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Discussion_ Design Concepts
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Design Analysisjib Crane
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Design of behavior behavior of jib crane
Design and behavior of jib jib crane
Zhen S un, Abdul
Abstract
A jib crane is a type of crane of crane where a horizontal member supporting a moveable hoist, is fixed to a wall or to a pillar. Jib cranes are used in industrial premises and on The jib The jib may swing through an arc, to give additional later or be fixed. Similar cranes, often known simply as hoists, the top floor of warehouse of warehouse buildings to enable goods floors.
Design of jib jib crane for Canadian applications is based Manufacturers Association of America) of America) specifications Top Running and Under Running Single Girder Electric Traveling Cranes Utilizing under Running Trolley Hoist structure components design of jib jib crane should follow structure design code which is Handbook of Steel of Steel Constr
Design of jib jib crane includes structural design, mechanica electrical equipment design part. In this case, it focused design for jib for jib crane, such as steel girder, steel mast, base design.
(Source: Google)
For:
Dr. Stiemer CIVL 510 University of British of British Columbia
By:
Development of a of a formatted spreadsheet application spreadsheet template for tension member, compression bolts connection.
ZHEN SUN (83204081) ABDUL WAJID (83210088) QIJUN CHANG (83263087)
Date:
April 22, 2010
Design of behavior behavior of jib crane
CIVL CI VL 510
4/28/2010 4/28/2010
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Table of Contents of Contents
Design and behavior of jib jib
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Design and behavior of jib jib crane.............................................................. crane .............................................................. Abstract ................................................................................................ Table of Contents of Contents ................................................................................. Table of Figures of Figures .................................................................................... 1.0 Introduction ................................................................................... 2.0 Background .................................................................................... 3.0 Applications of jib jib crane................................................................. crane ................................................................. 4.0 Canadian design code .................................................................... 5.0 Design example .............................................................................. 6.0 Spreadshhet applications ............................................................. 7.0 Conclusion .................................................................................... 8.0 Bibliography ................................................................................. Appendix A: Spreadsheet Application................................................ Application................................................ Spreadsheet application screenshot .............................................
Zhen S un, Abdul
1 1 2 2 3 3 5 5 8 13 13 14 14 15
Table of Figures of Figures
Figure 1: Free standing jib standing jib crane ........................................................... 3 Figure 2:.Wall mounted jib mounted jib crane ............................................................. 3 Figure 3: Wall bracket jib bracket jib crane................................................................ crane ................................................................ 5 Figure 4: Mast style jib style jib crane ................................................................... 5 Figure 5: Round mast design for free standing jib standing jib crane. ........................ 9 Figure 6: I‐shape mast design for wall mounted jib mounted jib crane.................. 10 Figure 7: I‐shape mast design for mast style jib style jib crane ........................... 10 Figure 8: Tie rods picture........................................................................ picture ........................................................................ 13 Figure 9: Wall bracket connection picture ............................................. 13
Design of behavior behavior of jib crane
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DESIGN AND BEHAVIOUR OF JIB CRANES
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DESIGN AND BEHAVIOUR OF JIB CRANES 1.0 Introduction
A cantilevered beam with hoist and trolley. The lifting device may pick up loads in all or part of a circle around the column to which it is attached and are made of rolled steel I‐beams.
A jib crane is a type of crane where a horizontal member ( jib or boom), supporting a moveable hoist, is fixed to a wall or to a floor‐
mounted pillar. Jib cranes are used in industrial premises and on
(Source: http://www.jherbertcorp.com/crane‐ jib.htm)
military vehicles. The jib may swing through an arc, to give
Free standing Jib Cranes is directly fixed on the floor support to keep it upright. To maintain its stability and it you fix it to a foundation of 3 to 5 feet deep and up known simply as hoists, were fitted on the top floor of warehouse square foundation base. The foundation depends on buildings to enable goods to be lifted to all floors. You're Reading a Preview Advantage of this type of crane is it doesn’t need a supp structure and provides optimal range of span and contro 2.0 Background Unlock full access with a free trial. wall mounted cranes and other types of Jib cranes. The 2.1 HISTORY OF JIB CRANE shows a 2 ton free standing jib crane used in a yard envir In 1934, Mr Gibb, of Aberdeen accompanied by Mr Mitchell, of additional lateral movement, or be fixed. Similar cranes, often
Inverness, inspected the harbour, and Mr Telford being consulted, plans Download were drawn for its reconstruction. At this work travelling jib crane was used. First actual jib crane was used by The David Round Company in 1869.
With Free Trial 2.2.2
Wall mounted jib crane
2.2 TYPES OF JIB CRANES 2.2.1
Free standing jib crane.
(Source: http://www.jherbertcorp.com/crane‐ jib.htm)
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Wall mounted jib crane. Like the name suggests this kind of jib crane is
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Wall mounted jib crane. Like the name suggests this kind of jib crane is fitted onto the wall. It requires very little headroom, so it can be fitted very close to the underside of roofs etc. to provide maximum lift for your hoist. The coverage like other types of cranes is circular and generally around 20 feet. But it requires a strong wall or column structure to fit it and degree of rotation is lesser than that of Mast style and free standing jib cranes. This crane is very efficient way to move material when floor space is not available and digging a foundation for the crane is not feasible. 2.2.3
Wall bracket jib crane
You're Reading a Preview (Source: http://www.jherbertcorp.com/crane‐ jib.htm)
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(Source: http://www.jherbertcorp.com/crane‐ jib.htm)
This crane is similar to wall mounted jib cranes but with a bracket. It’s a most economical means of providing hoist coverage for individual use in bays, along walls or columns of plants. The installation requirements and load and rotation are like the wall mounted crane. Use a lot for swinging around obstacles and over obstructions. 2.2.4
2.2 WORKING OF JIB CRANE The underlying layout of a jib cranes consists of a solid to a fixed pivot point. In turn, this pivot is securely moun or on top of a freestanding column. This pivot moves 180 or 360‐degree rotation, and a wide arc of operation. performed by an incorporated pulley or motorized chain can slide along the book and offer a large footprint of standing and mast type jib cranes offer 360‐degree rotat mounted types offer 200‐degree rotation.
Mast style jib crane
Design of behavior of jib crane
CIVL 510
This is similar to free‐standing jib cranes but doesn’t foundation making it more economical. But they do requ topTrial and bottom. They also provide a full 360 degree With the Free depending on the manufacturer and maximum amount use of available headroom and allows specific placemen clear obstructions.
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3.0 APPLICATIONS OF JIB CRANE Jib cranes are arranged, for example, in shipbuilding yards for use
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According to CMAA Page‐14, Dead load factor equals load factor equals to 0.15.
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3.0 APPLICATIONS OF JIB CRANE Jib cranes are arranged, for example, in shipbuilding yards for use
in transportation of heavy burdens.
Design Analysisjib Crane
A jib crane is provided which can prevent an unexpected movement of a burden and can sufficiently ensure the safety of a burden handling work.
The major strength is its stability and flexibility of the device.
It is ideal for lifting a product to or from material handling system
Zhen Sun, Abdul
According to CMAA Page‐14, Dead load factor equals load factor equals to 0.15. Inertia forces from drives: the inertia forces occur during deceleration or crane motions and depend on the drivin torques. IFD equals to 2.5% of the vertical load. Loads calculation for jib crane: (Crane in regular use under principal loading) DL (DLFB) +TL (DLFT) + LL (1+ HLF) +IFD (Inertia Forces Test Loads will be 125 percent of related load.
to a work station or machine.
Jib crane is commonly used for workstation and simple loading/unloading operations where it is not necessary to spot a load precisely.
4.3 Girder design: Based on HSC page 5‐157, beam diagr formulae No.32, simple beam‐ two equal concentrated see the equation below:
Jib cranes most often handle lighter loads at lower duty cycles than their bridge and gantry crane counterparts.
You're Reading a Preview
Unlock full access with a free trial. 4.0 Canadian Design Code Download 4.1 Capacity for Jib Crane The maximum weight of the application should match and not exceed design weight. The capacity rating is based on a design load which includes the capacity rating of the crane plus 15% of the capacity for the weight of the hoist and trolley, 25% of the capacity as an allowance for impact. The deflection is based on a design load which includes capacity plus 15% of capacity for the hoist and trolley.
With Free Trial
And then, it is easy to get the maximum bending momen section. Design check:
4.2 Loads on Jib crane: (CMAA Page ‐13) Trolley load: the weight of the trolley and equipment attached to the trolley. Dead load: the weight if all effective parts of the bridge structure, the machinery parts and the fixed equipment supported by the structure. Lifted load: The working load and the weight of the lifting devices Vertical inertia Forces: Dead Load Factor + Hoist Load Factor.
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And clause 13.8.3 applies: All classes of sections except 2 sections of I Shaped Members, which require resisting
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And clause 13.8.3 applies: All classes of sections except 2 sections of I‐Shaped Members, which require resisting moments and an axial compressive force, should follow: Using in the free standing jib crane’s column design:
Value of U1:
Values of ω1:
You're Reading a Preview
M 0.9 Z 12F
Unlock full access with a free trial.
For steel E=200000 MPa Download And for biaxial bending, the member shall meet the following requirement which is
With Free Trial
M M 1.0 M M
The girder’s spreadsheet can be used to check girder section.
4.4 Column design: based on HSC page 1‐35, clause 13.8.2 applies: Class 1 and Class 2 sections of I‐Shaped Members require to resist both bending moments and an axial compressive force should follow: Using in the wall mounted jib crane’s column design:
Design of behavior of jib crane
CIVL 510
Bearing in bolted connections:
B 3 tdnF
The compression member spreadsheet can be used to design.
4.5 Bolts connection design Bolts connection is recommended to use for larger spans because of shipping considerations. Stiffeners are welde the point where wall brackets are connected to stiffen beam.
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4.7 Anchor rods for the base plate 1. The factored tensile resistance of an anchor rod shal
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4.7 Anchor rods for the base plate 1. The factored tensile resistance of an anchor rod shal
Bearing in bolted connections: , Bolts in shear: Vr=0.6ΦbnmAb Fu, Bolts in Tension: Tr=0.75ΦbnAbFu, Bolts in combined shear and tension: (Vf / Vr) 2+ (Tf /Tr )2 1, Bolts in slip‐critical connections: ,
B 3tdnF
T AF Where: 0.67 A= the tensile area of the rods = d0.938P for metric rods . = d for imperial rods Φ
Φ
V 0.53ckmnAF Connections in combined shear and tension: 1.9 1.0.
Therefore, bolt connection spreadsheet can be used to check bolt grade for the connection.
4.6 Tension members design: (shear lag design)
Design Analysisjib Crane
π π
Where: P= the pitch of thread, mm n=number of threads per inch 2. Anchor rods in bearing The factored bearing resistance of an anchor rod shall Φ 3. Anchor rods in shear The factored shear resistance of an anchor rod shall be You're Reading a Preview Φ When the rods threads are intercepted by the shear Unlock full access with a free trial. shall be taken as 0.70 . shear resistance 4. Anchor rods check in shear and tension:
B 1.4 Af ,
V 0.60 AF
V
Trial Download With Free
1.
Anchor rods are not required at base plate for concentri columns carrying gravity loads only since neither end horizontal forces are present. Anchor rod holes in base plates which will receive ancho grouted may be flame cut. Anchor rod hole sizes will vary with individual fabricators shop and field practices.
4.8 Base plate design:
The tension member spreadsheet can be used to check.
Design of behavior of jib crane
4.8.1 The loaded base plates the required bearing area about equal to the area bounded by the column dimensi Plate thickness:
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Design of behavior of jib crane
Use 20% of the sum of the lifted load and trolley (see Table 2.1 of CMAA page 4), equally distributed to each side.
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5.4 Column design
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Design of behavior of jib crane
Use 20% of the sum of the lifted load and trolley (see Table 2.1 of CMAA‐page 4), equally distributed to each side. Side thrust=20% of combined weight of lifted load and trolley=0.2*(4.4+85.84) =18.05 KN=4.51 KN/wheel. Ratio of side thrust to maximum wheel load= 4.51/110=0.041 Specified moment MH due to side thrust: MH=0.041*322.65=13.2 KN*m Factored moment due to side thrust: MHF=1.5*13.2=19.9 KN*m
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5.4 Column design Cf =139.3 KN Mfx= 139.3*2.99= 417 KN*m 1. For the free standing jib crane, try the column
123kg/m, D=406.4mm, t=12.7mm, r=139mm. Dead
1.206 KN/m. Column height= 3.658m
5.3 Girder design For the free standing jib crane, make assumption for the beam design, span length is 20 inch (6.096m). Using the girder design formulation, according to CISC‐ page 4, make assumption that maximum wheel load of per wheel is P= 110 KN which include impact.
You're Reading a Preview Unlock full access with a free trial. (Source: http://www.jherbertcorp.com/crane ‐ jib.htm) Try a HS406*13 column
Download With Free Trial
0.56096 2990mm, Based on crane wheel base a = 232mm < (2 √ 2)*6096=3570mm, So the M 1 = . 6.096 322.64 KN R V P2 110 2 216KN, M 322.65 KNm. And M due to impacting= 322.65*0.25= 80.66 KN*m MD 2.536.096 . 11.75 KN*m Therefore, factored moment M 1.2511.75 1.5 322.64 80.66 619.64 KN*m The point of maximum bending moment is at ‐
Design check W920*238, after using the spreadsheet to check, it is OK.
Design of behavior of jib crane
CIVL 510
It is OK. 2) Overall member strength
1) Cross‐sectional strength From Table of Factored Axial Compressive Resistance, 621 KN. From Table 4‐6, page 4‐18, ω
1.0 26.3,
From table 4‐7, page 4‐19,
1.0
CA 2810 MP (by interpo a
Euler buckling load. Ce= 2810*15700mm2= 44117 KN,
. 0.003, from Table 4‐8, page 4‐20, U . 1.003, therefore, U = 1.003 . . Accordingly, 0.0280.675 0.703 1x
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. 0.002, from Table 4‐8, page 4‐20,
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. 0.002, from Table 4‐8, page 4‐20, U . 1.002, therefore, U = 1.002 . .. Accordingly, 0.030.6 0.6
It is OK. 2) Overall member strength
1.0 26.3, from Table 4‐4, page 4‐13, C ⁄A 298, for
1x
Fy=345 MPa , Cr=Crx= 298*15700=4679 KN (for uniaxial strong‐axis bending), U1x= 1.003
It is OK. 2) Overall member strength
. . 0.030.675 0.705 1.0 ,
1.0 21.3, from Table 4‐4, page 4‐13,
Therefore,
It is OK. 3) Lateral‐ torsional buckling strength Cr=Cry=4679 KN, Mr=621 KN*m, U1x= 1.0
Fy= 345MPa , Cr=Crx= 303*15000=4545 KN (for uniaxial strong‐axis 1.002
. . 0.030.671 0.701 1.0 ,
. .. 0.0310.6 0.631
Accordingly, It is OK.
Design Analysisjib Crane
Therefore,
You're Reading 2. For the wall mounted jib crane, try the I‐shape column W310*118, 2 column height is 2900mm, r=136mm, A=15000mm .
It is OK. 3) Preview Lateral‐ torsional buckling strength a Cr=Cry=CrL=3850 KN, (by interpolation, table on HSC page L=2900 mm , Mrx=606 KN*m, U1x= 1.0
.L .4920mm . Accordingly, 0.0360.585 0.62
Unlock full access with a free trial. It is OK.
Download With Free Trial
3. For the mast style jib crane, try the I‐shape colu column height is 4267mm, r=136mm, (Source: http://www.jherbertcorp.com/crane‐ jib.htm)
1) Cross‐sectional strength From Table of Factored Axial Compressive Resistance, Page 4‐37, Cr=Cro= 606 KN. From Table 4‐6, page 4‐18, ω
1.0 21.3,
From table 4‐7, page 4‐19,
1.0
CA 4350 MP (by interpolation), which is
Euler buckling load. Ce= 4350*15000mm2= 65250 KN,
1) Cross‐sectional strength
Design of behavior of jib crane
CIVL 510
(Source: http://www.jherbertcorp.com/crane‐ jib.htm)
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Design of behavior of jib crane
From Table of Factored Axial Compressive Resistance, Page 4‐37, Cr=Cro= 606 KN.
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tp = 0.43bβ
Φ
β
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From Table of Factored Axial Compressive Resistance, Page 4‐37, Cr=Cro= 606 KN. From Table 4‐6, page 4‐18, ω
1.0 31.4,
From table 4‐7, page 4‐19,
1.0
CA 2000 MP (by interpolation), which is a
Euler buckling load. Ce= 2000*15000mm2= 30000 KN,
. 0.005, from Table 4‐8, page 4‐20, U . 1.005, therefore, U = 1.005 . .. Accordingly, 0.03 0.59 0.62 1.0,
Zhen Sun, Abdul
Where: B = o.85 f = 0.850.6 = 0.0102 = 0 .75 0 .75 0.65 = 2d/b=2, b=d=D=406.4mm F 350 MP = 0.9 for steel f = specified 28 day strength of concrete (MP) = 20 MP tp = 0.43bβ
Φ
β
Φc
r
β
λ
λ
λ
Φ
‐ A=B*C= Area of plate (mm2) Determine the required area A= Cf /Br, total factored 5.3+ 139.3=144.6 KN. Determine B and C so that the n are equal.
1x
It is OK.
2
Consequently, A= 144.6KN/0.0102 =14177 mm You're Reading a Preview .
π
129651mm . 1.0 31.4, from Table 4‐4, page 4‐13,C ⁄A Unlock 291, forfullFaccess = Therefore, t = with a free trial. 0.43406.4 0.65 . 345MP , 0.43bβ . C =C = 291*15000=4365 KN (for uniaxial strong‐axis bending), U = 2) Overall member strength
2
y
p
a
r
rx
1.005
. .. 0.0320.59 0.622 1.0 ,
β
Try plate B=C=500 mm And m=n=500‐ 406.4+12.7=53.15 mm
Therefore, It is OK.
Φ
1x
Download With mm. Free Trial Therefore,
. 10.6 t 26.9 mm
So it is OK. Use PL 27*500*500 mm for the base plate.
3) Lateral‐ torsional buckling strength Cr=Cry=CrL=3575 KN, (by interpolation, table on HSC page 4‐37) L=4267 mm , Mrx=606 KN*m, U1x= 1.0
.L .4920mm . Accordingly, 0.0360.585 0.621 1.0 ,
5.5.2
For the mast style jib crane, the column is W310 for the column is1.15 * 4.267= 4.9 KN. Dead which equals to 4.9*1.2=5.9 KN
It is OK.
.C 5.913
5.5 Base plate design 5.5.1 For the free standing jib crane, the column is HS406*13, dead load for the column is 1.206*3.658=4.41KN. Dead load due to DLF, which equals to 4.41*1.2= 5.3KN
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From HSC 3‐13 (Table 3‐8), permitted Vf =14 KN and perm per bolt.
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Design of behavior of jib crane
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From HSC 3‐13 (Table 3‐8), permitted Vf =14 KN and perm per bolt. Therefore, number of bolts required = 18.05/14 . After using bolts connection spreadsheet to check design A325 bolts are required. And then it is OK.
2
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For W310*118, b=307mm, d=314mm.
A ... ⁄ 14235mm,which is less
Area of plate required
than he area bounded by the column dimensions b and d. Accordingly,
Anchor rods size is decided as 20mm for rod diameter diameter is 26mm. Four 20mm anchor rods will be used prescribed reinforced concrete foundation. The recomm foundations are based on a soil pressure of 2,500 lbs. Anchor rods check: When ASTM A325M‐ M20 uses for anchor rods The factored tensile resistance of an anchor rod shall π Φ = 0.67* *830=82.7 a Preview
0.43406.4 0.66 . ..You're Reading T AF
tp = 0.43bβ
Φ
β
27mm. = 0 .75 0 .75 . . 0.66 = 2d/b=2*314/307=2.05, b=307mm, d=314mm. F 350 MP. β
λ
λ
λ
V 0.60 AF 20 Anchor rods check in shear and tension: Download With Free Trial 1 . Vf =18.05/4=4.5 KN, Tf =139.3/4=34.8 KN. Therefore,
.. .. 0.0080.177 0.185
It is OK. Consequently, four A325M‐ M20 bolts can be rods.
5.6 Bolts connection design and anchor rods For the bolts connection on wall mounted jib crane, (Source: Vf is supported by side thrust, which equals to 18.05 KN. Tf is the total tension from the loads, which is 139.3 KN. Therefore, shear‐tension ratio is X= 18.05/139.3= 0.13. Try A325 bolts, bolts diameter d= 3/4 inch= 19.05 mm.
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Anchor rods in shear: Thea factored Unlock full access with free trial.shear resistance of an anchor rod shall be π =0.6*0.67* *398=50.2 KN Φ
Try plate B=C= 500mm, m= (500‐0.95*314)/2=101mm, n= (500‐0.8*307)/2= 127mm. Therefore, n/5=127/5=25.4mm< tp= 27mm. It is OK. In this case, use PL 27*500*500 mm for the base plate.
Design of behavior of jib crane
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5.7 Tie rods design Use 2 inch diameter tie rod to connect a fabricated beam two wall brackets. Show the pictures below:
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equations and input values. A printed copy of this sprea provided in Appendix A of this report.
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equations and input values. A printed copy of this sprea provided in Appendix A of this report.
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The input parameters are limited to a specific selection, grades and diameters. Data validation is used on numer ensure that the user has entered valid data.
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Design of behavior of jib crane
Zhen Sun, Abdul
The spreadsheets are built on a formatted sheet provide Stiemer and are available for download at www.sigi.ca/engineering/steel_design.html.
(Source: http://www.wallacecranes.com/jibwall.htm)
Span length A= 6096mm Bracket centers B= 2133mm Support beam bracket to beam end = 1066mm Support to pivot D=152.4mm
This spreadsheet allows the user to define variables and formulas in text format. The Format Sheet macro is used formulas and write the excel formula in an adjacent cell.
5.8 Wall bracket connection You're Reading a Preview Top and bottom wall brackets utilize a formed steel channel, with two For the descriptions in the Format Sheet we use Google bronze bushings, bronze thrust washers, and formed tie rod clevises. build a 3Dtrial. model and snap the perspective. Some of Unlock full access with a free Show the pictures below: look similar with the Format Sheet then we do not creat model.
Download With Free Trial
Four types of spreadsheet are used to check steel compo 1. Girder design check 2. Mast design check 3. Bolt connection check 4. Tension member check
(Source: http://www.jherbertcorp.com/crane‐ jib.htm)
6.0 Spreadsheet applications (check design components). Jib crane has mast, girder, and base plate three major parts, different types of jib crane may use different shape of steel parts. Free standing jib crane will use round shape mast, wall mounted jib crane will use I shape column. For this situation, we develop four different spreadsheets for each connection and stress check. CAN/CSA S16.1 Limit States Design of Steel Structures was used as the source for the
Design of behavior of jib crane
CIVL 510
8.0 Bibliography
7.0 Conclusion Jib crane design processes should be identified by each design. And then check the condition for each componen design will be done. Using the same principle, the differe jib cranes can be designed. Following the design process installation would be easy by Manufactory Company.
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CISC. Handbook of Steel Construction. Toronto, Ontario: Quadratone Graphics Ltd, 2007.
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Appendix A: Spreadsheet Application
CMAA. Crane Manufacturers Association of America. Guide for the design of crane‐supporting steel structures. Niagara Falls, Ontario: HATCH Ltd. http://www.jherbertcorp.com/crane‐ jib.htm http://www.dearborncrane.com/crane_buyers_guide/jib_cranes.htm
http://www.faqs.org/patents/app/20100072157
You're Reading a Preview
Unlock ‐Jib‐ full access with a free trial. http://hubpages.com/hub/Guide‐to‐Bridge‐Cranes‐and CranesThe‐Backbone ‐of ‐Logistics
Download With Free Trial
http://lims.mech.northwestern.edu/projects/jibcrane/ http://dcm‐reality.blogspot.com/2007/11/cranes.html
http://www.bestjibcranes.com/4‐popular‐types‐of ‐ jib‐cranes/ www.sigi.ca/engineering/steel_design.html
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Girder design check
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Mast design check I‐shape mast design check:
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Bolts connection design check:
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