> great you name carpenters, because there were actually some problems in the > past classifying people working with wood. ... Can you explain the > difference between a framer, a carpenter, a cabinet maker, a joiner, a > finish carpenter, a timberman, a ring builder, a jerry man, a binder? >
There could only be a problem classifying trades if existing lexicons are ignored. At least in the U.S., currently, there are fairly exact definitions for trade classifications, down to the types of tools, specific materials, certification, and processes where required. Example: *"Grade 9 roofers must be fully skilled in installing new roofs. They must have the ability to apply the starter row of shingles to insure that they overlap properly and that they are securely fastened to the subsurface to eliminate possibility of leaks. On built-up roofs, they must be skilled in applying roofing felt, asphalt and gravel, or other topping material, and in sealing joints of roofing accessories with asphalt. In addition to work at the grade 7 level, the grade 9 roofers must be able to install and repair the metal roofing accessories themselves, such as gravel guards, flashings, gutters, valleys, vents, pipes, and chimneys.They also must have the ability to cut and form metal accessories to meet roofing requirements, to fasten them to roofs with nails or screws, to solder metal joints, and to cut and shape shingles to fit around the accessories. In comparison with the grade 7 level, the grade 9 roofers also must be familiar with a greater variety of roofing materials and their uses and methods of installation. They must know how to apply wood, asbestos, slate tile, and composition shingles; metal roofing panels; roofing felt and asphalt. When required, they must be able to apply asbestos siding materials.In addition to the hand tools used at the grade 7 level, they must be skilled in the use of shingle cutters, metal snips and saws. "* International Open BIM systems standards ( Building Information Management, which covers the entire life cycle from natural site, through construction and operation, to demolition and site restoration ) have even finer grain of detail. Some of them might be synonyms, some reflect regional differences (e.g. AE > vs. BE)? > Since the labor and materials supply chain is international, there are multi-lingual crosswalk tables between the U.S. and E.U., between the E.U. and the member countries. A casual observer might observe a job site during a pour, and classify the workers as 'concrete workers', when they are actually Formwork *Carpenters.* Folksonomies <https://en.wikipedia.org/wiki/Folksonomy> like OSM have benefits, but as they expand, the downsides begin to matter, and there usually isn't an effective mechanism to refactor them. Sometimes the apparent complexity of these existing standards appear intimidating, but they all have a root, branches, and leaves, and one can select the level(s) of abstraction which are coincident with common language. i.e. in one place you can see what the differences *and similarities* "... between a framer, a carpenter, a cabinet maker, a joiner, a finish carpenter, a timberman, a ring builder, a jerry man, a binder" are, and where your term lies in the hierarchy. Sometimes, the 'root' concept and groupings are not obvious. This also leaves room for reconciling it with other classifications - Japanese style carpentry roles are more or less orthogonal to Western style, more intensely aligned to product, the worker literally might select and fell the tree, mill that wood, and eventually carve it to shape in it's final position. It's a question, to a degree, of "re-inventing the wheel". There are already existing tagging schemes in the world ( some going back to the 1700's, from guilds and registries ). It might be worth a few minutes to seek those out, and adopt from those. Michael Patrick
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