PDFWAC 296-17A-0508
Classification 0508.
0508-00 Radio, television, cellular or water towers, poles and towers, N.O.C.: Construction or erection, dismantling, maintenance, or repair
Applies to:
• Contractors constructing, erecting, dismantling, maintaining, or repairing iron, steel, or wood radio, television, cellular, or water towers, poles, and those towers which are not covered by another classification (N.O.C.).
• Specialty contractors who install, remove, service, or repair antennas, dish units, and/or other transmitting/receiving apparatus to a structure covered by this classification.
Work activities include, but are not limited to:
• Clearing of land (if done by the excavation contractor);
• Excavating for the foundation;
• Placing forms;
• Installing reinforcing steel;
• Pouring and finishing the foundation;
• Fabricating and assembling parts when performed on-site;
• Erecting framework;
• Installing scaffolding;
• Raising sections by crane and welding, bolting, or otherwise fastening them into place;
• Installing, removing, servicing, or repairing of antennas, dish units, or other transmitting and receiving apparatus to the structure;
• Delivering material and supplies to the job site when done by employees of an employer having operations subject to this classification.
Special note: This classification does not allow the separate reporting of excavation or foundation work regardless of who performs the work.
Exclusions:
• Felling of timber is classified in the applicable logging classification.
• Preliminary clearing of land by a contractor who is not also excavating for the foundation is classified in 0101.
• Delivery of material to the site by employees of a material supplier or a common carrier is classified in the applicable classification.
• Construction of a control building or installation of a modular control building is classified in the applicable construction classification.
0508-01 Smokestack: Construction or erection, dismantling, maintenance, or repair
Applies to:
Contractors constructing, erecting, dismantling, maintaining, or repairing iron, steel, or concrete smokestacks. These structures are part of an industrial complex and facilitate the discharge of combustion vapors, gases, or smoke.
Work activities include, but are not limited to:
• Clearing of land (if done by the excavation contractor);
• Excavating for the foundation;
• Placing forms;
• Installing reinforcing steel;
• Pouring and finishing the foundation;
• Fabricating and assembling parts when performed on-site;
• Erecting framework;
• Installing scaffolding;
• Raising sections by crane and welding, bolting, or otherwise fastening them into place;
• Delivering material and supplies to the job site and installing any apparatus onto a structure covered by this classification when done by employees of an employer having operations subject to this classification.
Special note: This classification does not allow the separate reporting of excavation or foundation work regardless of who performs the work.
Exclusions:
• Installation of machinery is classified in 0603.
• Felling of timber is classified in the applicable logging classification.
• Preliminary clearing of land by a contractor who is not also excavating for the foundation is classified in 0101.
• Delivery of material to the site by employees of a material supplier or a common carrier is classified in the applicable classification.
• Construction of a control building or installation of a modular control building is classified in the applicable construction classification.
0508-02 Windmill and silo: Construction or erection, dismantling, maintenance, or repair
Applies to:
Contractors constructing, erecting, dismantling, maintaining, or repairing iron, steel, concrete, or wood windmills or silos.
Windmills use the force of wind passing around the rotor blades to turn turbines and produce electric power. These may be built individually or in groups known as "wind farms." Additional apparatus and storage batteries are housed in separate buildings nearby.
Silos are large cylindrical structures used to store grain or fodder (silage). They are filled through the top by means of a conveyor. Within the structure, augers and pumps can move the grain to blend, aerate, or feed it out the chute.
Work activities include, but are not limited to:
• Clearing of land (if done by the excavation contractor);
• Excavating for the foundation;
• Placing forms;
• Installing reinforcing steel;
• Pouring and finishing the foundation;
• Fabricating and assembling parts when performed on-site;
• Erecting the framework;
• Installing scaffolding;
• Raising sections by crane and welding, bolting, or otherwise fastening them into place;
• Delivering material and supplies to the job site and installation of any apparatus onto a structure covered by this classification when done by employees of an employer having operations subject to this classification.
Special note: This classification does not allow the separate reporting of excavation or foundation work regardless of who performs the work.
Exclusions:
• Installation of machinery is classified in 0603.
• Felling of timber is classified in the applicable logging classification.
• Preliminary clearing of land by a contractor who is not also excavating for the foundation is classified in 0101.
• Delivery of material to the site by employees of a material supplier or a common carrier is classified in the applicable classification.
• Construction of a control building or installation of a modular control building is classified in the applicable construction classification.
0508-03 Oil still or refinery: Construction or erection, dismantling, maintenance, or repair
Applies to:
Contractors constructing, erecting, dismantling, maintaining, or repairing oil stills or refineries. These facilities are composed of multi-story storage tanks, chimneys, pipelines, separating apparatus, and steam generating systems. They receive unprocessed petroleum (crude oil) and convert it into usable products such as gasoline, kerosene, wax, grease, and chemical feedstocks.
Work activities include, but are not limited to:
• Clearing of land (if done by the excavation contractor);
• Excavating for the foundation;
• Placing forms;
• Installing reinforcing steel;
• Pouring and finishing the foundation and other concrete;
• Fabricating and assembling parts when performed on-site;
• Erecting framework;
• Installing scaffolding;
• Raising sections by crane and welding, bolting, or otherwise fastening them into place;
• Delivering material and supplies to the job site and the installation of apparatus in an oil still or refinery when done by employees of an employer having operations subject to this classification.
Special note: This classification does not allow the separate reporting of excavation or foundation work regardless of who performs the work.
Exclusions:
• Installation of machinery or apparatus by a specialty contractor is classified in 0603.
• Plant maintenance contract work as described in classification 0603 is classified in 0603.
• Felling of timber is classified in the applicable logging classification.
• Preliminary clearing of land by a contractor who is not also excavating for the foundation is classified in 0101.
• Delivery of material to the site by employees of a material supplier or a common carrier is classified in the applicable classification.
• Construction of a control or pump houses and other buildings not part of the main processing plant is classified in the applicable construction classification.
0508-04 Blast furnace and metal burners: Construction or erection, dismantling, maintenance, or repair
Applies to:
Contractors constructing, erecting, dismantling, maintaining, or repairing blast furnaces and metal burners. These are tall, very heavy gauge, cylindrical steel structures in which heated air and combustible fuels are combined to produce the heat necessary to separate the usable material in metal ores from the waste products.
Work activities include, but are not limited to:
• Clearing of land (if done by the excavation contractor);
• Excavating for the foundation;
• Placing forms;
• Installing reinforcing steel;
• Pouring and finishing the foundation;
• Fabricating and assembling parts when performed on-site;
• Erecting framework;
• Installing scaffolding;
• Installing a brick lining;
• Raising sections by crane and welding, bolting, or otherwise fastening them into place;
• Delivering material and supplies to the job site and the installation of apparatus onto a structure covered by this classification when done by employees of an employer having operations subject to this classification.
Special note: This classification does not allow the separate reporting of excavation or foundation work regardless of who performs the work.
Exclusions:
• Installation of machinery is classified in 0603.
• Felling of timber is classified in the applicable logging classification.
• Preliminary clearing of land by a contractor who is not also excavating for the foundation is classified in 0101.
• Delivery of material to the site by employees of a material supplier or a common carrier is classified in the applicable classification.
• Construction of additional buildings as part of an ore reduction or metal producing facility is classified in the applicable construction classification.
0508-08 Elevated railway, tram, lift, or similar conveyances: Construction or erection, dismantling, maintenance, or repair
Applies to:
Contractors constructing, erecting, dismantling, maintaining, or repairing elevated railways, trams, lifts, or similar conveyances. An elevated railway can be a full-scale railroad or a smaller scale system such as a recreational monorail. For the purposes of this classification, trams are overhead cable cars, and lifts are similar to the typical ski lift.
Work activities include, but are not limited to:
• Clearing of land (if done by the excavation contractor);
• Excavating for the foundation;
• Placing forms;
• Installing reinforcing steel;
• Pouring and finishing the foundation;
• Fabricating and assembling parts when performed on-site;
• Erecting framework and supports (metal or concrete);
• Installing scaffolding;
• Raising sections by crane and welding, bolting, or otherwise fastening them into place;
• Installing and securing tracks, cables, or pulley systems;
• Delivering material and supplies to the job site and the installation of apparatus onto a structure covered by this classification when done by employees of an employer having operations subject to this classification.
Special note: This classification does not allow the separate reporting of excavation or foundation work regardless of who performs the work.
Exclusions:
• Installation of machinery is classified in 0603.
• Felling of timber is classified in the applicable logging classification.
• Preliminary clearing of land by a contractor who is not also excavating for the foundation is classified in 0101.
• Delivery of material to the site by employees of a material supplier or a common carrier is classified in the applicable classification.
• Construction of a control building or installation of a modular control building is classified in the applicable construction classification.
0508-09 Exterior tanks, N.O.C.: Construction or erection, dismantling, maintenance, or repair
Applies to:
Contractors constructing, erecting, dismantling, maintaining, or repairing all types of exterior tanks not covered by another classification (N.O.C.). These tanks may be part of water storage and distribution systems, chemical, or petroleum processing and storage operations, or other industrial applications. This classification includes the erection or construction of tanks that are elevated on structural piers and those that rest on the ground. These tanks may be constructed singly or in groups known as "tank farms" which are common to the petroleum industry.
Work activities include, but are not limited to:
• Clearing of land (if done by the excavation contractor);
• Excavating for the foundation;
• Placing forms;
• Installing reinforcing steel;
• Pouring and finishing the foundation;
• Fabricating and assembling parts when performed on-site;
• Erecting framework;
• Installing scaffolding;
• Raising sections by crane and welding, bolting, or otherwise fastening them into place;
• Delivering material and supplies to the job site and installation of apparatus onto a structure covered by this classification when done by employees of an employer having operations subject to this classification.
Special note: This classification does not allow the separate reporting of excavation or foundation work regardless of who performs the work.
Exclusions:
• Installation of machinery is classified in 0603.
• Felling of timber is classified in the applicable logging classification.
• Preliminary clearing of land by a contractor who is not also excavating for the foundation is classified in 0101.
• Delivery of material to the site by employees of a material supplier or a common carrier is classified in the applicable classification.
• Construction of a control building or installation of a modular control building is classified in the applicable construction classification.
0508-11 Crane or derrick: Installation, construction, or erection, dismantling, maintenance, or repair
Applies to:
Contractors installing, constructing, erecting, dismantling, maintaining, or repairing nonmobile cranes and derricks for commerce and industrial use. Cranes in this classification are permanently installed at a marine port, cargo handling facility, or an industrial facility to move (vertically or horizontally) supplies, cargo containers, or heavy objects that are being assembled and must pass through the length of a building to complete the process. The additional reinforcing required to support the crane is usually contemplated in the plan for the building's foundation where the crane is being anchored.
Cranes and derricks can be very similar in that they are both defined as machines for hoisting and moving heavy objects through the use of stationary or movable booms equipped with cables. An object, sometimes weighing many tons, can be secured to the cables and moved into position along the length of a stationary boom or to another location within the reach of a movable boom. A derrick, however, can also be a permanent framework over an opening, such as an oil-drilling operation, to support boring equipment.
Work activities include, but are not limited to:
• Placing forms;
• Installing reinforcing steel;
• Fabricating and assembling parts when performed on-site;
• Erecting framework;
• Installing scaffolding;
• Raising sections by crane and welding, bolting, or otherwise fastening them into place;
• Delivering material and supplies to the job site and the installation of apparatus onto a structure covered by this classification when done by employees of an employer having operations subject to this classification.
Special note: This classification does not allow the separate reporting of excavation or foundation work regardless of who performs the work.
Exclusions:
• Operating mobile cranes is classified in 3506.
• Installation of machinery is classified in 0603.
• Preliminary clearing of land by a contractor who is not also excavating for the foundation is classified in 0101.
• Delivery of material to the site by employees of a material supplier or a common carrier is classified in the applicable classification.
0508-12 Water cooling towers or structures - Metal or wood: Construction or erection, dismantling, maintenance, or repair
Applies to:
Contractors constructing, erecting, dismantling, maintaining, or repairing metal or wood water cooling towers or vertical structures. These structures are usually part of an industrial complex in which water is used as a cooling element in a manufacturing process. The water, which absorbs heat from the machinery being cooled, can be circulated and reused after it has been channeled through a cooling tower to be chilled sufficiently. A common design allows the hot water to tumble down numerous open louvers or steps to lower its temperature.
Work activities include, but are not limited to:
• Clearing of land (if done by the excavation contractor);
• Excavating for the foundation;
• Placing forms;
• Installing reinforcing steel;
• Pouring and finishing the foundation;
• Fabricating and assembling parts when performed on-site;
• Erecting framework;
• Installing scaffolding;
• Raising sections by crane and welding, bolting, or otherwise fastening them into place;
• Delivering material and supplies to the job site and the installation of apparatus onto a structure covered by this classification when done by employees of an employer having operations subject to this classification.
Special note: This classification does not allow the separate reporting of excavation or foundation work regardless of who performs the work.
Exclusions:
• Construction of a water-cooling structure that uses a horizontal rather than tower-like design is classified in 0518.
• Installation of machinery is classified in 0603.
• Felling of timber is classified in the applicable logging classification.
• Preliminary clearing of land by a contractor who is not also excavating for the foundation is classified in 0101.
• Delivery of material to the site by employees of a material supplier or a common carrier is classified in the applicable classification.
• Construction of other related buildings at the project site is classified in the applicable construction classification.
[Statutory Authority: RCW 51.04.020 and 51.16.035. WSR 25-23-070, s 296-17A-0508, filed 11/18/25, effective 1/1/26. Statutory Authority: RCW 51.16.035, 51.16.100, and 2007 c 324. WSR 07-24-045, § 296-17A-0508, filed 12/1/07, effective 1/1/08. WSR 07-01-014, recodified as § 296-17A-0508, filed 12/8/06, effective 12/8/06. Statutory Authority: RCW 51.16.035, 51.16.100. WSR 06-12-075, § 296-17-521, filed 6/6/06, effective 7/7/06. Statutory Authority: RCW 51.04.020, 51.16.035, and 51.12.120. WSR 03-23-025, § 296-17-521, filed 11/12/03, effective 1/1/04. Statutory Authority: RCW 51.16.035, 51.04.020. WSR 00-14-052, § 296-17-521, filed 7/1/00, effective 7/1/00. Statutory Authority: RCW 51.16.035. WSR 98-18-042, § 296-17-521, filed 8/28/98, effective 10/1/98. Statutory Authority: RCW 51.04.020(1) and 51.16.035. WSR 93-12-093, § 296-17-521, filed 5/31/93, effective 7/1/93; WSR 89-24-051 (Order 89-22), § 296-17-521, filed 12/1/89, effective 1/1/90. Statutory Authority: RCW 51.16.035. WSR 85-24-032 (Order 85-33), § 296-17-521, filed 11/27/85, effective 1/1/86; WSR 85-06-026 (Order 85-7), § 296-17-521, filed 2/28/85, effective 4/1/85; WSR 83-24-017 (Order 83-36), § 296-17-521, filed 11/30/83, effective 1/1/84; WSR 82-24-047 (Order 82-38), § 296-17-521, filed 11/29/82, effective 1/1/83; Order 76-36, § 296-17-521, filed 11/30/76; Order 75-38, § 296-17-521, filed 11/24/75, effective 1/1/76; Order 74-40, § 296-17-521, filed 11/27/74, effective 1/1/75; Order 73-22, § 296-17-521, filed 11/9/73, effective 1/1/74.]