Retaining Walls, Pool & Pavement designs SE&T provides design services for various types of retaining walls including steel, rock, concrete, masonry, and Keystone walls. SE&T also provides pool designs for residential, commercial, indoor and outdoor pools. SE&T provides design recommendations for pavement construction. Sam Engineering & Testing, LP 1115 Luke St., Suite #100 | Irving, TX 75061 Phone: 972-790-1910  |  Email: