structural collapse technician training – ver 3.1
DESCRIPTION
Structural Collapse Technician Training – Ver 3.1. Module : 4 – Part c Lifting & Moving Critical Angles Concrete Anchor Sys Lifting Equipment & Techniques Cranes & Rigging. Jan08. 9Jul12. Critical Angles. Critical Angle Considerations. 120 DEGREES. 500 lbs Tension. 500 lbs Tension. - PowerPoint PPT PresentationTRANSCRIPT
SCT4- c Slide 1
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Structural Collapse Technician Training – Ver 3.1
Module : 4 – Part cLifting & MovingCritical AnglesConcrete Anchor SysLifting Equipment & TechniquesCranes & Rigging
Jan089Jul12
SCT4- c Slide 2
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Critical Angles
SCT4- c Slide 3
National Urban Search & Rescue Response SystemStructural Collapse Technician Training Critical Angle Considerations
120 degrees is 1/3 of a 360 degree circle
120 DEGREES
Load 500 lbs..
Too Flat of Angle for Heavy Lifting
500 lbs Tension 500 lbs Tension
SCT4- c Slide 4
National Urban Search & Rescue Response SystemStructural Collapse Technician Training Critical Angle Considerations
Bigger Angle Reduces Horizontal Force in
Anchors and Tension Force in Sling
Smaller Angle Increases Horizontal Force in Anchors and
Tension in Sling
SCT4- c Slide 5
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Effects Of Sling Angles
As the angle gets flatter, more horizontal force (compression) is generated at the top of the Load
In order to provide the same (500 lb) vertical lift, the sling tension becomes larger, since it must lift + compress the load (or spreader bar)
1000lb 1000lb 1000lb 1000lb
500l
b
500l
b
575l
b 575lb 707lb
707lb 1000lb 1000lb
90 deg 60 deg 45 deg 30 deg
0 lb 288 lb 866 lb500 lb
SCT4- c Slide 6
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Compensating for Loading Steeper Angles
for Faster Currents
When In Doubt, Let It Out
SCT4- c Slide 7
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Concrete Anchors Systems
Wedge AnchorsConcrete Screws
Through BoltsUndercut Anchors
SCT4- c Slide 8
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Wedge Anchors
Have Reduced Capacity in Cracked Concrete
Torque controlled, expansion anchors require clean, proper sized holes, set with Torque Wrench.
SCT4- c Slide 9
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Small Concrete ScrewsHilti, Simpson or Topcon
Use 1/4” to connect
devices - SmartlevelsNeed drill & driver
drill bit in each box use Std. hex driver
Use 1/4” x 1 1/4” for connecting devices I” embedment 175 lb tension
350 lb shear (design load)
SCT4- c Slide 10
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Larger Concrete Screws Size 3/8”, 1/2”, & 5/8”” May use instead of wedge
anchors for light lifting More of Undercut Anchor
Should work better in cracked concrete
Need drill and impact driver Simpson & Hilti easy to drive,
but requires deep penetration Tension or Shear
3/8” screw w/ 3 3/4” embed has strength similar to 1/2” wedge anchors (2000lb Ten & Shear)
SCT4- c Slide 11
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Bolt or rod with double nuts and a large washer
Through BoltSimplest and best but not often possible
SCT4- c Slide 12
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Undercut AnchorsRequires precision hole w / special bit.
when bolt is tightened, prongs extend from bolt to bear on enlarged surface of hole
Not Practical for US&R
SCT4- c Slide 13
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Spacing & edge distance Min edge distance = 6 x diameter of bolt Min spacing = 12 x diameter of bolt Min depth = 6 dia x diameter of bolt Better depth = 9 dia x diameter of bolt
SCT4- c Slide 14
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Strength Reducers
Cracks Too close to edge
Overlap cones - too close spacing
SCT4- c Slide 15
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Ultimate Load vs Design Load Working load = Allowable working load Working load = Design Load Design load = 1/4 ultimate load Design load = 1/5 ultimate for moving
systems Proof load = 2 x working load(Most MFRs do not use the term “Safe”)
SCT4- c Slide 16
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Installation Hole size very important Use metal detector to avoid rebar Need to clean holes, especially for epoxy Torque all expansion bolts = test Adhesive anchors require very clean hole, set
time, and limited vibrationAcrylic, get initial set in 7 min & full cure in 35 min.
at 60 degrees F Also Acrylic can be set under water and at 0
degrees F Concrete screws require drill bit & driver
SCT4- c Slide 17
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Installation of Hoist Ring & Wedge Anchor
SCT4- c Slide 18
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Hammer Anchor into place Make sure that hammer strikes nut, not top of anchor
SCT4- c Slide 19
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Torque Anchor To 50 Ft-lb
SCT4- c Slide 20
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Difficult to know the concrete’s ability to hold itself, use caution when using bolts.
SCT4- c Slide 21
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Lifting Devices Steel Swivel Hoist Rings/Hooks Eye Nuts Steel Angles
Used only when a better way of connecting to concrete is not available. (Sling, strap, or wire rope choker is not practical).
SCT4- c Slide 22
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Steel Swivel Hoist Rings
SCT4- c Slide 23
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Steel Swivel Hoist Rings Pivot 180 deg & swivel 360 deg Usually are proof load tested Use with wedge anchor
Remove machine bolt (replace after use)Torque required for wedge anchor is
greater than torque listed for Hoist Ring but works fine for better quality Hoist Ring.
Don’t buy Hoist Rings w/o testing them, (buy only from known manufacturer)
SCT4- c Slide 24
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Swivel Hooks Use with shackles
to create connection points.
Prevents load from spinning, twisting sling legs
SCT4- c Slide 25
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
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
SCT4- c Slide 26
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Eye Nut Strength Reductions(not the shackle)
100% strength at 0 deg
30% strength at 45 deg
0% strength at 90 degNot Recommended
SCT4- c Slide 27
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Steel Angles Must be engineered Need minimum of two anchor bolts Use only if other methods are not available
2000lb
L3x3x1/2x0-9
6” 1 1/2”
1” holeTwo -1/2” wedge anchors9/16” holes
Could use 2-3/8 x 4” concrete screws, 2000lb lift
SCT4- c Slide 28
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Steel Tee Use with 1/2”x 5 ½ ” Wedge Anchors or
3/8”x 4” Screws Best for tension loads but may be loaded in
shear as shown 2000lb *
WT3x7.5x0-42- ½”x 5 ½” Wedge Anch. in 9/16” holes
1 ½”
3 ½”
13/16” hole
* = value of wedge anch is reduced due to spacing
2000lb
SCT4- c Slide 29
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Rigging Tools
SCT4- c Slide 30
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Wire Rope TermsWire rope Rope core:
FC, IWRC, WSC
Strand wire
SCT4- c Slide 31
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Wire Rope Inspection Should be done on regular basis Check for:
Broken wires - depends on locationCrushed strandsKinks, bird caging, & protruding coreStretch, diameter reductionAbrasion and corrosionFatigue and electric arc
SCT4- c Slide 32
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Kinks Bird Cage Popped Core
Wire Rope: Discard Conditions
SCT4- c Slide 33
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Rope stretchreduce diameterand increase lay
Core failurestrands bind and take oval shapelay angle
increases
Wire Rope: Discard Conditions
SCT4- c Slide 34
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Wire Rope Loop Terminations
Flemish Eye
(95%)
Fold BackEye
(Don’t use for lifting)
Wire Rope Clips U bolt & Fist Grip
(80%)
SCT4- c Slide 35
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Cable Clips – and Thimbles
Clips are installed in succession & torqued per Manufacturers Instructions.
Example shows loop end w/ & w/o thimble.
Need Seizing at rope endOne clip
width
SCT4- c Slide 36
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Turn back, place 1st clip & tighten
2nd clip only snug Place other clips
at equal spacing Apply tension and
tighten clips Recheck nut
torque after initial operations
Cable Clip - Installation
See Crosby Panel 16
SCT4- c Slide 37
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Chain Sling Identification There are two types of
Alloy Lifting Chain Grade 8 & Grade 10 Marking; A, T, 8, 80, or
800, for 10 mark = 10 or 100
Only use these grades of chains for US&R Lifting
SCT4- c Slide 38
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Chain Twisted Gouged stretch links links
Chain Sling Problems
SCT4- c Slide 39
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Nylon & PolyesterWeb Slings
Unilink fittings Triangle and choker fittings Triangle fittings both ends Flat eye on both ends Twisted eye on both ends Endless (grommet) Endless with reverse eyes Note tag
SCT4- c Slide 40
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Synthetic SlingsWeb and Round
SCT4- c Slide 41
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Synthetic Sling Types Nylon.
General purpose, unaffected by grease & oil, many chemicals except acids.
Loose 15% strength when wet. Polyester.
Unaffected by most chemicals including mild acid and water. Disintegrate in sulfuric acid.
Aramid, Kevlar, Dacron, Nomex.Resistant to most weak chemicals.
High density polyethylene.Resistant to most chemicals.
SCT4- c Slide 42
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Synthetic Slings Must include manufacturer’s sewn on tag Gives fiber type and safe working load
Provided with protective cover - seamless Use corner protection Need careful inspection Do stretch - up to 10% ; polyethylene = 1% Very light weight and easy to use Minimize twisting & spinning during lifting
SCT4- c Slide 43
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Sling Arrangements Single vertical hitch Basket hitch Choker hitch Double basket hitch Double choker hitch Bridle hitch
SCT4- c Slide 44
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Vertical1 X cap
Basket2 X cap
Choker3/4 X cap
Capacities assuming sling angle = 90 deg (vertical)
Sling Hitch Types
SCT4- c Slide 45
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Single Basket HitchMost efficient when H is as
large as L(When legs are near Vertical)
SCT4- c Slide 46
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Double Basket Hitch
Much better Control of Load
SCT4- c Slide 47
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Single Choker HitchEndless, synthetic round sling
Gives same effect as a Double Choker
SCT4- c Slide 48
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Double Choker Hitch
Much better Control of Load
Enclosed angle should not be more than 90 deg for all Chokers
SCT4- c Slide 49
National Urban Search & Rescue Response SystemStructural Collapse Technician Training Wire Rope/Chain TightenersTurnbuckle
Load Binder
SCT4- c Slide 50
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Safety IssuesWorking Load = 1.5 to 3 tons
Inspect carefullyDo not use Handle Extender
Portable Cable WinchCome a Long
SCT4- c Slide 51
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Grip - Hoist TU-32
4,000 pound capacity uses 7/16 wire rope
TU-28 8,000 pound
capacity uses 5/8 rope
SCT4- c Slide 52
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Up to 6 tonwt to 80 lb
Up to 5 tonwt to 84 lb
Up to 6 tonwt to 46 lb
Chain Hoists, Falls, & Ratchet Levers
SCT4- c Slide 53
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Turnbuckles
Eye Jaw HookHook end is from 1/2 to 2/3 as strong as EYES.F.=5, Take-up = 24”max, Need Inspect
SCT4- c Slide 54
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Shackle TypesUsed for straight pulls & chokers
Screw Pin
Use thesemostly
Round Pin
hard toplace key
Safety Type
Too slow &danger ofwrong bolt
Screw Pin
Chain Type
Also is special Screw Pin Type for Synthetic Slings
SCT4- c Slide 55
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Shackles
SCT4- c Slide 56
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Shackle at Hook or ChokerWashers can be used as spacers at hook - hangs more evenly
YES - pin can’troll under load
NO - moving rope canunscrew pin
SCT4- c Slide 57
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Incorrect Uses of Shackles
SCT4- c Slide 58
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
CRANES
SCT4- c Slide 59
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Cranes used for Collapse Rescue Pre-incident information.
List of resources available in your area.
Develop a telephone call-up list.
Know projected response times.
SCT4- c Slide 60
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Cranes used for Collapse Rescue Hydraulic Truck Crane Rough Terrain Crane Lattice Boom Cranes
Truck MountedCrawler Mounted
Need 1000’ square feet of area to operate most cranes. (35’ x 35’)
Need much larger area to setup most larger cranesEspecially Lattice Boom CranesCrawlers require most space since they
arrive with many trucks
SCT4- c Slide 61
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Hydraulic Cranes On mobile chassisSome AWD & AWS
Uses outriggers Self-contained Fast to set up Rated by lifting
capacity in tonsAt 10 ft radius
Variable length boom
SCT4- c Slide 62
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Referred to as RT or pick and carry crane
Have “on rubber” capacity rating
Are trucked to site More adapt to
traveling on uneven surfacesNeed to be level to lift
Rough Terrain Cranes
SCT4- c Slide 63
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Components usually hauled on several trucksRiggingJibCounterweightBoom
Determine boom length at initial setup
May be Truck or Crawler
Lattice Boom Cranes Conventional
SCT4- c Slide 64
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Maximum lifting capacity is reduced the farther the crane is from the load.
Cranes are considered complex machines that combine multiple simple machines.
Crane is Complex Machine - Internally
SCT4- c Slide 65
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Crane Stability - Simple Lever
L2 X W2L1 x W1
Big Weight x Small Dist. = Small Load x Big Dist. (Resisting Moment) (Load Moment)
SCT4- c Slide 66
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Lattice Boom Crane
Counter Weight
Change of Direction Pulleys
Main/Traveling Block
SCT4- c Slide 67
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Rescue / Crane Operations
SCT4- c Slide 68
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Lifting Quadrants Over Front, Sides, Rear
May have different ratings (some are same 360 deg) Cranes ability to counter balance
Similar to a Load Chart for Aerial Ladder Truck
Over Side
Over Side
Over Front
Over RearOn O.Riggers On Rubber
Over Side Over
Side
Over Rear
Over Front
SCT4- c Slide 69
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Lifting from the Whip Line Headache Ball and Anti-
Two Block Set Rigged as a Single Line
Load moves faster, but more difficult to control small movement
Limited to capacity of one wire rope
Periodically inspect the wedge socket for slippage
SCT4- c Slide 70
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Lifting from Main BlockSometimes called Traveling Block The larger the number of lines, the greater the
capacity, but the load moves slower With more lines, easier control of small
movement 4 Part Line2 Part Line
SCT4- c Slide 71
National Urban Search & Rescue Response SystemStructural Collapse Technician Training Crane with multi-line setup Main Block & Whip Line
Main/Traveling Block is Rigged as a 4:1 = 4 Part LineMay be 6 part or more
Whip Line = Single Line Operator must take care so
Single Line does not get tangled around Main LinesCan be caused by Rapid Swing
of Boom
SCT4- c Slide 72
National Urban Search & Rescue Response SystemStructural Collapse Technician Training Moving the Load / Rigging Tactics Securing the
Load Adjusting the
Rigging Placement of
the Load Removing the
Equipment
SCT4- c Slide 73
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Lifting or Moving a LoadFunctions to be Addressed Center of gravity – Uniform Density Load stability - Fluids
wedges & cribbing Estimating Load weight Lifting Functions
critical angleShoot for a 45 degree sling angle
SCT4- c Slide 74
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Adjusting the RiggingCheck that all
slings/hooks/connector are free of twists and are aligned in direction of pull
Any unused sling legs must be secured
Load should not jump from ground, slow controlled moves
SCT4- c Slide 75
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Checking the Balance As the load
leaves the ground it will shift and locate itself directly below the hook
As tension is applied stand clear of the load keep hands and feet clear
SCT4- c Slide 76
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Checking Center of GravityIf load does not
come up level, sit it down and relocate more directly over CG
The part of the load that comes up last indicates the direction to shift the rigging & hook
After moving hook, recheck sling legs
SCT4- c Slide 77
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Sling Leg Adjustment May need to change
the type of hitch used to shorten or lengthen
Use softeners as needed
Change attachment points, by moving closer in or farther apart
SCT4- c Slide 78
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Rules of Thumb Leg of Sling 30 deg
to flat, double the load
Leg of Sling 45 deg to flat, 1 ½ time the load
Choker de-rates sling 25%
Lose 50% rating of rigging when bending rope around of equal or less than diameter
Figure Multi-leg bridles to lift on no more than 2 legs
Chains too brittle below 32 deg F
Work from top to bottom, trace out Load Paths
Crib around the victim
20 Feet from Electric wires
SCT4- c Slide 79
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Common Rigging Considerations Double “T” Wood Trusses No Rapid Swinging Using Rigging as Shoring Obtaining a gap for slings Don’t Move a disaster from one spot to
another, block load when landed
SCT4- c Slide 80
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
SummaryLifting or Moving a Load Center of Gravity Load stability
Wedges, cribbing & ropes
Estimating load weight
Rating of rigging Place to land load Load clear to be
lifted
Load de-energizedShifting centers of
gravity (fluids)Can the piece
being lifted hold it’s own weight?
Can you stabilize load where it lands?
Hands & Feet
SCT4- c Slide 81
National Urban Search & Rescue Response SystemStructural Collapse Technician Training Requesting the Appropriate Crane Estimate the potential load.
Find the heaviest thing to lift and measure the distance to it from the center of where you will spot the crane.
The greater the distance, the larger the crane. Provide access to the scene. The bigger the crane the longer the response,
set-up time, and setup area needed. Answer 20 questions, use US&R Crane Forms.
CU-1 to help when ordering a craneRAP as planning tool and hand-off info at shift change
SCT4- c Slide 82
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Basic Requirements Related to on-scene Crane Operations Assign Heavy Equip & Rigging Spec (HERS) +
Rescue Leader as Crane Liaison. Prepare for Crane Operations.
Pick best location to locate & to setup.Clear debris from set-up area.Determine weights of critical pieces to be moved
Get help from Structures Spec
Must have knowledge of hand signals.
SCT4- c Slide 83
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Safety Rules Know Weight Know C.G. Know Rigging Ratings Inspect Before Use Use Softeners Allow for increased
Tension when loaded Once a Choker is loaded
do not force hitch down
Allow low D/d for wire rope Reduce ratings for chokers Only use Grade 8 or equal
chain Use Tag Lines as needed Stay Clear of Lift Lift a couple of inches and
re-check Start & Stop Slowly
SCT4- c Slide 84
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
More Rules Watch for Obstacles Only One Person Signals Use known Hand Signals Know Swing Radius of Crane Keep Lift Line Vertical Allow for Wind Loading, No Lifts if Wind
greater than 35mph (Special Care over 25mph) Respect your Gut Feeling Keep Alert
SCT4- c Slide 85
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
FEMA US&R Crane Use Form CU-1Intended to be useful when ordering CranesMay need one for each Crane
SCT4- c Slide 86
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
FEMA US&R Rigging Action Plan – RAP
Intended to be re-done each Operational Period.Also useful to hand-off info to next shift
12
etc
Load data 1
Sketch that locates loads by number
Load data 2
SCT4- c Slide 87
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Crane Hand Signals These are basic
signals Riggers use slang and
body language Concerns hoist and
boom travel Up, down, left, and
right Stand where crane
operator can see you
SCT4- c Slide 88
National Urban Search & Rescue Response SystemStructural Collapse Technician Training Use Hand Signals to Guide Movement Use of these hand signals in the
positioning a Ladder Co’s Aerial Ladder Raising & Lowering Loads with Rope Raising & Lowering Loads with
Levers/air Bags Use Tag Lines to Control the Load Raise Load, Lower Load, Stop, Lock off, Extend Boom, Retract Boom
SCT4- c Slide 89
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Summary Gravity Center of
Gravity Mass
&Equilibrium Friction Mechanics,
Energy, Work & Power
Moment of force Mechanical
Advantage
Inclined Planes & Levers
Pulleys A-Frame Gantry Air bags Wedges &
Cribbing Calculating
Weights Anchor
Systems & Lifting Devices
SCT4- c Slide 90
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Summary Wire Rope Wire Rope
Inspections Wire Rope
Fittings and Terminations
Sling types, Chain & Synthetic
Sling Arrangements
Wire Rope Tighteners
Eye Bolts & Shackles
Types of Cranes Considerations
for Crane use Crane hand
signals
SCT4- c Slide 91
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Manual Lifting & Moving Station
SCT4- c Slide 92
National Urban Search & Rescue Response SystemStructural Collapse Technician Training Crane Operations & Bolting Station
SCT4- c Slide 93
National Urban Search & Rescue Response SystemStructural Collapse Technician Training Air Bags, Lifting & Stabilization Station
SCT4- c Slide 94
National Urban Search & Rescue Response SystemStructural Collapse Technician Training
Conclusion of Part c Questions? Discussion?
Next: Practical Rotations