Forests 2023, 14, 97. https://doi.org/10.3390/f14010097 www.mdpi.com/journal/forests Article Analysis Behavior of Openings on Full‐Size Cross‐Laminated Timber (CLT) Frame Shear Walls Tested Monotonically Rudi Dungani 1, *, Sulistyono 2 , Tati Karliati 1 , Yoyo Suhaya 1 , Jamaludin Malik 3 , Alpian 4 and Wahyu Supriyati 4 1 School of Life Sciences and Technology, Institut Teknologi Bandung, Bandung 40132, Indonesia 2 Faculty of Forestry, Kuningan University, Kuningan 45513, Indonesia 3 Research Center for Biomass and Bioproducts, National Research and Innovation Agency, Bogor 16610, Indonesia 4 Department of Forestry, Faculty of Agricultural, Palangka Raya University, Palangka Raya 73112, Indonesia * Correspondence: dunganir@gmail.com Abstract: Walls, as components of the lateral‐force‐resisting system of a building, are defined as shear walls. This study aims to determine the behavior of shear wall panel cross‐laminated‐timber‐ based mangium wood (Acacia mangium Willd) (CLT‐mangium) in earthquake‐resistant prefabri‐ cated houses. The earthquake performance of CLT mangium frame shear walls panels has been studied using monotonic tests. The shear walls were constructed using CLT‐mangium measuring 2400 mm × 1200 mm × 68 mm with various design patterns (straight sheathing, diagonal sheath‐ ing/45°, windowed shear wall with diagonal pattern and a door shear wall with a diagonal pattern). Shear wall testing was carried out using a racking test, and seismic force calculations were obtained using static equivalent earthquake analysis. CLT‐mangium sheathing installed horizontally (straight sheathing) is relatively weak compared to the diagonal sheathing, but it is easier and more flexible to manufacture. The diagonal sheathing type is stronger and stiffer because it has triangu‐ lation properties, such as truss properties, but is more complicated to manufacture (less flexible). The type A design is suitable for low‐intensity zones (2), and types B, D, E1 and E2 are suitable for moderate‐intensity zones (3, 4), and type C is suitable for severe‐intensity zones (5). Keywords: Acacia mangium; shear wall; monotonic test; seismic resistance; wood‐frame 1. Introduction Indonesia is an area prone to disasters and earthquakes, and there are many victims due to construction failures. It is necessary to build a livable house that is easy and fast to build, affordable, with materials available on‐site, that is easy to make and meets the re‐ quirements for a residential house in the form of a prefabricated house. Some of the ben‐ efits of building prefab houses are the fast construction time because they use industrial fabricated modules, a cleaner construction environment and more affordable costs [1]. Earthquakes cause lateral forces on buildings that are random and cyclic [2], depend‐ ing on the type of ground motions and the characteristics of the building structure [3,4]. Furthermore, in Indonesia, the most seismically active country [5], 85% of the residences are of a wood‐framed construction [6]. Shear walls are the vertical, lateral force‐resisting element in light‐frame constructions, and in 2010, over 90% of Indonesian wooden build‐ ings used them as the primary lateral load‐resisting system. These structural components perform very well in high winds and seismic‐prone zones [7]. Many attempts have been made by several researchers to investigate the shear re‐ sistance of structures to prevent wall sliding by improving the design of shear walls. Di Gangi et al. [8] designed light‐frame bamboo shear walls with various height‐to‐length Citation: Dungani, R.; Sulistyono; Karliati, T.; Suhaya, Y.; Malik, J.; Alpian; Supriyati, W. Analysis Behavior of Openings on Full‐Size Cross‐Laminated Timber (CLT) Frame Shear Walls Tested Monotonically. Forests 2023, 14, 97. https://doi.org/10.3390/f14010097 Academic Editors: Jakub Kawalerczyk, Radosław Mirski and Joanna Walkiewicz Received: 26 November 2022 Revised: 24 December 2022 Accepted: 28 December 2022 Published: 4 January 2023 Copyright: © 2023 by the authors. Li‐ censee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and con‐ ditions of the Creative Commons At‐ tribution (CC BY) license (https://cre‐ ativecommons.org/licenses/by/4.0/).