumption. The grid range reflects published open grid, half-filled grid, and Exodermic deck weight ranges.

• PennDOT BD-604M standards, normal-weight concrete reference
• L.B. Foster steel grid bridge decking specification sheets

FHWA work-zone statistics count at least two work-zone deaths on US roads every day, with most victims drivers and passengers: 956 work-zone deaths in 2021, one fatality for every $112 million of roadway construction spending, and rear-end collisions behind nearly one-quarter of fatal work-zone crashes in 2024. Every additional day of field work above live traffic raises the chance a project contributes to that total. Prefabricated bridge elements move more work away from active traffic and reduce the number of field operations performed on the bridge.

• FHWA Work Zone Facts and Statistics
• FHWA 2026 National Work Zone Awareness Week factsheet
• Federal Highway Administration, prefabricated bridge elements and systems guidance

The homepage comparison uses published staged-replacement examples as a planning signal, not a guaranteed closure schedule. Actual closure windows depend on phasing, access, traffic control, and owner requirements.

• BGFMA presentation, staged bridge deck replacement examples

CIP deck work typically requires forming, placement, finishing, and curing in sequence. Bridge Grid panels are fabricated before delivery and set in the field.

• Federal Highway Administration, accelerated bridge construction resources
• BGFMA presentation, prefabricated grid bridge deck replacement

Several steel grid deck systems are designed to act as permanent forms, reducing temporary forming, shoring, and stripping work in the field.

• Bridge Grid Flooring Manufacturers Association deck systems overview

MCS project records for a half-filled grid replacement showed field labor hours at roughly half of the comparable cast-in-place approach. This is a project record, not a universal guarantee.

• MCS Ashland project record