Skip header and navigation

Refine Results By

10 records – page 1 of 1.

Characterization and Quantification of VOC and Other Chemical Compounds in the Building: Impact on Occupant Health, Air Quality and the Environment

https://research.thinkwood.com/en/permalink/catalogue2264
Topic
Mechanical Properties
Organization
Université Laval
Country of Publication
Canada
Topic
Mechanical Properties
Keywords
Construction
Research Status
In Progress
Notes
Contact: Véronic Landry, Université Laval
Summary
Classifications of volatile products that may pose health and comfort risks to occupants tend to be restricted by current regulations. It seems important to sample air from concrete, wood and steel buildings to measure the compounds present. Ideally, measurements at different time intervals could be considered to qualify and quantify contaminant dispersion dynamics over time. The project aims to identify a possible advantage of wood construction in the face of air quality, to identify the main contaminants (quantity and toxicity) and to propose sampling and measurement techniques adapted to the building environment.
Less detail

Quality Control and Quality Assurance in Hybrid Mass Timber High-Rise Construction: A Case Study of the Brock Commons

https://research.thinkwood.com/en/permalink/catalogue1272
Year of Publication
2018
Topic
Site Construction Management
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
PSL (Parallel Strand Lumber)
Application
Hybrid Building Systems
Author
Calderon, Francisco
Organization
University of British Columbia
Year of Publication
2018
Country of Publication
Canada
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
PSL (Parallel Strand Lumber)
Application
Hybrid Building Systems
Topic
Site Construction Management
Keywords
Quality Control
Quality Assurance
Brock Commons
Reinforced Concrete
Concrete Core
Construction
Language
English
Research Status
Complete
Summary
Wood has seen a resurgence recently as a construction material driven by technological advances and a growing concern for the environment. Although an increasing amount of mass timber high-rises are being built all around the world, lack of information and outdated preconceptions are some of the obstacles that are keeping mass timber products from increasing their market share in high-rise construction. Academia and industry leaders must keep track of the progress that is being made and inform the general public as innovation and technological advances continue to take place. In this context, the University of British Columbia has recently completed the construction of the Brock Commons Tallwood House. This 18-story residence building employs two reinforced concrete cores and a mass timber structure composed of cross laminated timber panels, glued-laminated columns, and parallel strand lumber columns. With this, the building is currently the tallest wood building in the world and a testament to the suitability of engineered wood elements for high-rise construction. Aiming to address the lack of information surrounding mass timber high rise construction, this thesis documents the quality assurance (QA) and quality control (QC) practices that were put in place during the delivery of the building. The main objective of this research was to identify and present lessons learned from the application of these QA/QC practices. To do this, various QA/QC practices were identified and analyzed by reviewing the project specifications and other project documents, reviewing recognized industry standards, and interviewing various members of the project team. This study found a series of comprehensive and well-planned QA/QC practices that were put in place by the project team and that were appropriate to comply with the project requirements. This study concluded that most of these practices are replicable and advisable for future projects. The different QA/QC practices that were identified and the lessons learned from their application are presented in this thesis.
Online Access
Free
Resource Link
Less detail

Prefabricated CLT Facade Systems for Fast-Track Construction and Quality Assurance

https://research.thinkwood.com/en/permalink/catalogue1630
Year of Publication
2016
Topic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Walls
Wood Building Systems
Author
Gasparri, Eugenia
Giunta, Giorgio
Mazzucchelli, Enrico
Lucchini, Angelo
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Walls
Wood Building Systems
Topic
Design and Systems
Keywords
Off-site Prefabrication
Construction
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 2886-2894
Summary
Prefabrication of timber envelope components is a constantly developing research field, which attracts interest from various sectors of expertise thanks to the conspicuous advantages it can confer in terms of resources savings, as well as quality management and safety for all actors involved in the process. The present paper goes through the design of a newly conceived external wall system for tall CLT buildings, entirely preassembled off-site and so able to be installed on his final position via crane, renouncing to scaffolds for the façade completion. This not only allows for the construction phase to speed up but also for immediate protection of loadbearing timber elements from weather agents exposure. The work follows three main phases: the functional analysis and layer definition, component design through bi-dimensional study of joint operating mechanism and tri-dimensional validation of the system. Main author findings outline how success of prefabricated systems and their durability over service life is strongly dependent on the effectiveness of joint design.
Online Access
Free
Resource Link
Less detail

Implications of NCC 2016 Changes to Deemed-To-Satisfy (DTS) for Mid-Rise Timber Buildings on Supply of Sawn Softwood Timber

https://research.thinkwood.com/en/permalink/catalogue1926
Year of Publication
2017
Topic
Market and Adoption
Design and Systems
Material
Light Frame (Lumber+Panels)
Application
Wood Building Systems

Validation of Prediction Tools and Constructions – Grouping, Verification Measurements and Trend Analysis

https://research.thinkwood.com/en/permalink/catalogue841
Year of Publication
2017
Topic
Design and Systems
Connections
Acoustics and Vibration
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Timber-Concrete Composite
Application
Floors
Author
Homb, Anders
Guigou-Carter, Catherine
Hagberg, Klas
Späh, Moritz
Ferk, Heinz
Organization
Silent Timber Build
Year of Publication
2017
Country of Publication
Sweden
Format
Report
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Timber-Concrete Composite
Application
Floors
Topic
Design and Systems
Connections
Acoustics and Vibration
Keywords
Europe
Impact Sound Insulation
SEA
FEM
Language
English
Research Status
Complete
Summary
The report includes an overview of different floor assemblies used all over Europe. They have been selected and evaluated carefully and from that the floor assemblies are divided into different groups in order to fit to limit the number of possible setups. Hence the grouping is made in a manner that will facilitate modelling of floor assemblies using the different methods as developed within this project, Silent Timber Build. It can also be used in order to recommend different floor assemblies for different buildings and usage. The software that has been used and further developed within this project is a French software adapted to wooden building floor and wall components, “SEA Wood". In addition FEM software is used in order to improve and verify the results particularly in the low frequencies, which is of particular interest for structural solutions in wood.
Online Access
Free
Resource Link
Less detail

Mid-Rise Wood: Characterization of Hygrothermal Properties

https://research.thinkwood.com/en/permalink/catalogue49
Year of Publication
2014
Topic
Design and Systems
Moisture
Material
CLT (Cross-Laminated Timber)
Application
Walls
Author
Mukhopadhyaya, Phalguni
Bundalo-Perc, Sladana
van Reenen, David
Wang, Jasmine
Organization
National Research Council of Canada
Year of Publication
2014
Country of Publication
Canada
Format
Report
Material
CLT (Cross-Laminated Timber)
Application
Walls
Topic
Design and Systems
Moisture
Keywords
Envelope
Exterior Walls
Hygrothermal
Mid-Rise
Language
English
Research Status
Complete
Summary
To evaluate the building envelope performance of the generic exterior wall assemblies developed for use in mid-rise wood buildings, hygrothermal properties of materials used in the assemblies are needed as input data for hygrothermal modelling. Hygrothermal properties were developed for fire retardant treated plywood, regular gypsum sheathing, spray polyurethane foam and cross-laminated timber. This report documents results of the hygrothermal property determinations. The objective of this part of the research project was to generate a set of reliable and representative data on hygrothermal properties of a number of selected building materials as mentioned below. 1. D-Blaze Treated Plywood 2. Dricon Treated Plywood 3. Gypsum Sheathing 4. Closed Cell Spray Polyurethane Foam Insulation (Purple in Colour)
Online Access
Free
Resource Link
Less detail

Encapsulated Mass Timber Construction: Guidelines for Encapsulation Details and Techniques

https://research.thinkwood.com/en/permalink/catalogue2600
Year of Publication
2019
Topic
Design and Systems
Fire
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
NLT (Nail-Laminated Timber)
Application
Wood Building Systems
Author
Ranger, Lindsay
Geraghty, Simon
Jeske, Judy
Rahmani, Alma
Dorsey, Cheryl
Organization
FPInnovations
Year of Publication
2019
Country of Publication
Canada
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
Glulam (Glue-Laminated Timber)
NLT (Nail-Laminated Timber)
Application
Wood Building Systems
Topic
Design and Systems
Fire
Keywords
Encapsulated Mass Timber Construction
EMTC
Fire Protection
Construction Safety
Language
English
Research Status
Complete
Summary
The purpose of this guide is to provide an introduction to the concept of encapsulated mass timber construction. This guide provides an overview of encapsulation techniques for mass timber construction, and other related fire protection measures, and summarizes some approved encapsulation materials and application methods and identifies additional requirements for safety during construction. This guide is intended to help architects, engineers and designers by reducing uncertainty and allowing for more confidence in design, as well as providing authorities having jurisdiction and inspectors with a reference for simple design review.
Online Access
Free
Resource Link
Less detail

Mechanical Characterization of an Innovative Connection System for CLT Structures

https://research.thinkwood.com/en/permalink/catalogue1658
Year of Publication
2016
Topic
Connections
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Angeli, Albino
Polastri, Andrea
Callegari, Ernesto
Chiodega, Manuela
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Connections
Mechanical Properties
Keywords
Self-Tapping Screws
Monotonic Tests
X-RAD
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 3581-3590
Summary
This paper presents the numerical-experimental analysis of an innovative connector for CLT structures. The connection system, named X-RAD, has generated a new approach to CLT constructions, characterized by precision and effectiveness. Thanks to the possibility of assembling the X-RAD connectors directly within the factory, the CLT panels can be lifted during the production phases, transported to the construction site and assembled by the use of a sole element represented by the steel elements placed at the corners of the different panels. The X-RAD components in fact are meant to be pre-assembled in the factory by using all-threaded self-tapping screws, so that the system could act as a lifting point for the positioning operations. Several experimental tests are presented and analysed: tests on screws and monotonic tests on different load configurations. The test outcome lead to the mechanical characterization of the connector. X-RAD has been studied also with an analytical approach: the different load configurations have been solved “at limit” condition by the use of equilibrium. The experimental and analytical approach permitted to define respectively the experimental and the analytical capacity domains. Finally a method to verify X-RAD loaded by a generic external load is proposed.
Online Access
Free
Resource Link
Less detail

Structural Characterization of Multi-Storey Buildings with CLT Cores

https://research.thinkwood.com/en/permalink/catalogue496
Year of Publication
2014
Topic
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Shear Walls
Author
Polastri, Andrea
Pozza, Luca
Trutalli, Davide
Scotta, Roberto
Smith, Ian
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Shear Walls
Topic
Seismic
Keywords
Multi-Storey
Numerical model
Building Cores
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The behaviour of multi-storey buildings braced with Cross-Laminated-Timber (CLT) cores and additional shear walls is examined based on numerical analyses of various 3-dimensional configurations. Two ways of calibrating numerical model are proposed according to codes and experimental test data respectively, including calibration of parameters that characterise connections between CLT panels in building cores and shear walls. Results of analyses of entire buildings are presented in terms of principal elastic periods, and base shear and up-lift forces. Discussion addresses primary issues associated with behaviour of such systems and modelling them.
Online Access
Free
Resource Link
Less detail

Tall Wood Buildings and Indoor Air Quality

https://research.thinkwood.com/en/permalink/catalogue2291
Topic
Environmental Impact
Application
Wood Building Systems
Organization
TallWood Design Institute
Country of Publication
United States
Application
Wood Building Systems
Topic
Environmental Impact
Keywords
Health
Research Status
In Progress
Notes
Project contact is Kevin Van Den Wymelenberg
Summary
New research is showing that wood buildings are more likely to harbor environmental microbes with beneficial health effects. This pilot project will study various surface materials in both the lab setting and occupied mass timber buildings to assess effects on occupants’ health and comfort as well as indoor air quality.
Less detail

10 records – page 1 of 1.