ARMY TM 5-5420-212-10-1 MARINE CORPS TM 08676A-10/1-1 Section III.  RESTRICTED SITES This  section  describes  the  procedures  for  assembly  and  disassembly  of  2E  +  12  bay  double  story  bridges  on restricted sites.  A site is considered restricted when the R distance (construction space) is less than the distance given in Table 3-8, 3-15, 3-24 and 3-32. This R distance can be reduced by as much as 3 bays by using launching noses one or two sections longer than the  standard  launching  nose  and  by  booming  the  bridge  more  frequently.    Table  6-29  gives  the  minimum  R  distance possible when using launching nose longer than standard.  The R distances do not include length of push bar or vehicle. TABLE 6-23. Minimum R Distance when using longer than standard launching noses 2E + No. of Bays NOSE CONSTRUCTION 3N1 4N1 5N1 6N1 7N1 8N1 1 30 ft 9.1 m 2 30 ft 9.1 m 3 30 ft 9.1 m 4 30 ft 22 ft 9.1m 6.7 m 5 30 ft 24 ft 9.1 m 7.3 m 6 36 ft 30 ft 11.0 9.1 m 7 42 ft 36 ft 12.8 m 11.0 m 8 42 ft 36 ft 12.8 m 11.0 m 9 48 ft 42 ft 14.6 m 12.8 m 10 54 ft 42 ft 16.5 m 12.8 m 11 54 ft 42 ft 16.5 m 12.8 m 12 54 ft 48 ft 16.5 m 14.6 m R Distances above do not include length of push bar or launching vehicle. Since the procedures are very similar to bridges on normal sites, only the steps that are different will be detailed. The  operator  should  be  familiar  with  the  General  Drills  (Chapter  4)  and  the  assembly  and  disassembly  of  double  story bridges on normal sites before attempting a restricted site build. 6-55