Crain Atlantis Engineering structural design engineering services includes structural steel, wood, CMU, masonry and cold form framing; prestressed concrete girder, U-beam, box Beam and slab beams, cast-in-place concrete slab spans and box celled post-tensioned girder system; retaining walls; slabs-on-grade on piers, spread footings or helical piles; structural slabs on piers or auger cast piles; and lateral force analysis.