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In this case, as the lift angle increases so does the force on the lug. They can also be used to calculate the same unknowns where the lugs are used to upend a vessel or piece of equipment from the horizontal through 90 degrees to upright. The following two programs can be used to design or check the design of the end area of a lug, the bearing stress, the combined stress of the lug plate and weld for a force at a constant angle. Lifting A Vessel using Double Basket Hitches and two Longitudinal Spreader Bars Lifting A Vessel without Saddles using Double Basket Hitches Lifting A Vessel with Saddles using Double Basket Hitches The three basket hitch programs have been developed to determine sling lengths and other information required to make a rigging hookup using one or two basket hitches. These forces can then be used to determine crane selection, design lifting attachments, design the rigging and tailing hookups, etc. The Upending program calculates the forces that occur when a vessel is rotated from the horizontal to the vertical. Program to Evaluate Forces while Upending a Vessel: Off Center Reach-Conventional & Hydraulic Cranes The program will then calculate the boom length required to reach the pick point, with and without a jib.
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Of the four programs that do crane studies, I find this one to be the most useful.Įnter the crane data, the jib length, the distance from the center of rotation to the structure, the structure height, the distance across the structure, and the structure width to the pick point. OFF CENTER REACH-CONVENTIONAL & HYDRAULIC CRANES: The program will then calculate the reach across the structure, for both the boom and the jib. The program will then calculate the location of the center of rotation of the crane and the maximum reach across the structure, for both the boom and the jib.Įnter the crane data, the boom length, the jib length, the distance from the center of rotation to the structure and the structure height. The program user must verify the accuracy of all output values before using them in any rigging operation.Ĭrane operators, estimators, riggers and rigging engineers can use these four programs to do quick and accurate crane studies.Įnter the crane data, the boom length, the jib length, and the structure height.
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Maximum Reach accepts no responsibility for any damages that may result from the use of any values that are derived from these programs. Maximum Reach Enterprises provides this information in good faith, without charge. Please send us an email if you notice an error in a program or if a program is not executing properly, ie not printing correctly, etc. Our goal is to provide rigging programs that calculate accurate answers. When you have a run you want to keep for reference, a printable version of the input and output, without color, is available by clicking on the Printable button. After entering any input data, be sure and click on the CALCULATE button. For each run, the input information should be reviewed carefully to make sure that the intended values have been entered. You can progress from one input field to the next by clicking on the Tab button or by using your mouse.
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You can then enter your own input data over the sample values in the input fields. International rigging, lift supervision, rigging quizzes, rigging training, rigging book sales,Įach program provides sample values to show how the program works. Design of rigging software, rigging engineering, erection, guy derrick analysis,