In recent decades, environmental and safety concerns, particularly in high seismic risk areas have prompted engineers and designers to develop new wood and wood-based building products and systems. Modern structural products and systems made of solid wood (such as CLT and GLT) are just a few of the engineered wood products that now make it possible to build higher and over a larger area, while providing safety and a reduced environmental footprint.
The workshop on forest resources and wood products will highlight the various approaches now available, particularly through the fourth industrial revolution and the interconnectivity of tools, in order to enable sound management of forest resources and their optimal use in transforming them into sustainable, safe and low environmental footprint building products.
Moderator : Jean-Frédéric Grandmont, MFFP, Canada
Current condition of forests, and timber utilization in Japan
Speaker: Ichoro Nakajima, Sumitomo Forestry Co., Ltd., Japon
In terms of forests Japan is the third highest among the OECD countries. But there are a lot of issues in Japanese forestry, including the small scale of forest owners who have difficulties to maintain their forests. We should solve these issues and better use our forest resources through sustainable forest management. The demand for housing has been driving the timber market so far, but it is now shrinking. In order to utilize wood resources more, we should use timber for larger buildings, like office buildings, commercial facilities and hotels. Sumitomo Forestry’s announced W350 plan is a technical concept to construct a 350-metre-tall wooden skyscraper in 2041. We are developing not only building techniques but also technologies to enhance the value of wood.
Speaker: Takahiro Tsuchimoto, Building Research Institute, Japon
We started the R&D Project for the tall wood building as one of the subjects of Public/Private R&D Investment Strategic Expansion Program (PRISM) founded by the Cabinet Office, Japan. The project is aimed at the trial design of high-rise recovery apartment houses built with timber construction and the collection of supporting technical data.
Because Japan is a highly seismically active country, the construction methods used in Europe or North America are not applicable. Therefore, several construction methods were studied to build a 10-story timber construction. We studied several construction methods which varied floor/wall priority and used either wooden or steel beams. As the results of the structural analyses, it is difficult to make moment-resisting joints between the wall and the hanging wall strong. The cross-sections of the wooden beams become too large and impractical in a 10-story building.
The model building of 10-story wood frame (2×4) construction was assumed. The required shear wall capacity under the base shear of 0.2.was calculated as about 60 kN/m. The shear wall framed by 140 x 140 studs and 89 x 140 mm top and bottom plates with 30 mm plywood nailed by CN90 on both sides established the maximum shear capacity of about 58 kN/m in the several specifications considered.
Several construction methods that include post and beam construction with sheathing panels or braces or mega-structure with brace designs were reviewed. Stress analysis was conducted under the base shear of 0.2. As a result, we concluded that the 13-story mega-structure with braces included on the 4th, 8th and 13th brace storeys without residential space was the most realistic.
Building with Renewable Materials
Speaker: Steve Lieberman, Stora Enso, Finland
With a growing concern for the environment in the world in which we live, there is a renewed interest in utilizing building materials that do not adversely impact the environment. Where many materials may be recyclable, wood is the only renewable building material.
The advent of new Building Information Modeling (BIM) technology in conjunction with advances in wood manufacturing has allowed wood to be competitive with traditional building materials used in midrise and tall buildings while reducing the carbon footprint.
In this presentation we will discuss some examples, manufacturing, use and advantages of mass timber structures.
Build with Massive Wood in Uruguay – Status and prospects
Speaker: Matias Abergo, Enkel Group Company, Uruguay
Title to be confirmed
Speaker: Mostafa Mohammadabadi
Ichiro Nakajima was educated at the Osaka University of Arts. In April 1989, he joined Sumitomo Forestry, Co. Ltd., becoming the General Manager of its Product Development Department, Housing Division in April 2008. Two years later he became the General Manager of the Corporate Communications Department and attained the same position at the Intellectual Property Department in 2011. In April 2016 he moved to the Tsukuba Research Institute to become its General Manager and a year later was also named its Supervisory Officer.
Takahiro Tsuchimoto was born in 1967 at Chiba, Japan. He studied at the Laboratory of Wood-based Materials and Timber Engineering, Faculty of Forest Products, University of Tokyo, graduating in 1990 and holds a PhD in agriculture from the University of Tokyo (1998). The title of his dissertation was: “Studies on Nonlinear Mechanical Response of Timber Frame Structure.” He was an Assistant Professor at the Laboratory of Wood-based Materials and Timber Engineering from 1994 to 1999. Research Engineer, Department of Building Materials and Components, Building Research Institute, Japan from 1999 to present (becoming a senior research engineer in 2000 and the Chief Research Engineer in 2013).
Steve Lieberman is the North American Business Development Manager for Stora Enso Building Solutions.
A licensed structural engineer, Mr. Lieberman has over 30 years of experience in wood construction, engineering and manufacturing. With his passion for the advantages of wood construction, Mr. Lieberman’s focus is expanding the use of mass timber in North America.
Originally from Punta del Este, Uruguay, Matias Abergo studied International Business at the Catholic University of Uruguay. In 2006 he founded FATELCO (a technology and security company). In 2013, he created Steko South America, a company representing the “LEGO Blocks” Swiss-type wood system for the South American narket and in 2015 created the Enkel Group, a construction, importing and architectural firm. Constantly searching for systems that help improve in construction efficiency and costs, on a trip to Europe he discovered the CLT construction system and Glulam.
Upon discovering the benefits of this system, with the professionalization of the processes, reduced costs, and time and its great environmental benefit, Mr. Abergo dedicated himself to develop Massive Wood in his country. Not only trying to generate projects, the Enkel Group has funded research projects for the viability of Uruguayan CLT, created a working group for the implementation of a wood construction law, provided talks and to construction site visits for universities. The company is in the process of obtaining the DAT (technical aptitude document), technical permission to do business with the Government of Uruguay.
In 2018, Enkel Group built the first three-storey hotels in South America, this year another hotel is being built with CLT and in November construction began on the first CLT casino in Latin America.
His dream is to be able to provide to the Uruguayans and the region with homes and buildings that are efficient in costs, speed, interior quality of life and that generates a positive impact on CO2 emissions in construction.
Mostafa Mohammadabadi is a PhD candidate in the Material Science and Engineering Program at Washington State University. He received his master’s degrees in Mechanical Engineering from University of Tehran in his home country, Iran. As a master student, he focused on developing a theoretical model to evaluate laminated composite beams at the micro scale. Micro-scale structures are widely used in Micro-Electro-Mechanical-Systems (MEMS), such as micro-actuators. After joining WSU in 2016 as a PhD student, he started to work on bio-based composite materials. His research focuses on the use of small-diameter timber and low-quality materials in the fabrication of a high-performance corrugated core sandwich panel as a building material. After designing the core geometry and fabrication of sandwich panels, he developed experimental, theoretical and numerical models for its investigation.