Design of composite beams with web openings
Summary Design techniques for composite beams with web openings have been under development for well over 30 years. During the past decade, these efforts have reached a level of maturity that allows for an accurate assessment of strength and the development of economical designs. This paper describes the behavior of steel}concrete composite beams with web openings and summarizes the key aspects of strength design and deflection calculation.
Behaviour of long span composite beams with precast hollow-core slabs
The use of precast hollow-core concrete slabs with Fabsec steel beams in composite construction has had little research conducted in this area. The main purpose of the research is to develop an understanding into the 
behaviour of this form of construction and to demonstrate the advantages of using Fabsec beams with precast hollow-core concrete slabs. 
 
To achieve this, five full scale bending tests were carried out supplemented by horizontal push tests. In addition to the experimental work described, an analytical study is conducted and design recommendations are made. The 
main issues were the compression behaviour of the hollow-core slabs and the transfer of the horizontal shear forces between the steel beam and the concrete slab. 
 
The aim of the research is to investigate the performance of composite beams with the position of the neutral axis in the concrete and also establish the effective width. By varying the beam size, span of beam, shear connection and slab depth in five full-scale experiments, the behaviour of the composite beam will be established.
Composite Beams with Web Openings: Design
A general method for the analysis and design of composite steel-concrete beams with openings centered in the web of the steel section is developed. The approach is based on ultimate strength concepts and allows for the presence of variable amounts of reinforcements in the web and partial shear connection. Design equations and a worked example are presented.