In the process of creating composites, especially if we talk about wood-based composites, great attention should be paid on a variety of factors which affect the final composite properties.One of the essential elements is proper adhesive selection. Most common used are synthetic formaldehyde adhesives. We are aware how dangerous emission of free formaldehyde can be; we tend to minimize its usage. Using adhesives which are safe for the environment and humans as well, we tend to find safer composites which are ecologically acceptable and recognized as a better option.The paper briefly describes the adhesives used so far and their dangers, and selects several types of adhesives with basic characteristics that can meet the requirements for the production of ecologically acceptable composite panels, with an emphasis on wood-based composites. Certain tests and achievements in the development of these adhesives are also presented.

Determination of tensile shear strength of lap joints is carried out according to three standards: BAS EN 205:2018 for adhesives used for non–load–bearing structures, and according to BAS EN 302-1:2014 for adhesives used for the manufacture of load-bearing structures and according to EN 14257:2019 for lap joints who are exposed to elevated temperatures. The paper presents the results of tensile shear strength of lap joints made of solid fir/spruce (Abies alba ssp./Picea abies spp). Tensile shear strength was tested in 4 groups of tests samples. The Group 1 consisted the samples were 7 days in standard atmosphere [20/65]. The Group 2 consisted the samples were previously soaked in water at (20 ± 5) °C, then recondition in standard atmosphere [20/65]. The Group 3 consisted the samples were previously 6 h soaked in boiling water 2 h, then soaked in water at (20 ± 5) °C; the samples tested in the wet state. The Group 4 consisted the samples were previously exposed to heat in a preheated fan oven, at (80 ± 2) °C, for (60 ± 2) min. The test results can be applied for gluing windows, doors, stairs, high-frequency gluing, veneering panels, etc.

Particleboards are used in the manufacture of furniture, as well as the furnishing of structures and prefabricated homes. Their quality dictates where they can be used and how long they can last. The boards’ characteristics deteriorate as they are used. To examine the change-degradation of the properties of the boards are exposed to the effects of the external climate (rain, snow, wind, sun) or regimes of accelerated aging. For this purpose, a degradation test of the properties of wood-based panels was performed, which aims to create a model that will describe the change in bending strength of the mentioned panels. The paper presents the results of bending strength and thickness swelling tests of 16 mm thick particleboards that were exposed to accelerated aging regimes, and the basic model of property degradation.

SAŽETAK: Uporaba drvenih lameliranih nosača posljednjih desetljeća sve je veća zahvaljujući upravo karakterističnim prednostima ovih nosača u odnosu na nosače od drugih materijala – mala vlastita težina (od 400 do 600 kg/m3), dobra mehanička svojstva u odnosu na težinu (tlačna čvrstoća od 40 do 80 MPa, vlačna čvrstoća i do 180 MPa), mogućnost proizvodnje izrazito dugih nosača (dužine i do 100 m), te mogućnost različitog oblikovanja (nosači mogu biti ravni, zaobljeni, kružni). Proces proizvodnje drvenih lameliranih nosača razlikuje se u zavisnosti od primijenjenog tipa tehnologije – klasična ili sofisticirana (automatizirana) tehnologija. Linije za proizvodnju drvenih lameliranih nosača primjenom klasične i sofisticirane tehnologije prikazane su u ovom radu. Također su predstavljeni aspekti zaštite na radu pri izradi drvenih lameliranih nosača primjenom spomenutih tehnologija s težištem na zaštitu zdravlja i sigurnost na radu pri proizvodnji drvenih lameliranih nosača u Bosni i Hercegovini. Analiziran je proces proizvodnje drvenih lameliranih nosača i za svaku navedenu tehnologiju detektirana su moguća mjesta rizika i tip opasnosti za zdravlje i sigurnost na radu za radnike koji sudjeluju u procesu. U ovome radu prikazani su važni i potrebni koraci te specifične mjere zbog osiguranja zaštite zdravlja i sigurnosti na radu u procesu proizvodnje drvenih lameliranih nosača. Njihova primjena utječe na smanjenje troškova proizvodnje, pravnih sporova i stope bolovanja.

ABSRACT New advanced production techniques combined with the Internet of things enable the concept of a digital manufacturing company that is not only interconnected but communicates, analyzes and uses information to encourage further intelligent action back into the physical world. The process of making wooden prefabricated buildings changes with the application of new technologies, digitization and automation in design phases, component manufacturing and / or entire buildings, prefabricated buildings, and the whole process of marketing. The paper will be presented some aspects of the impact of advanced technology on the process of making wooden prefabricated buildings.

Raising awareness on sustainable, energy-efficient building construction affects the need to improve the characteristics of the window. More and more smart homes build. Windows and doors built into these homes must meet certain requirements to ensure that the quality of stay in these homes is at the desired level. For this reason, significant research and improvement of window characteristics has been carried out in recent years and decade. Solutions include the use of sensors, control units and sophisticated equipment to provide improved window characteristics. This paper will present some of the solutions improving the characteristics of the windows so that are rightly call smart windows.