Additive manufacturing, commonly known as 3D printing, is an evolutional technology in the manufacturing industry. This technology has already been embraced by different industries, such as aerospace and biomedical engineering, and the recent advance in this technology has generated a vast of societal excitement for its future. Despite the exciting prospect of its application in civil engineering, additive manufacturing technology is still at a perceived stage for construction industry. The benefits and potential in construction industry are rarely known in the field at this stage. This paper aims to investigate the material properties and structural performance of additive manufactured high strength steel square and rectangular hollow sections (SHS and RHS) in cross section level through experimental program. The specimens were additively manufactured from H13 steel powder by Selective Laser Melting (SLM) with three different printing patterns, where the typical yield strength of the conventionally manufactured H13 steel is around 1650 MPa. The test program comprised tensile coupon tests, hardness tests as well as geometric imperfection measurements and stub column tests. The anisotropy on material properties was examined through tensile coupon tests in both longitudinal and transverse directions. The influences of printing pattern on material properties and structural behavior of additive manufactured high strength steel SHS and
RHS stub columns were also investigated. The test results were used to assess the applicability of existing design provisions in the American Specification, Australian Standard and European Code that originally developed for conventionally produced tubular sections to the additive manufactured high strength steel tubular sections in this study.