HD100 Bailey Bridge

The HD100 is the lightest bridge in our HD (Heavy-Duty) panel family - the "100" just tells you where it sits on the load scale. We built it for people who need a dependable single-lane crossing for light to medium traffic, fast, without paying the logistics bill of a heavier system. Contractors, emergency-response teams and camp operators are the usual buyers. The hd100 bailey bridge is built for this.

What you get is a high strength-to-weight ratio and the simple assembly small-panel systems are known for. Crews already trained on conventional bailey systems pick it up immediately - same geometry, same tools, same procedures - while the improved steels and node details give you more performance per kilogram. It's the right call when heavy plant traffic isn't in the picture.

Lightest panel in the HD family; two-person handling feasible without mechanical lifting. The hd100 bailey bridge makes this practical.

Proven bailey panel geometry with standard pin-and-bolt connections.

Galvanized finish supports multi-season outdoor service.

Spans typical small streams, ditches, and railway sidings with no deep foundations.

Reusable and reconfigurable across multiple projects.

Compatible with standard bailey accessories: transoms, sway frames, handrails, and ramp units.

Under load this behaves like a simple through-truss girder. The deck weight comes in through the transoms and goes straight into the paired longitudinal trusses. From there the Pratt/Howe web arrangement does what a truss does best: it splits the load into axial forces in the chords and diagonals, so each member carries a clean, predictable tension or compression. Cross frames between the two truss lines keep things laterally stiff so the span doesn't sway under an off-center wheel. The hd100 bailey bridge is built for this.

Erection follows the classic method. You stage the panels on one abutment, build out over the gap with a launching nose, and seat the assembly on bearing pads - reversing the steps takes it down. And because the HD100 is the lightest in the series, you don't need much iron behind it: a modest crawler or wheeled crane handles it, and on the shorter spans a couple of people with a hand winch can do the launch.

It's a fit for light construction and maintenance access roads, and for emergency foot-and-vehicle crossing after floods, washouts or minor road collapses. Camps, quarries and farms use it over ditches and small streams, and it gives temporary pedestrian and maintenance access to railway or highway structures. Event sites use it for road crossings, and really any job that wants a quick, low-cost single-lane bridge where heavy plant isn't expected. The hd100 bailey bridge is built for this.

The HD100 is our lightest panel, so customization is mostly about trimming the footprint and the logistics to your crossing. We set span and deck width to your site - 3.3 m standard, 4.2 m if you want more room, and a single- or double-truss layout for the span you need. Finish is hot-dip galvanized as standard, and we can add the epoxy polyurethane topcoat when the site is coastal or exposed. Panels ship in standard containers and we can supply only the bays you need, so you don't pay for steel you won't use. If you send us a sketch or a site photo we'll size the truss and the bearings and quote you a kit that your own crew can assemble. The hd100 bailey bridge is built for this.

The HD100 is built from standard 3.048 m × 1.45 m bailey panels pinned end to end into two longitudinal trusses, with reinforced chords carrying the bending moment along the span. Transoms carry the deck load across to the trusses, and the diagonal web members turn that load into clean axial tension and compression. Cross frames between the two truss lines keep the span from swaying or racking under an off-center wheel. The deck is anti-slip checker plate or perforated grating sitting on the transoms, and the whole assembly rests on elastomeric or rocker bearings seated on compacted fill or timber sills. Pins and bolts are zinc-flake coated so the connections hold up through repeated assembly and take-down. The hd100 bailey bridge is built for this.