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| Railhead | | Farthest point in the woods to which the railroad had ... |
| Ramp | | -See landing. ... |
| Rays | | A ribbon-like aggregate of wood cells extending radially across the ... |
| Reach | | Wood or metal structural member connecting a logging trailer to ... |
| Reaction wood | | Wood with distinctive anatomical and physical characteristics, formed typically in ... |
| Reforestation | | Restocking an area with forest trees ... |
| Regeneration | | Renewal of a tree crop, either by natural or artificial ... |
| Regression | | Statistical technique used to evaluate relationships among variables ... |
| Reload | | To transfer logs from one mode of transportation to another ... |
| Relog | | To salvage small timber, culls, and other residuals following the ... |
| Resaw | | A machine to cut boards, planks, slabs, or other material ... |
| Resawing | | The process of sawing lumber in two lengthwise, parallel to ... |
| Residual stand | | Trees remaining in an area after the cutting operation has ... |
| Residual value | | Actual or assumed value of a machine after it has ... |
| Residuals | | Trees remaining after an intermediate or partial cutting of tree ... |
| Residue | | Wood or bark that is left after a manufacturing process ... |
| Reverse casehardening | | A final stress-and-set condition in dry lumber in which ... |
| Rick | | Pile of evenly stacked cordwood, stave, bolts, or other short-length ... |
| Rift sawn | | Rift-sawing at a 30-degree or greater angle to the growth ... |
| Rig | | To install the blocks and lines used in a cable ... |
| Rigging | | Cables, blocks, and other equipment used in yarding logs ... |
| Right-hand mill | | A sawmill in which the saw and carriage are on ... |
| Right-of-way | | Strip of land on which a road is to be ... |
| Rim speed | | The speed of the saw blade at the extreme periphery ... |
| Ring debarker | | Used primarily to remove bark from saw logs and veneer ... |
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