Mass Plywood (MPP) Concrete Composite Floor Systems

Research Team:

Andre Barbosa

Arijit Sinha

Project Duration:



Agricultural Research Services


In order to facilitate adoption of new mass timber products into practice, physical testing is required to understand and predict structural behavior. While extensive testing has been conducted at Oregon State on basic engineering properties of mass plywood panels (MPP) and MPP-to-MPP connections, there exists no experimental data on connections between MPP and other timber members (e.g. glulam) or on composite behavior of MPP with a concrete topping. Previous testing on CLT concrete-composite systems looked at different CLT-to-concrete connection systems, with HBV shear connectors-steel plates partially embedded in the timber with epoxy resin- as a strong candidate in terms of strength and stiffness performance. This project will focus on exploring the performance of MPP-concrete composite systems with HBV connectors.

Project Overview

Component Testing – characterize the tension and shear capacity of a novel connection system between MPP and concrete and timber-to-timber based on the HBV mesh concept.
Element Testing – MPP panels will be tested for both one and two-way strength and stiffness properties in bending, as well as for in plane shear to characterize diaphram performance. Testing variants will include dry and composite assemblies with three different thicknesses of MPP and two different thicknesses of concrete.
Full System Testing – This task will include the testing of two full-scale solutions including MPP-to-Glulam connections in conjunction with a MPP-concrete composite floor system. Full-scale continuous floor span test to establish strength at realistic spans and to understand the influence of continuity.