Seven Bale, Two Cross Strap Load Restraint

LOAD RESTRAINT REPORT
Analysis of Proposed 7 Module Load Restraint Configuration
for Round Cotton Modules – TWO (2) CROSS STRAPS
The following is a load restraint report, which has been certified as being in
compliance with the 2004 National Load Restraint Guide.
However, it remains the responsibility of the user to ensure that the restrain load
complies with legal dimensional limits. It is likely that, if using cradles in excess of
450mm high, the total load height will exceed 4.3m.
In NSW operators may be able to successfully apply for an over height permit
allowing for a load height not exceeding 4.6m
All dimensional requirements must be compiled with.
ENGINEERING REPORT
RE14010 rev 4
Subject
Client
Client Address
Revision
Date
Report By
Analysis of Proposed 7 Module Load Restraint Configuration for
Round Cotton Modules – 2 Cross Straps
Cotton Australia Pty Ltd
115 Campbell St, Toowoomba, QLD 4350
4
23rd April 2014
Noel Straker
1 Scope and Introduction
Cotton Australia requested that Straker Engineering Services assess the suitability of a
proposed load restraint system for the transport of round cotton modules, and its ability
to comply with the requirements of the Load Restraint Guide 2nd Edition (2004).
The examined configuration is detailed below, along with a summary of the analysis
performed.
2 Exclusions
This analysis is an assessment of the load restraint capacity, and does not include any
assessment of trailer or load dimensions or vehicle stability for the purposes of highway
regulation compliance.
3 Reference Material
•
•
Load Restraint Guide, 2nd Edition (2004), National Transport Commission and
Roads and Traffic Authority NSW.
Engineering Report RE11049 - Analysis of Proposed Load Restraint Configurations
for Round Cotton Modules, Straker Engineering Service Pty Ltd
Straker Engineering Services Pty Ltd
ABN: 72 134 876 056
93 Seventeen Mile Rocks Rd, OXLEY, QLD 4075
Tel.: +61 (0)7 3278 5881
Email: [email protected]
Page 1 of 6
ENGINEERING REPORT
RE14010 rev 4
4 Proposed Restraint Configurations
4.1
Flat Bed Trailer
C
DC
C
2
A
4
1
6
3
5
3
G
F
77
5
G (2 off)
B
B
H
G
E
A
B
C
D
E
F
G
H
Load
Maximum module weight
Module nominal dimensions
Trailer Surface
Tensioning Sequence
75mm or 100mm webbing strap winch (may be located at front or rear)
minimum lashing capacity: 4000kg
minimum pretension capacity: 1150kgf
50mm webbing strap winch, run across top of 100mm strap to opposite tie rail.
minimum lashing capacity: 2000kg
minimum pretension capacity: 600kgf
30° minimum
15° minimum
13700mm maximum (maximum 12300mm from kingpin to rear of trailer)
Reinforced headboard with minimum forward restraining capacity of 6000kgf
Module Support Frame in accordance with dwg# JB13262-000 or JB14065-100, bolted to trailer deck with
4 off M16 gr 8.8 boltsets including 50mm square structural washers. (please note, additional restraint such
as tie-down straps can be used in conjunction with the specified bolted fastening if desired)
4600 maximum
7 off Plastic wrapped cotton modules
2500kg
2438 mm wide x 2286 mm diameter
Smooth Steel or Floor plate (2.5mm minimum thickness)
1. Tension longitudinal strap using winch “A” to 1150 kgf (minimum)
2. Tension lateral straps using winches “B” until angles “C” are obtained in 100mm webbing strap.
Straker Engineering Services Pty Ltd
ABN: 72 134 876 056
93 Seventeen Mile Rocks Rd, OXLEY, QLD 4075
Tel.: +61 (0)7 3278 5881
Email: [email protected]
Page 2 of 6
ENGINEERING REPORT
RE14010 rev 4
5 Design Data
5.1
A
Design Data
Data
Friction Co-efficient – Module on Smooth Steel
Value
0.4
Source
Engineering Report RE11049 – Straker Engineering
Services
6 Calculations
6.1 Forward Direction Restraint
Forward direction restraint is provided by frictional contact with the trailer floor and load
blocking contact with the headboard and module support frames. A summary of the
calculation is provided below:
Modules 1 to 4
A
maximum module mass
2500kg
B
number of modules
4
C
total mass
10000kg
=AxB
D
forward restraint required
8000kgf
= 0.8 x C ( Load Restraint Guide 2 edition 2004)
E
friction due to self weight (modules
1,3 only)
2000kgf
= friction co-efficient x A x 2
F
headboard capacity
6612kgf
calculated for 2 off 75x75x3.0 SHS Gr350 reinforcing uprights
H
total forward restraint
8612kgf
= E + F (exceeds D therefore acceptable)
nd
Modules 5 to 7
A
maximum module mass
2500kg
B
number of modules
3
C
total mass
7500kg
=AxB
D
forward restraint required
6000kgf
= 0.8 x C ( Load Restraint Guide 2 edition 2004)
2000kgf
= friction co-efficient x A x 2
4630 kgf
Horizontal force require to roll module over frame as per dwg JB13262-000
6630kgf
= E + F (exceeds D therefore acceptable)
E
F
G
friction due to self weight (modules
5,7 only)
restraint from blocking at module 4
support frame
total forward restraint
nd
The proposed restraint system has been calculated to provide a forward direction
restraint force exceeding the performance standard set out in the Load Restraint Guide
2nd Edition (2004).
NOTE: The following sources of additional restraint were conservatively omitted from the calculation
above:
• Friction due to lashing downforce.
• Friction due to self-weight of modules 2, 4 and 6
Straker Engineering Services Pty Ltd
ABN: 72 134 876 056
93 Seventeen Mile Rocks Rd, OXLEY, QLD 4075
Tel.: +61 (0)7 3278 5881
Email: [email protected]
Page 3 of 6
ENGINEERING REPORT
RE14010 rev 4
6.2 Rearward direction restraint
Rearward direction restraint is provided by frictional contact with the trailer floor, load
blocking contact with the module support frames, and the 100mm webbing strap. A
summary of the calculation is provided below
Modules 1 to 3
A
maximum module mass
B
number of modules
3
C
total mass
7500kg
=AxB
D
rearward restraint required
3750kgf
= 0.5 x C ( Load Restraint Guide 2 edition 2004)
2000kgf
= friction co-efficient x A x 2
4630 kgf
Horizontal force require to roll module over frame as per dwg JB13262-000
6630kgf
= E + F (exceeds D therefore acceptable)
E
F
H
friction due to self-weight (modules
1,3 only)
restraint from blocking at module 4
support frame
total rearward restraint
2500kg
nd
Modules 4 to 7
A
maximum module mass
2500kg
B
number of modules
4
C
total mass
10000kg
=AxB
D
rearward restraint required
5000kgf
= 0.5 x C ( Load Restraint Guide 2 edition 2004)
E
friction due to self-weight (modules
5,7 only)
2000kgf
= friction co-efficient x A x 2
F
webbing strap capacity
4000kgf
Lashing capacity for webbing strap
G
total rearward restraint
6000kgf
= E + F (exceeds D therefore acceptable)
nd
The proposed restraint system has been calculated to provide a rearward direction
restraint force exceeding the performance standard set out in the Load Restraint Guide
2nd Edition (2004).
NOTE: The following sources of additional restraint were conservatively omitted from the calculation
above:
• Friction due to lashing downforce
• Friction due to self-weight of modules 2,4 and 6
Straker Engineering Services Pty Ltd
ABN: 72 134 876 056
93 Seventeen Mile Rocks Rd, OXLEY, QLD 4075
Tel.: +61 (0)7 3278 5881
Email: [email protected]
Page 4 of 6
ENGINEERING REPORT
RE14010 rev 4
6.3 Lateral direction restraint
Lateral direction restraint is provided by frictional contact with the trailer floor and load
blocking contact with the module support frames. A summary of the calculation is
provided below:
Lateral Restraint
A
maximum module mass
B
number of modules
7
C
total mass
17500kg
=AxB
D
lateral restraint required
8750kgf
= 0.5 x C ( Load Restrain Guide 2 edition 2004)
4000kgf
= friction co-efficient x A x 4
5980kgf
Calculated restraint capacity for frame as per dwg JB13262-000
9980kgf
= E + F (exceeds D therefore acceptable)
E
F
H
friction due to self-weight (modules
1,3,5,7 only)
restraint from blocking at module
support frames
total lateral restraint
2500kg
nd
The proposed restraint system has been calculated to provide a lateral restraint force
exceeding the performance standard set out in the Load Restraint Guide 2nd Edition
2004.
NOTE:
1) The following factors were conservatively omitted for the purposes of this calculation:
• increases in the tension of the longitudinal strap caused by the tensioning of the mid-straps, and
• mechanical interaction present between the strap and end modules where the strap buries into
the module.
• Friction at headboard
• Friction due to lashing forces
• Friction due to self-weight of modules 2,4 and 6
2) Work performed previously by Straker Engineering Services Pty Ltd (ref Engineering Report
RE11049) demonstrates the ability of inter-module friction to prevent relative movement of the
load to loads exceeding the 0.5g requirement.
Straker Engineering Services Pty Ltd
ABN: 72 134 876 056
93 Seventeen Mile Rocks Rd, OXLEY, QLD 4075
Tel.: +61 (0)7 3278 5881
Email: [email protected]
Page 5 of 6
ENGINEERING REPORT
RE14010 rev 4
6.4 Vertical direction restraint
Vertical restraint is provided to the cotton modules by the combination of the actions of
the longitudinal 100mm webbing strap, the lateral 50mm webbing straps and bearing
forces between the upper and lower modules.
A
maximum module mass
2500kg
B
number of modules
7
C
total mass
17500kg
=AxB
D
vertical restraint required
3500kgf
= 0.2 x C ( Load Restrain Guide 2 edition 2004)
E
F
G
100mm strap minimum
pretension
angle effect – module 2
leading edge
angle effect – module 2 trailing
edge
1150kgf
0.25
0.5
H
downforce – module 2
863kgf
I
angle effect – module 4
0.5
J
downforce – module 4
1150kg
K
L
angle effect – module 6
leading edge
angle effect – module 6 trailing
edge
nd
= ExF + ExG
=ExIx2
0.5
0.25
M
downforce – module 6
863kgf
N
angle effect – module 7
1
= ExK + ExL
O
downforce – module 7
1150kgf
=ExN
N
total vertical restraint
4026kgf
= H + J + M + O (Exceeds D therefore acceptable)
The proposed restraint system has been calculated to provide a vertical restraint force
exceeding the performance standard set out in the Load Restraint Guide 2nd Edition
2004.
7 Conclusion
The load restraint configurations detailed in section 4 have been calculated to comply
with the performance standards set out in the Load Restraint Guide – 2nd Edition – 2004.
Approved by
Noel Straker
Principal Engineer
Name
Position
Straker Engineering Services Pty Ltd
ABN: 72 134 876 056
93 Seventeen Mile Rocks Rd, OXLEY, QLD 4075
Tel.: +61 (0)7 3278 5881
Email: [email protected]
23rd April 2014
Signature
Date
Page 6 of 6
1
B
C
Copyright. Information Disclosed in this document is Confidential and proprietary and shall not be reproduced, copied or distributed wihout express permission.
A
2
3
4
5
DO NOT SCALE
IF IN DOUBT - ASK
Lip SHS sections may be substituted with pipe - refer note 5
A
9
1
4
600
7
2
6
2
5
4
B
3
3
2
2400 max
150
150
8
Notes
100
400
200
100
25
450-600
1. Material: AS1163 gr 350 UNO
2. Surface Finish: Clean and free from burs
3. All welding to be in accordance with AS1554.1 (GP)
4. All connections to be continuously welded with a design
throat thickness not less than the minimum joint parent
thickness.
5. Items 5,6 and 7 may be substituted with a part formed from
AS1163 gr 250 60.3x4.5 CHS if required.
12.5
C
425
425
ITEM DWG NUMBER
1
2
3
4
5
6
7
8
JB13262-101
9
JB13262-102
25
2300
PART NUMBER: JB13262-000
Job No.
Scale
D
1
4/4/14
Height variation permitted - pipe end sect option added
0
21/02/14
IFC
Date
Description of revision
Revisions
1
2
NS
NS
NS
Tolerances U.N.O.
X
0-50
X
50-200
X
200+
X.X
X.XX
X.XXX
All Angles
NS
NS
NS
By
Ckd
Eng
`1
`2
`3
`0.5
`0.1
`0.05
`0.5~
21/02/14
21/02/14
Eng Mngr
NS
NS
21/02/14
21/02/14
Client
Cotton Australia
3
Checked
Drawing Practice to AS 1100
All Dimensions in millimeters U.N.O.
Third Angle Projection U.N.O.
JB13262
Date
NTS
Noel
NS
Drawn
Rev
6
Engineer
4
DESCRIPTION
100x50x2.5 SHS 2300 long
50x50x3 SHS 500 long
50x50x3.0 SHS 2300 long
50x50x3 SHS 450 long
50x50x3 SHS 100 long shaped
50x50x3 SHS 140 long shaped
50x50x3 SHS 500 long shaped
50x6 FMS Bolt Plate
50x6 FMS bracing
QTY
2
4
2
4
4
4
2
2
4
Vertical - Lateral Support Frame A3
Drawing Number
Sheet 1 of 3
1
JB13262-000
5
Rev.
6
D
1
B
C
Copyright. Information Disclosed in this document is Confidential and proprietary and shall not be reproduced, copied or distributed wihout express permission.
A
2
3
4
5
6
DO NOT SCALE
IF IN DOUBT - ASK
150x50x2.5 RHS
A
150x50x2.5 RHS
n18 thru 2 places
40x6 gr250 (min) FMS
600
425
B
150x50x2.5 RHS
400
150x50x2.5 RHS
50
C
Notes
1. Material: AS1163 gr 350 UNO
2. Surface Finish: Clean and free from burs
3. All welding to be in accordance with AS1554.1 (GP)
4. All connections to be continuously welded with a design
throat thickness not less than the minimum joint parent
thickness.
PART NUMBER: JB14065-001
Job No.
Scale
D
Noel
NS
21/02/14
4/4/14
Eng Mngr
NS
NS
4/4/14
4/4/14
Client
Cotton Austtralia
Drawn
Checked
Tolerances U.N.O.
0
4/4/14
Rev
Date
IFC
Description of revision
Revisions
1
2
NS
NS
NS
By
Ckd
Eng
X
0-50
X
50-200
X
200+
X.X
X.XX
X.XXX
All Angles
`1
`2
`3
`0.5
`0.1
`0.05
`0.5~
3
Drawing Practice to AS 1100
All Dimensions in millimeters U.N.O.
Third Angle Projection U.N.O.
JB14065
Date
NTS
Engineer
4
A3
Bolt Through Plinth
D
Drawing Number
Sheet 2 of 3
0
JB14065-001
5
Rev.
6
1
B
C
Copyright. Information Disclosed in this document is Confidential and proprietary and shall not be reproduced, copied or distributed wihout express permission.
A
2
3
4
5
6
DO NOT SCALE
IF IN DOUBT - ASK
Restraint frame in accordance
with JB13262-000 with maximum
rail height of 600mm.
A
Trailer Deck
B
2 off bolt through plinths
in accordance with JB14065-001
C
4 off M16x200 gr 8.8 boltsets
c.w. 50x50x3 Structural washers
PART NUMBER: JB14065-100
Job No.
D
21/02/14
4/4/14
Bolt Through Plinth Installed
Arrangement
Eng Mngr
NS
NS
4/4/14
4/4/14
Drawing Number
Client
Cotton Australia
Drawn
Checked
Tolerances U.N.O.
0
4/4/14
Rev
Date
IFC
Description of revision
Revisions
1
2
NS
NS
NS
By
Ckd
Eng
X
0-50
X
50-200
X
200+
X.X
X.XX
X.XXX
All Angles
`1
`2
`3
`0.5
`0.1
`0.05
`0.5~
3
Drawing Practice to AS 1100
All Dimensions in millimeters U.N.O.
Third Angle Projection U.N.O.
JB14065-100
Date
NTS
Noel
NS
Scale
Engineer
4
A3
D
Sheet 3 of 3
0
JB14065-100
5
Rev.
6

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