1. CODE design group is ready to undertake bridge design tasks for small, medium and large span bridge crossings in urban and rural settings. Design is in general developed to one of the following international codes in conjunction with the application of the regulations of local authorities vis-à-vis axle loads and seismic regulations:
1. American code AASHTO
2. British standard BS5400
3. French codes BAEL, BPEL and Fascicule 61
Deck material: Reinforced concrete, prestressed concrete or steel
Traffic type: Pedestrian, vehicular or railway
Structural system: Simply supported or continuous
Deck system: Slabs (solid or voided), slab-on-girders or box girders
(single or multi-cells)
Construction mode: Cast-in-situ, precast, balanced cantilever, by launching or
3. The design of a bridge structure is normally carried out in three typical phases, namely:
3.1 Concept Design
It includes the following tasks:
1. Data collection on local regulations, axle loads, environmental data, materials
availability, local construction techniques and the like.
2. Selection of design standards and codes.
3. Development of various bridge alternatives in form of drawings and perspectives.
4. Comparison of different alternatives technically, aesthetically and economically and
recommendation of most competitive concepts.
3.2 Preliminary Design
After Client’s approval of bridge concept, the preliminary design phase is prepared to produce the following documents:
1. General arrangement drawings of abutments, piers and deck.
2. Foundations general arrangement drawings based on results of subsoil investigation
3. Construction method and sequence.
4. Pre-stressing scheme.
5. Deck accessories details namely, bridge bearings, movement joints, parapets,
drainage gullies, waterproofing membranes and wearing courses.
6. Preliminary Quantities.
7. Technical Specifications.
8. Preliminary calculation notes.
3.3 Final Design
Upon approval of the preliminary design, the final design is developed taking into account any eventual comments.
The issued documents include:
1. Final general arrangement drawings including detailed setting out and dimensions.
2. Final foundations details including piling, if any.
3. Prestressing final details including cable profiles, anchorage layout and forces.
4. Detailed reinforcement drawings for substructure and superstructure elements.
5. Bar bending schedules of passive reinforcement.
6. Bearing and movement joint details.
7. Deck drainage details.
8. Waterproofing and bituminous pavement details.
9. Parapets and metallic rails.
10. Final bills of quantities.
11. Final technical specifications.
12. Final calculation notes.