Liability and litigation are the biggest barriers overseas firms face in accessing the U.S. engineering and construction market that are not similarly faced by American firms seeking work abroad, says a survey by the Construction Industry Round Table, a McLean, Va., group of 100 CEOs of major U.S. firms. “The U.S. still owns the market in this,” said CIRT President Mark A. Casso at a meeting last month in Paris of the Organization for Economic Cooperation and Development, which is studying construction trade barriers among its European country members. The study found tax regulation is a barrier for U.S. firms overseas, but faced less intensely by foreign firms here. Company ownership rules and contracting legal issues were two other areas showing divergence.