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Roadway Crossing Guard Installation
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TM-10-3835-219-14 Hoseline Outfit Fuel Handling 4-Inch Diameter Manual
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Figure   2-8.   Installing   Hoseline   on   Towers   (Sheet   1   of   2).
TM     10-3835-219-14 2 - 9 .   S u s p e n s i o n     o f     H o s e l i n e . a.  General   Aerial   Suspensions   are   the   most   effective   and   readily   installed   means   of   crossing   streams   and deep   gorges   or   ravines.   Suitably   protected   and   secure   suspension   crossings   must   be   used   in   these   cases. Adequate   provision   must   be   made   to   permit   free   passage   of   the   displacement   ball.   For   wide   crossings   a suspension   bridge   should   be   built   to   provide   a   flat   deck   or   floor,   which   will   support   entire   length   of   hose   and eliminate   bends   which   would   occur   if   suspension   cables   were   used.   The   practice   of   laying   hose   across   decks   of actively   used   bridges,   or   suspending   hose   from   bridge   structures,   should   be   avoided   due   to   the   danger   of   fire   in the   event   of   hoseline   failure.   Under   emergency   usage   conditions,   hose   maybe   installed   across   an   actively   used bridge   if   found   to   be   necessary   on   a   calculated-risk   basis.   If   a   hoseline   is   installed   on   an   actively   used   bridge,   it must   be   secured   outside   bridge   structure   on   downstream   side   if   possible.   Crossings   must   not   interfere   with passage   of   ships,   and   must   provide   clearance   from   flood   stages.   The   hoseline   suspension   kit   provides   adequate material   for   one   200-foot-wide   (60m)   crossing   or   two   100-foot-wide   (30m)   crossings.   Construction   of   several shorter   suspension   spans,   or   additional   large   spans,   would   require   additional   stakes,   tackle   blocks,   and turnbuckles. b . S u s p e n s i o n     T o w e r s . W A R N I NG Aerial   crossings   over   rivers   and   streams   must   provide   adequate   clearance   for flood   stages.   Crossings   must   not   interfere   with   the   passage   of   ships   on navigable   waters. (1)  Short   spans.  For   spans   up   to   75   feet   (22.5m),   short   towers   constructed   of   2   x   6   timber   or   similar   material can   be   utilized,   as   long   as   adequate   clearance   is   ensured. (2)  Long   spans.   For   spans   over   75   feet   (22.5m),   towers   must   be   constructed   of   4   x   4   timer   or   similar material   to   provide   adequate   clearance   and   strength. (3)  Use   of   natural   materials.   Existing   trees   may   serve   as   towers   if   they   provide   adequate   clearance.   Trees must   be   a   minimum   of   8   inches   (203.2   mm)   in   diameter,   sound,   and   well-routed   to   serve   as   towers. c.  Installing   Hoseline   On   Towers. (figure   2-8)   After   suspension   towers   have   been   erected,   install   cable   and hoseline    as    follows: (1) (2) (3) (4) (5) (6) (7) (8) Drive   a   guy   stake   (1)   into   ground   approximately   15   feet   (4.5m)   from   each   tower   (2)   in   line   with   and leaning   away   from   both   towers.   Stake   should   protrude   from   ground   approximately   6   inches   (152.4mm). Hang   a   tackle   block   (3)   off   of   each   tower   (2)   and   thread   wire   rope   (4)   through   sheave   on   near   side   stream or    obstruction. Pull   wire   rope   (4)   across   stream   or   obstruction. Thread   wire   rope   (4)   through   tackle   block   (3)   on   far   side   or   stream   or   obstruction. Make   a   loop   (5)   of   wire   rope   approximately   9   inches   (228.6mm)   from   wire   rope   end   and   insert   thimble   (6) into   loop. Secure   wire   rope   end   with   two   clamps   (7)   and   nuts   (8). Place   a   shackle   (9)   onto   stake   (1).   This   may   require   tapping   on   shackle   in   order   for   it   to   slip   around   stake due   to   close   fit   of   shackle   to   stake. Install   shackle   bolt   (10). 2 - 2 6

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