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nll excavations over d8" deen are Uealed as Type C soil <br /> Use trench box, shoring or 1 V:1.5H sloping_ _ _ <br /> - --- - -- - - ---- _----- - — - -- - <br /> See Safel�xior lo entry for jobs requiring�pe A or Type B veri(icalion____ _ <br /> Undergrow�d ulilities musl be located. Pholograph locates marks i( necessary. <br /> All spoils, malerials and equi ment musl be kept more than 2 feel (rom lhe excavation edges <br /> Shielding/Shorin� tabulaled dala must be kept on sile _ _ <br /> Standing or wee��ing water in the lrench musl be rernoved _ <br /> A ladder musl be available oul of Ihe trench wilhin 25 feet of workers <br /> Almospheric lesling musl be perfonned conlinuously i( there is: <br /> 1. Machinery running lhal could contaminale the trench wilh carbon monoxide (CO) <br /> 2. Underyround slorage tanks or pipelines lhat may have leaked inlo lhe surrounding soil <br /> 3. Known landfill or dump site that could migrale (lammable or noxious vapors inlo lhe trench <br /> Traffic Control Devices <br /> - � 10 (oot lane 11 foot lanc 12 foot lanc Shouldcr <br /> --. - -- - - -- - _ _- -- -_ _ - - --- - - - _ _ <br /> L %, L l %L L %aL 1/3l <br /> ---- - --- ---- -- - - --..�- - - _. -- ___ - ---- - -- - - - -- - _ <br /> MPH Mcrge Cone Shi(t Conc Mcrge Cone Shift Cone Mcrge Conc Shifl Cone Tapur Conc <br /> - - - - -- -- - - - -- - - - _ _ . --- __ _- - - -- - -- --- <br /> 20 ' 70 f! 5 35 Il 3 75(I 5 40 fl 3 80 ft 5 40 fl 3 25 tt 3 <br /> ---- -- - --- -- -- - -- -- -- _ - -- - - ----_ _- <br /> 25 105 G 55 3 115 G GO ! 17_5 6 fi5 4 35 3 <br /> - - -- - --- -- - -- - --- <br /> - _ _ - ---- - - - <br /> -- -- --- <br /> 30 150 G 75 4 165 7 fl5 �! 180 7 90 4 50 3 <br /> --- -- - -- -- -- --- ---- - --- -- ----— --- --—- --- <br /> 35 205 / 105 4 225 t3 115 5 245 8 125 5 70 4 <br /> - --- ----- - ----- - --- - - <br /> ----- ----- ----- --- ------- <br /> 40 ?_70 8 135 5 295 a 150 5 320 � 160 5 90 , 4 <br /> _ -_ _ --- _ _- -- -- -- - ---- -- --- -- - - --- - - - ---- ----- -`- --- <br /> 45 450 11 725 � 495 17 2.`i0 7 540 13 270 7 150 6 <br /> - ---- -- -- - --- - - -_ ..--- - --- --- --- - --- - ------ <br /> 50 500.. 11 250 G 550 " 12 275 7 600 13 300 7 170 6 <br /> _ - __ _ - - -- -- - -_ - - - _ __ __ ._ . - - - --- --- <br /> 55 Ci50 11 275 6 60Ci ll 305 7 Of0 13 330 7 18!i 6 <br /> _ � __ _ -- � <br /> 60 �00�' 11 300 (i G60 12 330 7 710 13 3G0 7 200 G �. <br /> _. _ _ . _ - _ _ _ - _ - -- <br /> Downstream Taper-100 feeUlane closed <br /> I __ . _ i <br /> - - - -- <br /> Road Work Ahead Flac�c�er Ahead �, Prepare to Stop � m <br /> SIGN SPACING 4 sign <br /> 3G" x 36 " 48" x 48" � 36" x 36" <br /> ------ -- - - : ----------- _ _-------'--=-----=-- ---- <br /> � 25 mph or less 100 tL ( 100 (L I 100 fL ! NIA <br /> ----� - -- __ --- ----- -------------- ---- ---- <br /> I 30 m h � 200(t � 200 ft I 200 tt I NIA <br /> i <br /> _ _ - -_ _ _ -. - - -- - -. _ . -- <br /> ( 35-40 mph j 350 fL � 350 fl. 350 ft. NI/1 <br /> I _______ - - - - ----� - --------I ------ — - <br /> 45-Ci5 mph :--- S00 ft. � 500 (L � 500 fL �-- 500 f�. <br /> I---- <br /> � 60-6.'i ntph 1.000 (I. 1.00U II. � _- 1,000 (L � 1.000(t. - � - <br /> Revisod G�VtIC, <br />