. Bulletin of the Department of Agriculture. Agriculture; Agriculture. LOGGING IN THE DOUGLAS FIR REGION, 71. Butt chain. run from the main-line drum across the middle of the landing, some of the angles formed being a little larger than a right angle. This difficulty is generally overcome by leading the main line through a butt- chain block (fig. 22) hung to a stump standing in line with the yarder and landing and 50 feet or more from the approach end of the landing. In operation the log is yarded to the butt-chain block, the chokers are all unhooked from the butt chain, permitting the bu
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. LOGGING IN THE DOUGLAS FIR REGION, 71. Butt chain. run from the main-line drum across the middle of the landing, some of the angles formed being a little larger than a right angle. This difficulty is generally overcome by leading the main line through a butt- chain block (fig. 22) hung to a stump standing in line with the yarder and landing and 50 feet or more from the approach end of the landing. In operation the log is yarded to the butt-chain block, the chokers are all unhooked from the butt chain, permitting the butt chain to be passed through the block. Tlie chokers are again hooked to the butt chain and the log continues on its way to the landing. OPEEATION. After the ground around the landing has been freed of large chunks of waste mate- rial, the butt chain (fig. 23) attached to the main line is run out to the first log on the new road. The choker men put the chokers (figs. 24 and 25) around the end of the logs. After the load has been connected to the butt chain, the hook tender or head-rigging slinger signals for the engineer to haul in on the cable and the load starts down the road. When it reaches the butt-chain block, as it will in most cases, the chaser signals for the engine to stop, unhooks the chokers from the butt chain, pulls the butt chain through the butt-chain block, rehooks the chokers to the butt chain, and signals for the engineer to go ahead. The load is then dragged to the landing, where it is disconnected by the chaser. or in rare cases, by one of the loaders. Where the logs are large, only one is hauled at a trip. In other cases it may be practical to yard as many as six. In general, the number depends on the volume of the logs, the size of the equipment, and the ground Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not p
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