When preparing a bid for a California public works project, which cost component must be calculated using prevailing wage rates as determined by the Department of Industrial Relations?
Correct Answer
D) All direct labor costs for workers on the project
California Labor Code Section 1770 requires that all workers employed on public works projects be paid prevailing wages. Contractors must calculate labor costs using DIR-determined prevailing wage rates, which are typically higher than market rates and include fringe benefits, significantly impacting bid calculations.
Why This Is the Correct Answer
California Labor Code Section 1770 requires that all workers employed on public works projects be paid prevailing wages as determined by the Department of Industrial Relations (DIR). This applies to ALL direct labor costs — every craft and trade classification working on the project. Prevailing wages include both the base hourly rate and required fringe benefits (health, pension, vacation, training), making labor the largest budget impact of prevailing wage compliance.
Why the Other Options Are Wrong
Option A: Administrative overhead and profit margins
Administrative overhead and profit margins are not labor costs paid to workers and are not subject to prevailing wage requirements. The DIR sets rates for craft labor (carpenters, electricians, plumbers, etc.) — not for contractor overhead or profit calculations.
Option B: Equipment rental costs only
Equipment rental costs are not subject to prevailing wage rates. Prevailing wages apply to workers' compensation — the DIR does not regulate what contractors pay to rent equipment. Equipment costs use market rental rates.
Option C: Material costs and sales tax
Material costs and sales tax are governed by purchase contracts and tax law, not prevailing wage rules. The DIR's prevailing wage determinations apply exclusively to human labor, not physical materials.
Memory Technique
Prevailing Wage = ALL workers on PUBLIC works projects. Think 'PUBLIC = People (ALL of them).' The DIR determines the rate; the contractor must use it for every worker's labor cost in the bid.
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