Rouad Company has a tower crane “TEREX TS23” in “Assuit”. It is used to construct a homo silo with 88 meter height. This height needs anchorage system, which is not available in the present time. Therefore, the company has requested a design for a suitable anchorage system for this tower carne. Based on delivered data, site plan and crane catalog, the design of the anchorage system has been accomplished.
Tower crane’s anchorage system will be designed in accordance with the criteria outlined in this report. Similarly, the construction documents will incorporate those standards as appropriate to ensure that the criteria are applied through the design and construction phases.
2
CODES AND DESIGN STANDARDS
The design and Manufacturing of the shelter steel structure will be governed by the following codes and standards: ASTM
American Society for Testing and Materials
AISC
American Institute of Steel Construction
Tower Crane Anchorage System Homo Silo Project
6
SYSTEM LAYOUT
According to the catalog, two anchorage systems are needed. Their positions are shown in the figure. The two systems are identical. The system is based on three tie rods, which are ar ranged as shown in the figure. The details of the system are shown in the appendix.
Tower Crane Anchorage System Homo Silo Project
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Loading
The forces on the anchorage frame are calculated at maximum working conditions stated in the catalog. The objective is calculating the forces on the anchorage frame due to torsion during rotation and due to bending due to loading and unloading. The calculations are summarize d in the table.
Table 1 Summary of load calculations Catalog Catalog
power of rotation motors= rotation speed = Rotation torque = pin distance = pin force = pin force due to torsion =
30000 0.88 325544.2 2160 150714.9 150.715
watt rpm kNm mm N kN
Catalog Catalog Catalog Catalog
In tower is a t basement type F, out of service R1 = R2 = Reaction distance = Moment at base =
7.2 Check for buckling The all 8 loading conditions have been checked for maximum compression load in every tie rod. The cross section properties are shown in the figure. The buckling test result summary is shown in the table.
Table 3 Buckling test result summary Ti e Ro d A B C
Fo rc e 29.5 34.3 20.7
A 10436 10436 10436
I 68259570 68259570 68259570
L 5373 6624 5373
A I L n
n 1 1 1
E 210000 210000 210000
Area Moment of Inertia Legth Fixation type figure
Pc 160 160 160
mm^2 mm^4 mm 2/1/.7/.5
S.F. 1 1 1
LUMDA JE 66.43579 160.8771 81.90409 160.8771 66.43579 160.8771
F euler 0 0 0
F johnson Safty factor 152.8818 5.2 145.5547 4.2 152.8818 7.4
E Youngs Mod. N/mm^2 Pc Permissible stress N/mm^2 F euler Permissible Force Ton F johnson Permissible Force Ton
7.3 Bracket Anchor Bolts The all 8 loading conditions have been checked to calculate the maximum tension and shear forces on the anchor bolts of brackets J1 and J2. The summary of calculations is shown in table. The table
Tower Crane Anchorage System Homo Silo Project
Figure 4 Anchor bolt selection table
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Welding procedure o
All welds shall be continuous to obtain perfect sealing
o
All welds to be performed by qualified welders following the instruction of AWS Prequalified welding procedure
