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Language: English
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Fiber Supply Series (Details)Includes 5 courses for $299/year. Pulping Library (Details)Includes 72 courses for $1,499/year.
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Training Time: 17 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English
Many pulp mills receive wood in the form of whole logs. Logs can arrive at a mill by water, barge, rail and most commonly in North America, by truck. Incoming railcars and trucks are scaled to determine their weight and/or volume of logs. Trucks are then normally unloaded by mobile loaders or by overhead cranes. The cranes used for log unloading can have a linear or circular format. Overhead cranes for unloading are initially more capital intensive, but have a number of ongoing benefits. This course covers the benefits as well as some operational and safety considerations related to the use of woodyard cranes.
Crane and Hoist Rigging Safety
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Crane Hand Signals
Wire Rope Basics
Log Handling and Chip Storage
Paper Fiber Sources
The following key questions are answered in this module:
What different types of cranes are used in woodyards? There are several styles of fixed cranes used in woodyards. One type is a tower crane, in which a girder rotates around a single central tower. A circular gantry crane also rotates around a central point, but has a second support which rolls along a circular rail. A linear gantry crane rolls on two parallel rails.
What are some of the advantages of woodyard cranes versus mobile unloaders? Cranes reduce the footprint of a woodyard, allow for more flexible management of the log inventory, have reduced operating costs and increased productivity.
What non-crane alternatives exist for unloading log trucks? Log trucks can be unloaded by dedicated mobile unloaders. Some are capable of handling an entire trailer load in one grab.
How can weather affect crane operation? Weather has a great effect on large woodyard cranes. Moderate winds affect the controllability of logs loads and high winds can lead to a crane shut down for safety reasons. Fog, rain and snow can reduce visibility, slowing or stopping operations entirely.
What are some log stacking considerations? Logs need to be stacked on a flat firm surface. If the logs are tapered, they should be stacked to maintain a relatively flat and horizontal stack top. Short logs should not be placed below longer logs as this can lead to instability.
Below is a transcript of the video sample provided for this module:
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