Class Code 6003
Pile Driving; Wharf Building; Bridge/Trestle Construction – Wood
Class Code 6003 applies to California operations that drive timber piles and build or repair wooden wharves, bridges and trestles. This classification covers the marine and waterfront methods, equipment, and crews used in those projects, and carries an approved pure premium rate of $9.738 per $100 of payroll. Understanding the exposures in this class helps employers control losses, comply with Cal/OSHA, and correctly price payroll for workers' comp.
What Class Code 6003 Covers
This code specifically covers work involving driving, splicing, cutting and setting timber piles; constructing and repairing wooden wharves, piers and bulkheads; and building or restoring wooden bridges and trestles. Typical operations include impact and vibratory pile driving, pre-drilling and jetting, setting pile templates, fitting and fastening pile caps and stringers, demolition and removal of old timber piling, and working from barges, floating platforms or cofferdams. Equipment and methods include impact hammers, vibratory hammers, pile drivers mounted on cranes or barges, cranes and derricks for lifting piles, rigging gear, pile splicing tools, chainsaws and handheld carpentry tools. Work covered by 6003 is distinct from general carpentry or concrete piling because the primary activity is timber piling and marine/over-water structural work.
Who It Applies To
- Marine construction contractors that drive timber piles for docks, piers and wharves
- Companies that build or rebuild wooden trestle and timber bridge approaches
- Subcontractors who provide pile-driving crews and rigging services
- Harbor and port contractors performing wooden bulkhead or pier repairs
- Barge-based piling crews, pile drivers and deck carpenters working over water
Common Job Duties
- Operating impact or vibratory pile driving equipment mounted on barges or cranes
- Rigging and positioning timber piles, templates and pile shoes
- Cutting, splicing and fitting timber piles, caps and stringers with hand and power tools
- Maintaining and servicing hammers, leads, pile templates and lifting gear
- Working from floating platforms, scaffolds, ladders or elevated trestle decks
- Performing underwater inspections or coordinating with commercial divers for pile placement
Common Injury Risks
Understanding the $9.738 Rate
The approved pure premium rate of $9.738 per $100 of payroll is the portion of premium intended to cover expected claim costs for this classification. To calculate the pure premium: divide payroll by 100 and multiply by 9.738. Insurers then add expense loadings, policy fees, credits or debits (including experience modification or EMR), and state assessments to produce the final premium an employer pays.
Cal/OSHA Compliance Requirements
Cal/OSHA construction standards (Title 8) apply to pile-driving and over-water construction and require written programs and training for fall protection, crane and rigging safety, scaffolding, confined-space entry and hazard communication. Employers must enforce personal flotation devices and man-overboard procedures when work is over or adjacent to water, maintain pre-shift equipment inspections, and implement heat illness prevention and site-specific safety plans for marine operations.
How Key HR Helps Employers Under Class Code 6003
A PEO like Key HR helps employers in class 6003 by ensuring correct payroll classification and timely payroll reporting, providing targeted safety programs and toolbox talks for pile driving and marine work, and managing claims and return-to-work to protect experience modification. Key HR also coordinates loss-control visits, specialty training (rigging, crane signaling, over-water rescue), and certificate-of-insurance handling to reduce claims exposure and help control workers' comp costs.
Get a QuoteFrequently Asked Questions
How do I know whether my crew should be classified under 6003 instead of a general construction code?
Use 6003 when the primary activity is timber pile driving, wharf/wharf repair or construction of wooden bridges/trestles, especially when work is performed from barges or over water. If most payroll is for pile-driving crews, riggers and deck carpenters on those tasks, 6003 is appropriate; otherwise other codes such as general carpentry may apply.
What on-site safety steps most reduce workers' comp costs for pile-driving work?
Focus on rigging inspections and certified operators, comprehensive fall protection and PFD use, pre-shift hazard assessments for tides/currents, preventive maintenance of hammers and leads, hearing protection programs, and documented tool-box talks and training. Those controls reduce frequency and severity of costly struck-by, fall and drowning claims.
Does working from barges change coverage or premium?
Yes—over-water exposure raises risk and often leads to closer underwriting scrutiny. Employers must document marine safety procedures, ensure vessel and PFD compliance, and correctly report payroll to the 6003 classification; strong safety programs and training can mitigate higher loss costs and positively influence premiums and EMR.
Quick Facts
- Class Code
- 6003
- Classification
- Pile Driving; Wharf Building; Bridge/Trestle Construction – Wood
- Pure Premium Rate
- $9.738 / $100 payroll
- Effective Date
- September 1, 2026
- Source
- WCIRB Approved Filing
Manage Workers' Comp Through a PEO
Key HR provides pay-as-you-go workers' comp for California employers — no large deposits, no audits, better rates.
Get a Quoteor call (800) 922-4133Ready to Simplify Workers' Comp for Class Code 6003?
Key HR provides California employers with pay-as-you-go workers' comp, HR compliance support, and payroll — all through one PEO partnership.