ARMY TM 5-5420-212-10-1 MARINE CORPS TM 08676A-10/1-1 TABLE 1-5.  Work Parties for MGB Bridge Lengths Work Party 4 and 5 bay (26ft - 7.9m, 32ft - 9.8m) SSB 1 NCO + 8 personnel 6 thru 12 bay (38ft - 11.6m thru 50ft - 15.2m) SSB 1 NCO + 16 personnel All DSB’s 1 NCO + 24 personnel Anchorage Party for DSB’s (if required) 8 personnel Link Reinforcement Party 1 NCO + 8 personnel b. Approximate building times for various bridges are given in Table 16.  Time is calculated from arrival on site to the opening of bridge. TABLE 1-6.  Building Times (good conditions) Single Story Double Story (without reinforcement) Double Story (with reinforcement) 4-5 Bay 6-8 Bay 9-12 Bay 1-4 Bay 5-8 Bay 9-13 Bay 14-18 Bay 19-22 Bay 13 Bay 14-18 Bay 19-22 Bay Time by Day (hrs) ½ ¾ 1 ¾ 1 1½ 1¾ 2 2 2¾ 3 Time by Night (hrs) ¾ 1 1¼ 1¼ 1½ 2 2¾ 3 3 4 4½ NOTE: All timings exclusive of work on approaches. Add 20 percent for unskilled personnel. Add 30 percent for inclement weather. Add 30 percent for adverse site conditions. 1-14