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4*15*77*4*15.7(November, 1983)Parapets in Group P,1 may consist ofreinforced concrete walls or at least two effectivelongitudinal members* The limiting dimensions forGroup P« 1 parapets are given in Table 4*15*5 &ndFigure 4*15*1*A parapet corresponding in shape to a profiledconcrete barrier fence is often desirable* Such aparapet is illustrated in ilgure 4*15*3* No kerb shouldbe provided between parapet and carriageway s but a hardstrip is desirable*4*15*8Parapets in Group P* 2 may consist ofreinforced concrete walls 9 at least two effectivelongitudinal members or two effective longitudinalmembers connected by vertical members* Thelimiting dimensions for Group P« 2 parapets aregiven in Table 4*15*6 aisd ELgure 4*15*2*A parapet corresponding in shape to aprofiled concrete barrier fence may also be usedparticularly for limited access roads* Such aparapet is illustrated in figure 4*15«3* No kerbshould be provided between parapet and carriageway,but a hard strip is desirable.4*15*9 P* 3 parapets4*15*1°4*15*11Pedestrian parapets in Group P* 3 should bedesigned to resist the loading given in Table 4*15*1*High containment parapets in Group P» 4should consist of reinforced concrete walls designedto the strength requirements of Table 4*15*4 and to thedimensions given in, Jlgure 4*15*4* The top of the parapetshould be shaped to prevent anybody walking on the topof high containment parapets located on general purposeroads. On limited access roads, different shapes ormetal top rails may be used«In an attempt to limit the maintenance problemsarising from the proliferation of parapet designs,Chapter 9 requires that only th© standard designs listedtherein should be used, unless the approval of C*E*H*/gtr*Hcan be obtained for laori-standard designs. The standarddesigns approved for use are repeated in Appendix 4*15*1*The outer f notfc-traffic, profile of concrete parapets maybe altered to suit the bridge architecture*