PD 6634-4:1999

Committees responsible
      Foreword
      Introduction
1 Scope
2 DTp Technical Memorandum BE5
3 Developments of bridge parapets under BS6779
      3.1 General
      3.2 Derivation of theoretical design forces
      3.3 Design load safety factors
4 Development of metal bridge parapets
      4.1 General
      4.2 Development of aluminium alloy parapets
      4.3 Development of steel parapets
5 Development of concrete based bridge parapets
      5.1 General
      5.2 Development of combined metal and concrete parapets
      5.3 Development of concrete parapets
6 Masonry parapets - Brick sandwich concrete reinforced parapets
7 Timber parapets
Bibliography
Figure 1 - Variation of impact force F with vehicle speed v
Figure 2 - Variation of lateral impact force F with vehicle and
           parapet crush distance z
Figure 3 - High containment (P6) steel parapet arrangement for full
           scale impact tests - Parapet design concept
Figure 4 - Combined concrete parapet cross-section M40, London (based
           on BE5 in situ group P1)
Figure 5 - Combined concrete parapet cross-section M5-M6, Midlands Link
           (precast construction)
Figure 6 - Combined concrete parapet cross-section: high containment
           (P6) precast construction
Figure 7 - Shaped concrete parapet cross-section: high containment (P6)
           in situ construction
Figure 8 - Near vertical concrete parapet cross section: high
           containment (P6) precast construction
Figure 9 - Brick sandwich reinforced concrete parapet
Figure 10 - Timber parapet prepared for Devon County Council
Table 1 - BE5: vehicle containment requirements for bridge parapets
Table 2 - Vehicle containment requirements for bridge parapets (from
          BS6779)
Table 3 - Vehicle impact tests on aluminium alloy parapets
Table 4 - Vehicle impact tests on steel parapets
Table 5 - Design parameters for P6 parapet
Table 6 - Early design requirements for concrete parapets in BE5 (later
          modified after full scale testing - see BS6779)
Table 7 - Vehicle impact tests on concrete parapets

Deals with the development of bridge parapets in the United Kingdom as a result of theoretical models and impact testing. Designs are concerned with the containment of vehicles of mass from about 825kg to 30000kg. Impact tests are detailed for the lighter vehicles at speeds up to 110km/h (70 mile/h) and for heavy commercial vehicles (HCVs) at up to 80km/h (50 mile/h).

This part of PD 6634 describes the development of bridge parapets in the United Kingdom as a result of theoretical models and impact testing. Bridge parapet designs are described for the containment of vehicles of mass from about 825 kg to 30 000 kg. Impact tests are described for the lighter vehicles at speeds up to 110 km/h (70 mile/h) and for heavy commercial vehicles (HCVs) at up to 80 km/h (50 mile/h).