FMH-20™ Firetruck‑Rated Residential Bridge
Steel girder, timber/composite deck bridge engineered for 20‑ton apparatus loading and spans up to 60 ft.
Technical Specifications
| System Name | FMH‑20™ Firetruck‑Rated Residential Bridge |
| Design Loading | 20‑ton deck capacity (fire‑apparatus rating); project‑specific analysis per applicable codes |
| Standard Span Range | 20 – 60 ft (longer by engineered option) |
| Superstructure | Structural steel girders; galvanized or shop‑primed; field top‑coat optional |
| Deck Options | Pressure‑treated timber; FRP/composite panels; steel bar grating (project‑specific) |
| Deck Wearing Surface | Timber planks, composite overlay, or anti‑skid surface per owner preference |
| Abutments | Engineered to ~80‑ton capacity (2:1 safety factor typical) with vinyl sheet piling scour protection embedded 60 in below mud line |
| Foundations | FM‑PP30 Pipe Piles: 3½″ Sch. 40 steel; typical groups of four per abutment; 30‑ton working load each; driven to suitable bearing (e.g., limestone) |
| Pile Connections | Full‑penetration welded • Threaded coupler • Coupler joint; batter piles available (10°–30°) |
| Corrosion Protection | Bare steel • Epoxy coated • Hot‑dip galvanized (recommended in coastal/marine) |
| Handrail/Guard | Steel or timber rail systems per local code height/loads; decorative options available |
| Hydraulics/Scour | Hydrologic modeling available; rip‑rap or sheet pile cutoff walls as required by site |
| Warranty | Lifetime, transferable (when installed by Foundation Masters or authorized contractor) |
Regional Engineering Considerations
Designs account for variable soils (sands to red clays), groundwater often within 3–6 ft of grade, and flood‑driven hydrostatic loads on abutments. Site‑specific geotechnical data and hydrologic modeling are incorporated to ensure long‑term stability and serviceability.
Installation Overview
- Piles driven using pneumatic or vibratory hammer to verified bearing resistance.
- Optional vibration monitoring and load testing available by contract add‑on.
- Abutment cap beams set; girders erected with bearing pads and anchor details.
- Decking installed; wearing surface applied; rails/guards set to code.
Quality & Compliance
- Welding conforms to AWS D1.1 Structural Welding Code – Steel.
- Material certifications and mill test reports available upon request.
- Inspection checklists for piles, bearings, connections, and deck fastening.
- As‑built package includes pile logs, elevations, and photographic documentation.
Popular Options
- Composite (FRP) deck for low‑maintenance performance
- Galvanized superstructure for enhanced corrosion resistance
- Architectural railings, lighting, and decorative fascia
- Extended spans, skewed abutments, or integral wingwalls
- Enhanced scour protection and geotextile underlayment
Downloads & References
- FMH‑20 Technical Data Sheet (PDF) — full specs, details, and typical sections.
- FM‑PP30 Pipe Pile System — foundation used beneath FMH‑20 abutments.
- Residential Bridge Construction — process overview and galleries.
FAQ
What permits and approvals are required?
Permitting varies by jurisdiction and environmental constraints. We provide sealed drawings, calculations, and assistance through local permitting where applicable.
How do you protect against scour and erosion?
Vinyl sheet piling, rip‑rap, and grading are combined with hydrologic modeling to reduce scour risk. We design to maintain bearing and deck approach stability through flood events.
Can you customize aesthetics?
Yes. Architectural rails, fascia, lighting, and finish choices are common upgrades. Replica styles can be developed upon request.