Heavy Equipment & Rigging Specialist Training Module 1 Unit 4: Intro to Rigging May08 1
Key Points Review of Exercise Goals Discuss Rigging Components Language of Crane Signals Review Anchor Installation 2
Initial Discussion Additional Introduction Intent is to work safely and bring all up to the same level Work as a Team at field stations Need to become familiar with crane at each station Hazard Zones Crane Chart in Cab 3
Role of Rigger - Working Together HERS relationship with Crane Operator and Rigger HERS interaction with Rescue & Structures Spec 4
Rigging Components Wire Rope Slings Synthetic Slings Chain Shackles 5
Wire Rope Slings Standard: Improved Plow Steel (IPS) or EIPS 6 x 19 or 6 x 37 Capacity based on end terminations Mechanical Splice 95% efficient Flemish eye Most common and strongly preferred Crosby Loops Discuss later 6
Wire Rope Loop Terminations Flemish Eye (95%) Fold Back Eye (Don t use for lifting) Wire Rope Clips U bolt & Fist Grip (80%) 7
Synthetic Slings Must include manufacturer s sewn-on tag Provided with protective cover seamless Use Corner Protection Need careful inspection Do stretch up to 10%; polyethylene = 1% Very lightweight and easy to use Minimize twisting and spinning during lifting Capacity in FOG, not Crosby s User s Guide Use manufacturer s tag for capacity 8
Polyester Round Slings Note adjuster for sling length Use manufacturer s tag for capacity Standard TF cache has Four 10' 17,000-lb choker capacity = W L L Four 20' 17,000-lb choker capacity = W L L 10 footer weighs 11 lb Similar cap wire rope 25 lb 9
Chain Sling Identification Chain Links Master Link ID Tag Two types of alloy lifting chain Grade 8: has mark A, T, 8, 80, or 800 Grade 10: has mark 10 or 100 Use only alloy lifting chain for US&R lifting 10
3 Factors Influence Sling Capacity Material Hitch type Sling angle 11
Sling Hitch Types Vertical 1 X cap Basket 2 X cap Choker 3/4 X cap Capacities assuming sling angle = 90 deg (vertical) 12
Sling Angle Measured from horizontal Preferably 60 deg At least 45 deg Never less than 30 deg Load capacity is reduced from full sling capacity by ratio of H/L 13
500lb 500lb National Urban Search & Rescue Response System Effect of Sling Angles At angles less than 90 degrees the force in the cable & on the connections is greater (don t forget induced horizontal force) 250lb 500lb 866lb 1000lb 1000lb 1000lb 1000lb 90 deg 60 deg 45 deg 30 deg 14
Shackle Types Used for straight pulls & chokers Screw Pin Round Pin Safety Type Screw Pin Use these mostly hard to place key Too slow & danger of wrong bolt Chain Type Also is special Screw Pin Type for Synthetic Slings 15
Crosby Panel 12 Shackles & Hooks Best to use Forged-Quenched & Tempered W.L.L. is stamped into Shackle/Hook body (S.F. = 6/1 - Carbon & 5/1 - Alloy Shackles 4.5/1 Hooks) 16
Crane Signals Discuss more tomorrow Hand and Voice Is Language with different dialects Needs emphasis Need to understand how crane moves load to know what you are asking for 17
Crane Signals how does the load move? Horizontally Boom Moves in Arc Not Left and Right Vertically When Boom out Load parallels Boom 18
Hand signals should be found on the side of every crane cab Basics: Finger = Hoist Thumb = Boom Arm = Swing 19
Crane Hand Signals (continued) 20
Components of Tiebacks Crosby Clips Swivel Hoist Rings Anchors 21
Cable Clips and Thimbles One clip width Need Seizing at rope end Clips are installed in succession & torqued per Manufacturers Instructions. Example shows loop end w/ & w/o thimble. 22
Cable Clip - Installation Turn back, place 1 st clip & tighten 2 nd clip only snug Place other clips at equal spacing Apply tension and tighten clips Recheck nut torque after initial operations See Crosby Panel 16 23
Wedge Anchors- Torque Controlled Require reasonably clean & proper sized holes Set with Torque Wrench (pre-tests anchor) Have Reduced Capacity in Cracked Concrete 24
3/8 Concrete Screws May use instead of wedge anchors for Hoist Ring Work better in cracked conc. Need drill & simple wrench Simpson & Hilti easy to drive, requires 10 x dia. Penetration Drill hole 1 longer than reqd depth (only need minimal cleaning) Strength similar to ½ Wedge Anch. 25
Steel Swivel Hoist Rings 26
Eye Nuts Attach over nut of installed wedge anchor Load in tension only (within 15 deg.) Capacity determined by anchor and depth Tightened eye to nut 27
Quick Quiz Quiz was provided by The Crosby Group 28
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Questions? Start at 0730 tomorrow 38