Members of the Teamsters union have authorized a strike against Costco on Feb. 1 unless they reach a deal with the warehouse retailer before the current contract expires on Jan. 31.

The union said 18,000 Costco workers are set to go on strike at 56 of the company’s warehouse stores spread across five states after 85% of members voted to authorize a strike. In addition to disagreements on wages and benefits, the union said Costco had rejected union proposals dealing with seniority pay, paid family leave, bereavement policies, sick time, and safeguards against surveillance.

The company did not respond to a request for comment on the strike vote.

The Teamsters covered by the Costco national contract make up 8% of the 219,000 U.S. employees that the company has at 616 U.S. stores, according to company filings. But a strike by that many workers represents a major strike for a U.S. retailer, which is overwhelmingly non-union. Labor Department statistics show less than 5% of retail workers are represented by unions. Most are in the grocery store sector.... Read More: WBAL TV