Skip header and navigation

Refine Results By

10 records – page 1 of 1.

Research Needs Assessment for the Mass Timber Industry: Proceedings of the 2nd North American Mass Timber Research Needs Workshop

https://research.thinkwood.com/en/permalink/catalogue2164
Year of Publication
2019
Topic
General Information
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
NLT (Nail-Laminated Timber)
Glulam (Glue-Laminated Timber)
Timber-Concrete Composite
Application
Shear Walls
Walls
Wood Building Systems
Floors
Columns
Bridges and Spans
Author
Zelinka, Samuel
Williamson, Tom
Martinson, Karen
Ritter, Michael
Organization
Forest Products Laboratory
Year of Publication
2019
Country of Publication
United States
Format
Report
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
NLT (Nail-Laminated Timber)
Glulam (Glue-Laminated Timber)
Timber-Concrete Composite
Application
Shear Walls
Walls
Wood Building Systems
Floors
Columns
Bridges and Spans
Topic
General Information
Keywords
Mass Timber
North America
Research Needs
Research Priorities
Seismic Performance
Fire Performance
Language
English
Research Status
Complete
Summary
The 2nd Mass Timber Research Needs Assessment was held on November 13–14, 2018, at the USDA Forest Service, Forest Products Laboratory (FPL). The workshop was co-sponsored by FPL, WoodWorks, and the U.S. Endowment for Forestry and Communities. The purpose of the workshop was to gather a diverse group of people with expertise in mass timber, in particular cross-laminated timber, to discuss and prioritize research needed to move the mass timber industry forward in North America. The workshop was attended by more than 100 design professionals, researchers, manufacturers, industry leaders, and government employees. The meeting resulted in a list of 117 research needs. Following the meeting, the list of research needs was prioritized through an online survey. This report presents the prioritized research needs of the mass timber industry in North America. Also included in the appendixes are the formal minutes of the workshop, a list of participants, and the original scribe notes.
Online Access
Free
Resource Link
Less detail

Lumber-Based Mass Timber Products in Construction

https://research.thinkwood.com/en/permalink/catalogue2163
Year of Publication
2019
Topic
General Information
Material
Glulam (Glue-Laminated Timber)
NLT (Nail-Laminated Timber)
DLT (Dowel Laminated Timber)
CLT (Cross-Laminated Timber)

Innovation in Hybrid Mass Timber High-Rise Construction: A Case Study of UBC’s Brock Commons Project

https://research.thinkwood.com/en/permalink/catalogue1273
Year of Publication
2017
Topic
General Information
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
PSL (Parallel Strand Lumber)
Application
Hybrid Building Systems
Author
Fallahi, Azadeh
Organization
University of British Columbia
Year of Publication
2017
Country of Publication
Canada
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
PSL (Parallel Strand Lumber)
Application
Hybrid Building Systems
Topic
General Information
Keywords
High-Rise
Construction
Design
Prefabrication
Project Coordination
Virtual Design and Construction
Language
English
Research Status
Complete
Summary
With the advocacy for sustainable construction on the rise, use of timber as the main building material is being championed in large-scale construction projects. While the advancement of engineered timber products is addressing some issues that previously limited the use of wood in high-rise construction, there are still challenges such as fire and weather safety, code compliance and negative public perceptions. One main gap in the available resources is the lack of a comprehensive and detailed case study of a high-rise project with wood as the main construction material to capture constraints and innovations necessary in creating success, which has formed the direction of this research. This thesis is focused on documenting a case study of the Brock Commons project, an 18 storey, hybrid timber-concrete residential high-rise located at the University of British Columbia, Vancouver campus, which is the tallest hybrid timber building in the world. The overall research objective was to identify and document the delivery of this innovative project, with a specific emphasis on the innovations necessary to make timber high-rise construction successful and the use of VDC tools in the design and pre-construction process. The case study documents the project context, the design process, the business and industry drivers, and the motivation for construction. Moreover, it investigates the motivations for all stakeholders, identifies the challenges and constraints, and captures the innovative solutions that were utilized to ensure project success. The case study also documents the innovative use of VDC to support prefabrication and overall project coordination. Specifically, it investigates the role of the VDC integrators in the project, the paths of communications with the different project team members, and the inputs and outputs of each phase of design and construction. This research identified lessons learned that can be applied to other construction projects where timber is the main structural component and a heavy use of VDC and pre-fabrication is required. Use of timber and innovative methods in construction have been consistently rising in the past decade, and this research aims to provide a starting point for future efforts in mass timber high-rise construction.
Online Access
Free
Resource Link
Less detail

Investigating the Performance of the Construction Process of an 18-storey Mass Timber Hybrid Building

https://research.thinkwood.com/en/permalink/catalogue1269
Year of Publication
2017
Topic
General Information
Market and Adoption
Material
CLT (Cross-Laminated Timber)
Application
Hybrid Building Systems
Wood Building Systems
Author
Kasbar, Mohamed
Organization
University of British Columbia
Year of Publication
2017
Country of Publication
Canada
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Application
Hybrid Building Systems
Wood Building Systems
Topic
General Information
Market and Adoption
Keywords
Brock Commons
Construction
Efficiency of Construction
Language
English
Research Status
Complete
Summary
The use of mass timber in high rise construction is an innovation. Mass timber construction has influential benefits including a lower overall construction time, a lower environmental impact, the use of renewable resource and an improved aesthetics. Despite the mentioned benefits, mass timber is not the traditional material for low to mid-rise commercial, institutional and residential construction in Canada. This is partially due to the need to explore the efficiency of mass timber construction relative to traditional construction. Detailed quantitative documentation of successful construction projects assists organisations planning mass timber high-rise projects by understanding and quantifying the advantages to ensure the viability of the construction process. This research project aims to understand the performance of mass-timber construction in the context of a construction manager, particularly the time saved due to completion of structural and envelope systems early. The case study chosen for this thesis is the tallest mass timber hybrid building in the world: Tallwood House. The research team studied the project in a macro-level perspective to investigate the building elements as single entities. Moreover, a micro-level study focuses on the performance of every level of the following elements: mass timber structure, envelope cladding systems and cross-laminated timber drywall encapsulation. The macro-level study investigates: (1) The production rate of the various building elements, (2) The coordination between structural trades to build a heavily pre-fabricated building using a single crane, and (3) The labor efforts per discipline. Moreover, the micro-level study investigates: (4) The variability of productivity of all levels, (5) A statistical investigation of three factors on cross-laminated timber installation, (6) Schedule reliability of preliminary planned schedule relative to the construction schedule (actual progress), (7) Earned value analysis, and (8) Planned percent complete to study the reliability of weekly work plans relative to construction schedules. All metrics were validated by the senior project manager through a discussion and confirmation of the inputs, findings and conclusions drawn. The claimed contribution of this research is an advanced state of knowledge about mass timber by exploring the efficiency of the construction process.
Online Access
Free
Resource Link
Less detail

Evaluating the Use of Drones for Timber Bridge Inspection

https://research.thinkwood.com/en/permalink/catalogue1835
Year of Publication
2018
Topic
General Information

Timber-Concrete-Composite Slabs – Research for Optimisation

https://research.thinkwood.com/en/permalink/catalogue1766
Year of Publication
2016
Topic
General Information
Material
Timber-Concrete Composite
Author
Hein, Carsten
Kaluzni, Lisa
Twohig, Brian
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Timber-Concrete Composite
Topic
General Information
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 5217-5225
Summary
Timber is an outstanding structural material with a very small carbon footprint and its strength/weight ratio is better than other conventional materials making it ideal for pre-fabrication. Considering not only structural performance but also acoustics, building physics, fire, façade engineering and sustainability were the reason engineers at Arup decided to combine wood with other materials which...
Online Access
Free
Resource Link
Less detail

Production and Technology of Cross Laminated Timber (CLT): A State-of-the-Art Report

https://research.thinkwood.com/en/permalink/catalogue263
Year of Publication
2013
Topic
General Information
Material
CLT (Cross-Laminated Timber)
Author
Brandner, Reinhard
Year of Publication
2013
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
General Information
Keywords
Production
Technology
Language
English
Conference
European Conference on Cross Laminated Timber (CLT)
Research Status
Complete
Notes
May 21-22, 2013, Graz, Austria
Summary
Cross laminated timber (CLT) has been developed to a worldwide well-known and versatile useable building material. Currently increasing rates in production volume and distribution can be observed. In fact CLT, thanks to its laminar structure making it well suited for use in construction, provides new horizons in timber engineering, in areas which had until now been the realm of mineral building materials like concrete and masonry. After a short introduction, this paper aims to demonstrate current production processes used for rigid CLT. In section 2 the process steps are described and essential requirements, as well as pros and cons of various production techniques, are discussed. Latest results of R & D and of development and innovation in production technology are presented. In section 3 test and monitoring procedures in the area of the internal quality assurance, known as factory production control (FPC), are presented. Diverse regulations, in the form of technical approvals for CLT as well as in the CLT product standard prEN 16351 [1], are discussed. Additionally, some technological aspects of the product, CLT, together with a comparison of geometrical and production relevant parameters of current technical approvals in Europe are provided in section 4. In the final and main part of the paper, production and technology is presented in a condensed way. The outlook for current and future developments, as well as the ongoing establishment of the solid construction technique with CLT, is given. The product, CLT, comprises an enormous potential for timber engineering as well as for society as a whole. Standardisation and further innovation in production, prefabrication, joining technique, building physics and building construction make it possible for timber engineering to achieve worldwide success.
Online Access
Free
Resource Link
Less detail

Modeling of Orthotropic Plates out of Cross Laminated Timber in the Mid and High Frequency Range

https://research.thinkwood.com/en/permalink/catalogue1352
Year of Publication
2017
Topic
General Information
Material
CLT (Cross-Laminated Timber)
Author
Winter, Christoph
Buchschmid, Martin
Müller, Gerhard
Publisher
ScienceDirect
Year of Publication
2017
Country of Publication
Netherlands
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
General Information
Keywords
Finite Element Model
Statistical Energy Analysis
Frequency
Orthrotropic Plates
Language
English
Research Status
Complete
Series
Procedia Engineering
Summary
Within the context of efficient and sustainable design of buildings a trend towards lightweight structures, e.g. timber structures, is recognizable. This trend implies the necessity of being able to predict serviceability and comfort as well as sound transmission in order to fulfill vibroacoustic requirements. To generate reliable prediction methods, the transfer of energy between building components has to be investigated. Therefore, a detailed understanding of the modeling of the building components, e.g. walls or ceilings, is compulsory. In the low frequency range the Finite Element Method (FEM) is a convenient tool to predict the vibroacoustic behavior. However, without appropriate post-processing it is limited due to the sensitivity of the results at higher frequencies. In the mid-frequency range a sufficient number of modes per band enables the use of statistical methods like the Statistical Energy Analysis (SEA). It delivers averaged results and thus copes with the sensitivity. As both techniques have a restricted validity regarding the frequency range, averaging techniques of the SEA are applied in the post-processing of the FEM to obtain an adapted hybrid approach, the Energy Flow Analysis. This contribution will focus on the Finite Element Model of the building components out of cross laminated timber modeled as orthotropic plates. The Young’s modulus of wood is perpendicular to the fiber comparatively low, which leads to low velocities of longitudinal and shear waves. Hence, at high frequencies thickness-stretch and thickness-shear modes play an important role. These can be activated already at low frequencies within the stiffness controlled region of their amplification function. Hence, their non-resonant contribution can be identified evaluating the potential energy compared to the kinetic one. This phenomenon is verified with the help of solid elements - in comparison with shell elements - by varying the points of excitation across the thickness. Moreover, the dimensions will be modified as well as the junction by inserting an elastic layer. Whereas the SEA is typically not able to represent through-thickness effects of plate-like structures, the energy flow between a wall and a ceiling will be investigated using the hybrid approach.
Online Access
Free
Resource Link
Less detail

A Scheduling Model for Industrial Process Management: An Innovative Application of Cross-Laminated Timber (CLT) Manufacturing

https://research.thinkwood.com/en/permalink/catalogue2109
Year of Publication
2019
Topic
General Information
Material
CLT (Cross-Laminated Timber)
Author
de Araujo Carneiro, Bruno
Organization
University of British Columbia
Year of Publication
2019
Country of Publication
Canada
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Topic
General Information
Keywords
Production
Model
Language
English
Research Status
Complete
Online Access
Free
Resource Link
Less detail

Options for the Resource Optimised Production of Laminar Load Carrying Members Based on Wood Products

https://research.thinkwood.com/en/permalink/catalogue1559
Year of Publication
2016
Topic
General Information
Material
CLT (Cross-Laminated Timber)
Author
Silly, Gregor
Thiel, Alexandra
Augustin, Manfred
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
General Information
Keywords
Production
Load Carrying
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 1352-1357
Summary
In this contribution proposals for the resource optimised production of laminar, load carrying timber elements are shown. Therefore also analogies to the ship and aircraft/aerospace engineering as well as to the furniture industry have been considered.
Online Access
Free
Resource Link
Less detail

10 records – page 1 of 1.