Construction-stage calculations and analysis
Stage-by-stage analysis of the structure as it is built, confirming stability and accuracy through every construction phase rather than only in the completed condition.
Services
Construction Engineering and Temporary Works
BECT works with contractors on how a bridge is actually built: the construction-stage analysis, the temporary works, the erection method and the equipment needed to carry it out.
Capabilities at a glance
- Construction-stage engineering
- Analysis and controlStage calculations, geometry and precamber, constructability, works over live infrastructure
- Temporary works
- Design and checkingFalsework and formwork, stability systems, temporary prestressing, cofferdams and shoring
- Erection and lifting
- Method and sequenceErection method planning, staging, incremental launching, heavy lifting
- Production facilities
- Casting and mouldsCasting yard layout and precast segment and beam mould design
Overview
What construction engineering covers
A bridge design says what the finished structure must be. Construction engineering answers a different question: how it can be built safely, in what order, and with what temporary structure holding it up while it is incomplete. Those are not the same problem, and the second is where most construction risk sits.
BECT works with contractors on that problem. The work covers construction-stage analysis, the design of temporary works, the planning of erection methods, and the equipment interfaces those methods depend on. Temporary works and the permanent structure are handled together rather than in isolation, because each constrains the other.
Construction-stage engineering
Analysis and control during construction
A structure passes through every intermediate state before it reaches its final one, and it is often at its most vulnerable in those states. This work checks each of them.
Geometry and precamber control
Managing construction deflections, tolerances and camber adjustments so that the bridge reaches the required alignment, levels, profile and final design shape.
Constructability and value engineering
Construction technology, construction value engineering and constructability review, applied to the buildability of the method rather than to the permanent design alone.
Construction over live infrastructure
Design and certification for works above or adjacent to rail, road and utility infrastructure that remains in service throughout construction.
Temporary works
Temporary works engineering
Conceptual and detailed design of the structures that exist only while the permanent one is being built, and that carry it until it can carry itself.
Temporary works design
Conceptual and detailed design for high-complexity temporary works, developed against the constraints of the specific project.
Falsework and formwork design
Design of the temporary support structures that carry wet concrete and construction loading until the permanent structure is self-supporting.
Stability system design
Design of the temporary stability system for balanced-cantilever construction, holding stability, control and safety through the cantilever stages.
Temporary prestressing
Design of temporary prestressing for erecting precast segmental components: high-strength tension bars, anchorage details, stage checks, and stressing and destressing sequences that maintain stability, alignment and joint compression during erection.
Cofferdam and shoring
Temporary works engineering for safe excavation, water control and ground support, including cofferdam design, shoring systems, stability checks and construction-stage support.
Methods and systems
Erection methods, launching and lifting
How the structure is assembled, in what sequence, and by what mechanism each element is moved into position.
Erection method planning
Selection and development of the assembly technique for the bridge or structure, worked against site access, programme and the permanent design.
Staging and sequencing
Sequencing strategies for complex structures, including the complex staging arrangements that multi-stage erection requires.
Incremental launching design
Design of the launching system, including the launching nose, pulling system and sliding bearings, for safe and controlled deck launching with proper stability and alignment.
Heavy lifting engineering
Safe installation and movement of major structural elements: lift planning, rigging design, strand jack systems and temporary stability checks.
Production
Casting yards and precast production
Where precast construction is used, the yard and the moulds are part of the engineering, not a separate procurement exercise.
Casting yard design
Planning and setting up the facilities for precast segment production, including layout and the flow of segments through casting, storage and despatch.
Precast mould design
Design of high-precision moulds for precast segments and beams, where the mould geometry governs the geometry of the finished structure.
Interfaces
Equipment interfaces
Most erection methods depend on a specific piece of equipment, and the temporary works have to suit it. BECT designs and supplies that equipment as well, so the method and the machine are engineered against one another rather than separately.
Output
Typical deliverables
What a construction engineering commission produces, depending on the method and the stage at which BECT is engaged.
Swipe or scroll horizontally to view the full table.
| Area | Deliverable |
|---|---|
| Construction-stage analysis | Stage-by-stage calculations and stability checks |
| Geometry control | Deflection, tolerance and precamber control for alignment, levels and profile |
| Temporary works | Conceptual and detailed design of high-complexity temporary works |
| Falsework and formwork | Temporary support structure design |
| Stability systems | Temporary stability system design for balanced-cantilever construction |
| Temporary prestressing | Tension bars, anchorage details, stage checks, stressing and destressing sequences |
| Incremental launching | Launching nose, pulling system and sliding bearing design |
| Heavy lifting | Lift planning, rigging design and strand jack systems |
| Ground and water | Cofferdam design, shoring systems and stability checks |
| Erection method | Erection method planning and staging sequences |
| Live infrastructure | Design and certification for works over or adjacent to operating rail, road and utilities |
| Precast production | Casting yard layout, and precast segment and beam mould design |
Approach
How the work is organised
The order matters. Each step constrains the next, and a method chosen before the constraints are understood usually has to be redone.
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Constraints
Establish what the site, the programme and the permanent design actually allow, before any method is fixed.
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Method and sequence
Develop a buildable erection method and staging sequence against those constraints.
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Temporary works
Design the temporary structure and equipment interfaces the method requires, coordinated with the permanent structure.
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Stage verification
Check the structure in each intermediate condition, and control geometry and precamber through to the final design shape.
Gallery
Construction engineering in practice
Temporary works, formwork, erection equipment and precast production facilities in service.
Related
Related services
Bridge Design & Consultancy
Conceptual, preliminary, tender and detailed design for prestressed concrete, composite and steel bridges, with alternative design and independent design verification.
Special Construction Equipment
Design, fabrication and supply of self-launching bridge construction equipment in overhead and underslung configurations.
Structural Steel Fabrication
Engineered heavy steelwork delivered through an established fabrication partner, with trial assembly and quality-controlled production support.
Get in touch
Discuss your construction engineering requirement
Tell us the structure, the site constraints and the programme, and our team will respond to your enquiry.