For the intents and purposes of the Washington state public works law, chapter 39.12 RCW, laborers perform a variety of tasks such as:

• Erect and repair guard rails, median rails, guide and reference posts, sign posts and right of way markers along highways.

• Mix, pour and spread asphalt, gravel and other materials, using hand tools, and mix, pour, spread and rod concrete.

• Lift, carry and hold building materials, tools and supplies.

• Measure distances from grade stakes, drive stakes and stretch tight line.

• Bolt, nail, align and block up under forms.

• Signal operators of construction equipment to facilitate alignment, movement and adjustment of machinery to conform to grade specifications.

• Level earth to fine grade specifications, using pick and shovel.

• Mix concrete, using portable mixer.

• Position, join, align, wrap and seal pipe sections.

• The placement and testing of plastic conduit for electrical cable, when the conduit is buried underground.

• Erect scaffolding, shoring and braces.

• Mop, or spread bituminous compounds over surfaces for protection (outside buildings).

• Spray material such as water, sand, steam, vinyl, or stucco through hoses to clean, coat or seal surfaces.

• Apply caulking compounds by hand or with caulking gun to seal crevices.

• The application of penetrating sealer and primer protective coatings to concrete floors and steps when safe to walk on.

• Installation of plastic panels on the inside of existing window frames for insulation (instead of storm windows). The panels are held in place magnetically (with metal brackets) and with self-taping screws.

The cleaning and grinding of concrete floors and walls by high pressure waterblasting or sandblasting preparatory to the application of waterproofing.

• The removing of rough or defective spots from concrete surfaces, using grinder or chisel and hammer and patching holes with fresh concrete or epoxy compound when not preparatory to sacking (finishing a large surface of patched holes).

• The setting of concrete curb, gutter and sidewalk forms as a composite crew with cement masons.

• The laying of concrete, granite and brick pavers in beds of sand.

• General cleanup required after damage caused by water or fire.

All clean-up work required in connection with the above work. Clean tools, equipment, materials and work areas:

(1) When the cleanup is performed for more than one trade (usually employed by general contractor).

(2) When assisting those trades for which laborers have been specifically designated as tenders, e.g., carpenter tender, cement finisher tender, etc.