Site Work – Subsurface investigation, borings,  Containment of hazardous waste,  Landfill gas and leachate control,  Collection of waste,  Decontamination,  Underground storage tank removal,  Structure moving,  Clearing and grubbing,  Interior building demolition,  Selective demolition,  Asbestos removal,  Site grading,  Rock removal,  Embankment & compaction,  Trenching & backfilling,  Structural excavation,  Compaction water,  Horizontal boring, casing only,  Bulk excavation,  Site excavation and fill,  Compaction,  Field tests,  Soil stabilization,  Vibro-flotation soil stabilization ,  Soil treatments and tests,  Finish grading for structures,  Drilling and pressure grouting,  Rip rap,  Gabions,  Soil cement,  Erosion control fabrics,  Tunneling instrumentation,  Tunnel and shaft excavation,  Prestressed concrete piles,  Steel H-section piles, rolled steel,  Steel pipe piles,  Concrete filled steel shell piles,  Wood piles,  Drilled caissons,  Steel sheeting shoring,  Wood sheeting,  Wales and shores,  Bin type retaining walls,  Rock bolting,  Irrigation systems,  Concrete pipe,  Reinforced concrete pipe,  Prestressed 150 PSI concrete pipe,  Ductile iron pipe,  Welded steel pipe,  Steel pipe,  Corrugated metal pipe,  Corrugated polyethylene pipe,  Extra strength vitrified clay pipe,  ABS plastic drainage pipe,  Foundation drainage under drains,  Underslab drainage,  Storm drains,  Sand drains,  Relief wells,  Soil stabilization,  Erosion control,  Membrane lining systems,  Gas distribution lines,  Natural gas meters,  Power cost, Fuel cost, Water cost,  Water distribution lines,  Water wells,  Chilled water distribution,  Waste water collection,  Paving and surfacing,  Crushed stone paving,  Bituminous concrete paving,  Cold milling of pavement,  Portland cement concrete paving,  Roller compacted concrete,  Roadway repair and resurfacing,  Pavement sealing,  Pavement marking,  Curbs and gutters,  Sidewalk,  Aviation fuel distribution,  Chain link fences,  Wire and misc. metal fences,  Wood fencing,  Parking appurtenances,  Guard rails,  Traffic signage,  Parking barriers,  Playing field seating,  Recreational facilities,  Yard improvements, fountains,  Planter boxes,  Trash containment,  Landscape seeding,  Top soil,  Lawns maintenance

Concrete – Structural concrete formwork,  Concrete reinforcing steel,  Welded wire fabric,  Stressing tendons,  Fibrous concrete reinforcement,  Concrete expansion joints,  Waterstops,  Concrete admixtures,  Concrete curing,  Normal weight structural concrete,  Concrete topping,  Exposed aggregate concrete,  Rusticated concrete finish,  Solid board concrete finish,  Flexural concrete,  Grooved concrete surface,  Specially placed concrete,  Gunite (shotcrete),  Roller compacted concrete,  Precast wall panels,  Precast deck,  Precast structural sections,  Miscellaneous precast items,  Precast prestressed concrete,  Precast retaining walls,  Gypsum concrete deck,  Insulating concrete roof deck,  Cementitious wood fiber planks,  Grout for equipment bases,  Grouting for joints,  Mechanical concrete cleaning

Masonry – Cement and lime mortars,  Masonry accessories, reinforcing,  Anchors and tie systems,  Control joints,  Mortar,  Scaffolding, tubular steel,  Brick masonry,  Structural glazed tile,  Concrete unit masonry,  Glazed concrete unit masonry,  Precast structural units for masonry,  Pre-assembled masonry panels,  Clay backing and partition tile,  Terra cotta coping (veneer),  Glass unit masonry,  Sound absorbing unit masonry,  Sound absorbing glazed tile,  Stone,  Marble ,  Limestone panels,  Granite panels,  Slate,  Masonry cleaning,  Masonry restoration,  Refractories, flue liners

Metals – Structural steel metal framing,  Structural aluminum,  Wire rope and accessories,  Steel chain and accessories,  Standard steel joists,  Metal roof and floor deck,  Anchor bolts,  Expansion bolts,  Anchor rings,  Hex bolts,  Threaded rods,  Metal stairs,  Pipe and tube railing,  Grating,  Castings,  Cutting and drilling,  Cable and accessories,  Water control devices,  Ornamental metal handrail and railings,  Ornamental sheet metal louvers,  Expansion joint covers

Wood and Plastics – Light wood framing,  Sheathing, Siding, Subflooring,  Mill framed structures,  Mouldings,  Preservative treated lumber,  Fire retardant treated lumber,  Kiln drying treatment,  Cabinetwork,  Paneling,  Fiberglass,  Plastic netting,  Fasteners, Anchors, Supports

Thermal & Moisture Protection – Elastomeric waterproofing,  Bituminous waterproofing,  Modified asphalt waterproofing,  Liquid waterproofing,  Bentonite waterproofing,  Metallic oxide waterproofing,  Dampproofing,  Bituminous dampproofing,  Sprayed silicone dampproofing,  Cementitious dampproofing,  Building insulation,  Loose fill insulation,  Rigid insulation for roofs,  Sprayed on insulation,  Freezer & chiller panel insulation,  Shingles,  Tile roofing,  Preformed roofing,  Siding,  Built-up bituminous roofing,  Prepared roll roofing,  Elastic sheet roofing,  Fluid applied roofing,  Inverted roof system,  Sheet metal roofing,  Flashing and trim,  Gutters and downspouts,  Flashing,  Gravel stops,  Vents,  Plastic skylights,  Metal framed skylights,  Roof hatches,  Access doors,  Gravity ventilators,  Joint fillers and gaskets,  Sealants and caulking

Doors and Windows – Steel doors and frames,  Metal semi-circular head doors,  Aluminum doors and frames,  Wood doors,  Wood semi-circular head doors,  Sliding metal fire doors,  Motor operated fire doors,  Sliding metal clad doors,  Hanger doors,  Coiling doors,  Coiling grilles,  Telescoping doors,  Bi-folding doors,  Accordion folding doors,  Flexible doors,  Sectional wood overhead doors,  Sectional metal overhead doors,  Sliding glass doors,  Vertical lift doors,  Screen and storm doors,  Cold storage doors,  Storefront doors,  Revolving doors,  Steel windows,  Aluminum windows,  Wood windows,  Finish hardware,  Door operators,  Weatherstripping and seals,  Thresholds,  Plate and float glass,  Sheet glass,  Tempered safety-glass,  Wired glass,  Rough and figured glass,  Bullet resistant glass,  Spandrel glass,  Coated glass,  Laminated glass,  Insulating glass,  Mirror glass,  Plastic glazing,  Glazing accessories

Finishes – Partition & wall systems,  Gypsum plaster,  Cement plaster,  Plaster accessories,  Gypsum wallboard systems,  Gypsum wallboard accessories,  Ceramic tile,  Unglazed tiles,  Quarry tile,  Conductive tile,  Portland cement terrazzo,  Precast terrazzo,  Conductive terrazzo,  Acoustical ceiling panels,  Acoustical ceiling tiles,  Metal ceiling systems,  Acoustical insulation & barriers,  Ceiling suspension systems,  Wood strip flooring,  Wood parquet flooring,  Gym floors,  Wood block industrial flooring,  Resilient flooring,  Fluid applied resilient flooring,  Conductive resilient flooring,  Carpet and padding,  Carpet,  Epoxy marble chip flooring,  Brick flooring,  Floor mats,  Sprayed fireproofing,  Exterior painting,  Interior painting,  Transparent finishes,  Hydraulic structure work,  Vinyl wall coverings,  Cork wall covering,  Wall fabrics,  Corner guards,  Flexible wood sheets

Specialties – Hospital cubicles,  Toilet partitions and urinal screens,  Metal toilet partitions,  Shower & dressing compartments,  Turnstiles,  Pest control,  Flagpoles,  Directory and bulletin boards,  Plaques,  Signs,  Wardrobe lockers,  Box lockers,  Basket lockers,  Fire extinguishers accessories,  Fire extinguisher cabinets,  Mail chutes,  Mail boxes,  Demountable partitions,  Metal partitions, movable,  Wire mesh partitions,  Metal storage shelving,  Wood shelving,  Toilet and bath equipment,  Dispensers and receptacles,  Medicine cabinets,  Ash trays,  Shower curtain rod,  Janitorial accessories,  Hand dryers,  Hospital accessories,  Wardrobe specialties,  Window treatment

Furnishings – Drapery accessories

Special Construction – Access and pedestal floors,  Radio frequency shielding,  Underground storage tanks,  Treatment of hazardous waste,  Primary treatment of waste,  Secondary waste treatment,  Tertiary treatment,  Chemical fixation & stabilization,  Sludge treatment,  Thermal treatment and destruction,  Disposal of hazardous waste,  Nuclear construction,  Pre-engineered buildings,  Metal building systems,  Vaults,  Swimming pool equipment,  Energy monitoring and control

Conveying Systems – Collective elevators,  Automatic elevators,  Hydraulic elevators,  Small elevators,  Freight elevators,  Collective freight elevators,  Hydraulic freight elevators,  Industrial hoists,  Overhead traveling bridge cranes,  Chair lifts,  Vehicular lifts,  Ash hoists,  Commercial lifts,  Material handling & transportation,  Linen chutes,  Trash chutes,  Waste handling systems,  Escalators,  Moving sidewalks,  Pneumatic message systems,  Pneumatic trash systems

Mechanical – Valve tags,  Piping systems identification,  Balancing of HVAC systems,  Testing, startup and checkout,  Steel pipe,  Steel pipe fittings,  Roll grooved steel pipe fittings,  Galvanized steel pipe fittings,  Cast iron pipe,  Copper pipe,  Plastic pipe,  Glass pipe,  Stainless steel pipe,  Rubber hose,  Piping specialties, Swivel joints,  Strainers, filters and driers,  Basket strainers,  Vacuum breakers,  Shock absorbers,  Medical gas system specialties,  Wall seals, sleeves, holes,  Flashing and safing,  Hangers and supports,  Valves, cocks and faucets,  Gate valves,  Flap and flush valves,  Butterfly valves,  Ball valves,  Globe valves,  Wall hydrants,  Check valve,  Swing check valves,  Backwater valves,  Faucets (hose bibbs),  Washer and dryer outlets,  Flow control valves,  Pressure regulating valves,  Pressure relief valves,  Solenoid valves,  Steam traps,  Tempering controllers,  Trap primers,  Pumps,  Centrifugal pumps,  Rotary pumps,  Turbine pumps,  Sump pumps,  Submersible pump,  Pneumatic ejectors,  Pneumatic pumps,  Vacuum pumps,  Medical air compressors,  Vibration isolation,  Piping expansion joints,  Flow measuring devices,  Steel tanks,  Plastic tanks,  Gas storage tanks,  Piping insulation,  Tempered water piping ,  Insulation foam rubber,  Duct insulation,  Booster pumping equipment,  Water reservoirs and tanks,  Filtration equipment,  Water softening equipment,  Water deionizers,  Chlorinating equipment,  Chemical feeders,  Water filters,  Water metering, Sewage ejectors, submersible,  Grease interceptors,  Sewage treatment equipment,  Aeration equipment,  Floor and shower drains,  Roof drains,  Cleanouts,  Domestic water heaters,  Commercial water heaters,  Sediment interceptors & separators,  Waste and vent piping,  Plumbing fixtures and trim,  Plumbing fixture carriers,  Domestic water coolers,  Bath & shower valves & heads,  Shower receptors and enclosures,  Swimming pool equipment,  Circulation and filtration equipment,  Swimming pool cleaning equipment,  Chemical treatment equipment,  Fan coil units,  Packaged heating and cooling,  Packaged heat pumps,  Computer room air conditioners,  Humidifiers,  Dehumidifiers,  Furnaces,  Centrifugal fans,  Propeller fans,  Fly fans,  Axial flow fans,  Exhaust fans,  Power roof ventilator,  Power wall ventilators,  Roof ventilators,  Fans,  Air handling units,  Ductwork,  Duct lining,  Tailpipe exhaust equipment,  Breeching and smoke pipe,  Manual dampers,  Dampers, motorized,  Fire dampers,  Smoke and fire dampers,  Turning vanes,  Distribution devices,  Duct access panels and doors,  Wall and floor diffusers,  Ceiling diffusers,  Louvers,  Air treatment equipment,  Air separators,  High efficiency filters,  Dust collectors,  Sound attenuators,  Air compressors and dryers,  Primary HVAC control devices,  Thermostats,  Humidistats,  Static pressure controllers,  Aquastats,  Freezestats,  Carbon monoxide detectors,  Control dampers,  Control valves,  Control motors,  Relays and switches,  Timers,  Recorders

Electrical – Basic materials and methods,  Cable instalation methods,  Raceways,  Conduit,  Bus duct,  Underfloor ducts,  Cable trays,  Metal framing materials,  Wire and cable,  Wire connections and devices,  Multi-conductor cables,  Boxes,  Wiring devices,  Motors and equipment,  Motor mounting,  Motor starters,  Motor and circuit disconnects,  Circuit breakers not in panel,  Motor generator sets,  Automatic transfer equipment,  Uninterrupted power systems,  Primary unit substations,  Secondary unit substations,  Sectionalizing switches,  Transformers,  Underground distribution,  Pole line construction,  Metering,  Ground fault protection,  Grounding,  Copper conductors,  Ground rods,  Ground clamps and fittings,  Cadweld bonding,  Grounding equipment,  Distribution switchboards,  Branch circuit panelboard,  Lighting fixtures,  Architectural lighting fixtures,  Commercial lighting fixtures,  Industrial fixtures,  Exterior lighting fixtures,  Exterior wall mounted fixtures,  Walkway lighting,  Flood lights,  Street lighting,  Exterior area lighting,  Special purpose lighting fixtures,  Poles and standards,  Aviation lighting system,  Emergency light and power,  Battery charging equipment,  Special electrical distribution,  Cathodic protection,  RF filters,  Alarm and detection systems,  Fire alarm & detection panels,  Clock and program systems,  Telephone equipment,  Intercommunication equipment,  Public address equipment,  Closed circuit television,  Fiber optics cable,  Intrusion detection system,  Electric resistance heating,  Electric duct heaters & reheaters,  Electric heaters,  Motor control centers,  Motor control centers,  Factory installed accessories,  Lighting control equipment,  Electric HVAC controls,  Limit switches,  Sensing devices,  Level switches,  Control cabinets