Applies to employees of construction or erection contractors who work as cost and materials estimators preparing bids for contracts away from their employer's business offices. Employees covered by this rule may have exposure to the hazards of job sites, customer's premises, and/or undeveloped land. This classification is restricted in that employees reported in it cannot have any other duties other than construction estimating during their work shift or work day. Any employee working as an estimator and having any construction-related duties during the same work shift or day is to be reported separately in the applicable construction or erection classification for that entire work shift.