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All excavations over 48" deep are treated as Type C soil <br />Use trench box, shoring or 1V-.1.5H sloping <br />See Safety prior to entry for jobs requiring Type A or Type B verification <br />Underground utilities must be located. Photograph locates marks if necessary. <br />All spoils, materials and equipment must be kept more than 2 feet from the excavation edges <br />Shielding/ShoringShielding/Shoring tabulated data must be kept on site <br />Standing or weeping water in the trench must be removed <br />A ladder must be available out of the trench within 25 feet of workers <br />Atmospheric testing must be performed continuously if there is: <br />1. Machinery running that could contaminate the trench with carbon monoxide (CO) <br />2. Underground storage tanks or pipelines that may have leaked into the surrounding soil <br />3. Known landfill or dump site that could migrate flammable or noxious vapors into the trench <br />Traffic Control Devices <br />10 foot <br />lane <br />h <br />Shift <br />L <br />Cone <br />L <br />Merge <br />11 foot <br />lane <br />% <br />Shift <br />L <br />Cone <br />L <br />12 foot <br />Cone <br />lane <br />'/2, <br />Shift <br />L - <br />Cone <br />Shoulder <br />1 /3 <br />Taper <br />L <br />Cone <br />a. <br />.. <br />Cone <br />MPH <br />Merge <br />Cone <br />Merge <br />20 <br />70 ff <br />35 ft <br />3 <br />75 ft <br />5 <br />40 ft <br />3 <br />80-ft <br />5 <br />40 ft <br />3 ., <br />25 ft <br />3 <br />', <br />25 <br />105 <br />6 <br />55 <br />3 <br />115 <br />6 <br />60 <br />4 <br />125 <br />6 <br />65 <br />4 <br />35 <br />3 <br />0 <br />150_. <br />4 <br />165 <br />85 <br />4 <br />180 <br />7 <br />90 <br />4 <br />50 <br />3 <br />6 <br />-75 <br />7 <br />35 <br />205 <br />7 <br />105 <br />4 <br />225 <br />8, <br />115 <br />5 <br />245 <br />8 <br />125 <br />5 <br />70 <br />4 <br />40 <br />270" <br />5 <br />295 z <br />9 <br />-150 <br />5 <br />5 <br />,. 8' <br />135 <br />320 <br />9 <br />160 <br />90 <br />4 <br />45 <br />450 <br />11 <br />225 <br />6 <br />495 <br />12 <br />250 <br />7 <br />540 <br />13 <br />270 <br />7 <br />150 <br />6 <br />50 <br />500, <br />:1 <br />250 <br />6� <br />50 .=� <br />12 <br />i 275 <br />7 <br />7 <br />600 <br />660 <br />13 <br />13 <br />300 <br />7 <br />170 <br />6 <br />55 <br />550 <br />11 <br />275 <br />6 <br />605 <br />12 <br />305 <br />330 <br />7 <br />185 <br />6 <br />;60600 <br />- <br />300 <br />6 <br />- - <br />660 <br />1 12 <br />330 <br />7 <br />720 <br />- <br />j 13 <br />- <br />360 <br />1 7 <br />- <br />i 200 <br />-- <br />6 <br />-�1,, <br />-= <br />- Downstream <br />- --- <br />Taper-100 <br />- <br />feet/lane <br />closed <br />SIGN SPACING <br />Road Work Ahead <br />i <br />�36" x 36 " <br />Flagger Ahead <br />48" x 48" <br />Prepare to Stop <br />36 " x 36 " <br />th t <br />4 sign <br />25 mph or less <br />100 ft. <br />100 ft. <br />100 ft a <br />NIA <br />(I 30 mph <br />_......-----.._._...---- -- ---------- <br />200 ft-- <br />- -- ----- — -- <br />200 ft <br />-- -------...__ -- <br />200 ft <br />_ ._._. , <br />N/A <br />_... _.._._.......... _._..._.__...._..- --- --. _.-.._-.---- - <br />�_ 35-40 mph <br />350 ft. <br />- 350 ft. <br />350 ft. <br />__-- <br />N/A <br />45-55 mph <br />500 ft. <br />500 ft. <br />500 ft. <br />500 ft_ <br />60-65 mph <br />1,000 ft. <br />1,000 ft_ <br />1,000 ft. <br />1,000 ft. <br />Revised 6/1/06 <br />