Series H-50
Series H-50 Modular Pontoons
Designed for assemblies requiring up to 100-ton operational load capacities, the H-50 Series offers exceptional portability, ideal for projects that frequently change locations.
The H-50 Series (Depth: 3.8 ft, Width: 7.5 ft, Length: 15-30 ft) supports over 220,000 lbs and can be combined in modular configurations with multiple units to meet diverse project needs. It is commonly used in marine construction for tasks such as supporting cranes with up to 40-ton capacity, flotation and bridging in pipeline construction, core drilling, dive platforms, and lighter-duty material transport. Its compact size ensures easy highway transport of multiple units at any time, day or night, without restrictions. Additionally, the H-50 can support our larger S-50 and S-70 Series as primary work platforms.
WHICH SERIES IS RIGHT FOR YOUR APPLICATION?
Our Flexifloat® Application Engineers are experts in designing equipment to fit your unique marine construction needs. Contact us for a professional consultation to discover how the H-50 and our flexible solutions can get the job done.
Series H-50 Case Studies
EXPLORE OTHER SERIES

Series S-50
Designed for use in assemblies requiring up to 300-ton operational load capacities.

Series S-70
Designed to support cranes of up to 400 ton capacity,
providing maximum buoyancy and strength.
Series H-50 Modules
| Specifications | Quadrafloat™ | Duofloat™ | End Rake | Loading Ramp |
|---|---|---|---|---|
| Effective Length (ft.) | 30.0 | 15.0 | 7.5 | 15.0 |
| Effective Width (ft.) | 7.5 | 7.5 | 7.5 | 7.5 |
| Effective Depth (ft.) | 3.8 | 3.8 | 3.8 | 3.8 |
| Unit Weight (Lbs.) | 14,500 | 7,900 | 3,500 | 5,600 |
| Buoyant Capacity @ 65% Draft (Tons) | 10.0 | 4.5 | 0.3 | 0.4 |
| Deck Bearing Capacity (PSF) | 3,500 | 3,500 | 2,000 | 5,000 |
| Bottom Bearing Capacity (PSF) | 2,500 | 2,500 | 2,500 | 2,500 |
| Horizontal Lock Spacing (In.) | 45 | 45 | 45 | 45 |
| Vertical Lock Spacing (In.) | 40 | 40 | 40 | 40 |
| Lock Capacity @ 65% Yield (Tons) | 45 | 45 | 45 | 45 |
| Shipping Dimensions | Quadrafloat™ | Duofloat™ | End Rake | Loading Ramp |
|---|---|---|---|---|
| Overall Length (In.) | 365 | 185 | 94 | 186 |
| Overall Width (In.) | 95 | 95 | 89 | 89 |
| Overall Depth (In.) | 47 | 47 | 47 | 47 |
| Cubage (Cu.Ft.) | 943 | 478 | 228 | 450 |
| Specifications | Quadrafloat™ | Duofloat™ | End Rake | Loading Ramp |
|---|---|---|---|---|
| Effective Length (m.) | 9.144 | 4.572 | 2.286 | 4.572 |
| Effective Width (m.) | 2.286 | 2.286 | 2.286 | 2.286 |
| Effective Depth (m.) | 1.158 | 1.158 | 1.158 | 1.158 |
| Unit Weight (kg.) | 6,577 | 3,583 | 1,588 | 2,540 |
| Buoyant Capacity @ 65% Draft (mt.) | 9.07 | 4.08 | 0.27 | 0.36 |
| Deck Bearing Capacity (kPa.) | 167.58 | 167.58 | 95.76 | 239.40 |
| Bottom Bearing Capacity (kPa.) | 119.70 | 119.70 | 119.70 | 119.70 |
| Horizontal Lock Spacing (m.) | 1.143 | 1.143 | 1.143 | 1.143 |
| Vertical Lock Spacing (m.) | 1.016 | 1.016 | 1.016 | 1.016 |
| Lock Capacity @ 65% Yield (mt.) | 40.82 | 40.82 | 40.82 | 40.82 |
| Shipping Dimensions | Quadrafloat™ | Duofloat™ | End Rake | Loading Ramp |
|---|---|---|---|---|
| Overall Length (m.) | 9.271 | 4.699 | 2.388 | 4.724 |
| Overall Width (m.) | 2.413 | 2.413 | 2.261 | 2.261 |
| Overall Depth (m.) | 1.194 | 1.194 | 1.194 | 1.194 |
| Cubage (cu.m.) | 27 | 14 | 6.4 | 13 |