Hoosier Prestress can bring any of the following courses to your workplace. Complete an online request form or view the invitation (PDF). School Facilities Design and Construction HSW Learning Unit Hours/CES Credits = 1.5 Hollow-Core Floors and Walls HSW Learning Unit Hours/CES Credits = 2.0 Precast Hollow-Core Design and Construction HSW Learning Unit Hours/CES Credits = 1.5 Precast Housing Structures Design and Construction HSW Learning Unit Hours/CES Credits = 1.5