This master thesis deals with Hybrid Cross Laminated Timber Plates, also called HCLTP. In the initial part of the paper we illustrate why we need this kind of building products. Similar products that are either already on the market or are - like HCLTP - still in the development stage are described later on. Featured are methods by which we design CLT. With some modifications they are also suitable for HCLTP. More in detail the thesis deals with the destructive mechanisms in bending failure of HCLTP. I processed the results of experimental tests on two types of samples, where I participated in the preparation of all samples and conducting all the tests. With small samples, we investigated the shear fracture between the panel and the rib. With large samples (plates with three ribs with span of 4 m) I studied bending failure of HCLTP. Test results were compared with the results of analyzes by the finite element method which we have modeled in SAP 2000.