How to calculate the boom angle on a load chart?
How to calculate the boom angle on a load chart?
First determine the boom angle by referring to the chart. Remember to add the distance from the front of the truck to the center of the boom turntable (approximately 10 ft). Therefore, when referring to the chart use a radius of 10 ft+16 ft=26 ft.
Which is the best way to read a load chart?
4. LIFT ANGLE – This chart illustrates the maximum lift if a luffing or fixed jib is used. Lifts with jib lengths of 32 and 49 feet (in addition to boom extension of 105 feet) are illustrated. With higher angles of lift, the maximum load capacity decreases. With a luffing jib, the angle can be automatically adjusted from the operators cab.
When to use lower load radius on load chart?
If the desired load radius falls between two load radii on the chart, it is recommended to use the load radius with the lower capacity and not to try to interpolate between the numbers. Always follow the manufacturer’s recommendations. Lifting capacity charts for excavators and backhoes are similar, but differ from crane load charts.
What do the arrows mean on a load chart?
In the other two columns, the arrows indicate the weight load for each axle depending on what additional accessories are loaded. 2. LIFT CAPACITY — This is where the magic happens. In the legend at the top of the chart, you can see these ratings apply when using 6.5 tons of counterweight, with the outriggers extended to 22 x 22.3 feet.
If the desired load radius falls between two load radii on the chart, it is recommended to use the load radius with the lower capacity and not to try to interpolate between the numbers. Always follow the manufacturer’s recommendations. Lifting capacity charts for excavators and backhoes are similar, but differ from crane load charts.
First determine the boom angle by referring to the chart. Remember to add the distance from the front of the truck to the center of the boom turntable (approximately 10 ft). Therefore, when referring to the chart use a radius of 10 ft+16 ft=26 ft.
What should be included in a load chart?
Don’t forget to include adjustments for buckets, boom extensions, load blocks, hoisting rope and other attachments that will alter the lifting capacity of the crane or equipment used to perform the lift.
In the other two columns, the arrows indicate the weight load for each axle depending on what additional accessories are loaded. 2. LIFT CAPACITY — This is where the magic happens. In the legend at the top of the chart, you can see these ratings apply when using 6.5 tons of counterweight, with the outriggers extended to 22 x 22.3 feet.
