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CCrraannee CCaallccuullaattiioonn TTeemmppllaattee Stage 1: Gross Load Calculation

Stage 2: Crane Utilization

Stage 3: Crane Selection Template

Stage 4: Crane Matt

Calculation Template

Stage 5: Actual Bearing Pressure under Selected Mat

Stage 6 Actual Bearing

Pressure under Selected Mat

Net Load = 5,500 Kg

+ Accessories = 100 Kg

Hook Block = 500 Kg

+ Stored Fly Jib if Used = N/A Kg

Gross Load = 6,100 Kg

Gross Load X 100 Divided by SWL @ the Radius Worked: % (Maximum75%)

Counterweight Used 16 t

Boom Length Used 38.2 m

Length & Angle if Fly Jib Used N/A m deg

Maximum Radius Used 18 m

SWL at Radius Used 8.5 t

Maximum Radius at Boom Length Used 10 m

Outrigger Spread 7000 mm X 8171 mm

Rigged Weight of Crane Plus Ballast 64 t

X0.75% 48 t

+ Gross Load 54.1 t

Divided by Ground Bearing Allowance 10 t /m²

Minimum Area of Mat Required 5.41 m²

Actual Area of Mat Size Used 6.25 m²

Matt Size or Diameter if Circular 2500mm X 2500mm

Resulting Loading: Maximum Point Loading 54.1 t

Divided by the Actual Area of Mat to be Used 6.25 t

Resulting Pressure 8.7 t

Or resulting Pressure from Crane Programme t /m²

Ground Surface i.e Solid, Gravel etc.

Mud, Peat, March 0 t /m²

Cohesive Ground Soft 4 t /m²

Cohesive Ground Firm: This Figure to be used Unless

the Exact Measurement is known (Civil Engineers Report)

10 t /m²

Paving, concrete Plinths, Heavy Duty Roads 50 t /m²

Ground Load Bearing Capability Known t /m²

12m Dia

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60° Angle

60° Angle 11.1m 11.1m 5m 5m

11.1m

X X X X

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Crane Outrigger Template (X 0.75%) Weight of Crane: 40t Weight of Ballast: 10t (Total all up weight of crane 50t) Weight of Load: 5t Weight of Hook /Tackle: 0.8t Crane: 50t X 0.75 + Load 5t + Tackle: 0.8t = 43.3t 43.3t / 25t (ground Pressure) = 1.732 √ 1.732 = 1.316 Pad size 1.3 1.3 1.3

5m

5 x 5 = 25 10 x 10 = 100 125 √125 = 11.1m slings to be used. Divide load weight by 2.1 to get SWL of each sling leg

10m 12 x 75% = 9

9 x 3.14 = 28.26m 28.26 + 10 = 38.26m

Divide load weight by 1.4 for SWL for each sling leg

BBaacckk CCaallccuullaattee PPaadd SSiizzee ((CChheecckk NNeeww PPaadd SSiizzee))

1.6 (100% Outrigger Loading)

1.6 1.6 x 1.6 = 2.56 m² Crane Weight = 48t / 2.56 = 18.75t outrigger pressure on pad

CCaallccuullaattee ffrroomm PPaadd SSiizzee

Pad Size

Area

Outrigger Loadings 55t / 80t Tadano cranes

Based on GVW 45t

10t 20t 30t 40t 50t 60t 70t

1.44 28.645 KN 33,854 KN 39,062 KN 44,270 KN 49,479 KN 54,687 KN 59,895 KN

Outrigger Loading: GVW 45t + load ÷ Pad Area (1.44) X 75% X 10 = Kilonewtons

CCrraannee UUttiilliissaattiioonn:: LLooaadd XX 110000 ÷÷ RRaaddiiuuss Crane Configuration – Radius: 12m – Boom length: 32.4m (Crane can lift 4.5 tons) Crane Utilisation Load 4t x 100 ÷ 4.5 = 88.8% Crane Utilization to high (Complex Lift) You would need to Reduce Boom Length or Reduce Crane Radius Load 4t (@10m) x 100 ÷ 5t = 80.0% Crane Utilization Good (Routine Lift)

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11.. CCrraannee WWeeiigghhtt

TThhee mmaaxxiimmuumm wweeiigghhtt ooff tthhee ccrraannee ttoo bbee uusseedd 5500,,000000kkggss ((wwoorrsstt ccaassee sscceennaarriioo))

22.. LLooaadd

TThhee mmaaxxiimmuumm llooaadd ttoo bbee lliifftteedd 2222,,000000kkggss

33.. OOuuttrriiggggeerr LLooaadd

PPooiinntt llooaadd == ((11++22)) xx 110000%% == ((5500,,000000 ++ 2222,,000000)) == 7722,,000000kkggss oorr 7722tt

44.. GGrroouunndd TTyyppee

GGrroouunndd ccoommeess iinn ggrraannuullaarr aanndd ccoohheessiivvee ttyyppeess..

BBeeaarriinngg VVaalluueess BBSS::88000044

55.. MMaatt ssiizzee

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7722000000 xx 99..8811 == 770066,,332200 kkNNss

770066..33kkNNss // 330000KKNN//mm22 == 22..3355 mm22

== 22..44mm XX 22..44mm mmiinniimmuumm

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wwiillll bbee ppllaacceedd hheerree.. TThhee ootthheerr ttwwoo wwiillll bbee ppllaacceedd oonn mmeeddiiuumm ddeennssee ggrraavveell

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ggrroouunndd bbeeaarriinngg vvaalluuee ooff 330000kkNNmm hhaass bbeeeenn sseelleecctteedd..