Bridges

Pipe bridge, gantries and foundations.
Contact for bridges

FLI scope of work:

Design, Supply & installation, including Support Columns, Bridges & Foundations.

All capabilities in-house:

Efficient project delivery with design, supply & installation by a single team.

Leaner solutions:

Foundation & superstructure are designed & installed together.

Over 70 years experience installing steel structures at challenging locations.

Pipe bridge by FLI Structures winding around trees across a valley

CAD view of pipe bridge design by FLI Structures

Design & Detailing, In-House.

Team of 20 in-house design engineers, with detailing to BIM level 1.

Bridge sections – lattice & beam sections.

Supports – lattice, UB and CHS options.

Foundations – designed according to local GI and loads.

Anti-climb options.

Recent Projects

Durham – ESH – Northeast Water:
114m long, multi-span, multi-directional, pipe bridge, installed in a rural location on sloping sites, designed with 100 years design life.

Pirbright Institute - Kier:
68m long, multi-span pipe bridge in industrial park, supporting steam, waste, fresh water and electrical services. (photo)

Cinderford - Severn Trent:
44m long pipe bridge, to replace decaying existing structure. 3 support columns and piled foundations.

Pipe bridge by FLI Structures at industrial site

FLI Structures installing a pipe bridge across a gully at Durham

Durham Pipe Bridge

Client Name: North East Water Contractor: ESH / Stantec JV
Project Value: £835,000

Scope of Work:
Design, supply and install of 114m long pipe bridge.
3No 20m spatial lattice gantries and column superstructure on 10No substructure frames and 42No screw piles. 100 year design life.
Challenges:
Uneven, Sloped Terrain: The site was unsuitable for traditional concrete foundations due to its challenging topography.
Environmental Constraints:
Working over a watercourse required minimising earthworks to comply with environmental regulations.
Complex Pipe Layout:
The multi-directional pipe run added design and installation complexity within tight timescales.
Rural Location Logistics:
Developing and executing lift plans in a remote area posed significant logistical challenges.

Replacing pipe bridge support on steep slope

Cinderford – Severn Trent:
Replacing decaying structure.

Photo:
Old pipe support with scaffold strengthening, next to FLI’s replacement column and foundation.
Early contractor involvement helped with the design of a solution that made installation on a potentially challenging site, quicker, easier and safer.

Screw pile foundations for pipe bridges.

Photo:
Screw piling for a pipe bridge across a valley in Durham.

Screw piles are very quick and simple to install and negate the need for concrete/wet trades. There are no excavations, cart away, rebar fixings, concrete pouring or waiting for cube test results.

Information on Screw Pile Foundations

screw piling by FLI Structures for a pipe bridge

SCrew pile and grillage foundations for pipe bridge

Photo:
Grillages and pipe supports landed onto the screw piles.

Superstructures can be landed onto their foundation immediately after install, saving time and money on site works.

Screw piles are more sustainable than mass concrete, with the carbon footprint of an average FLI foundation being 64% lower. The screw piles can also be unscrewed and fully recycled at end of life.