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22 records – page 1 of 3.

U.S. Mass Timber Construction Manual

https://research.thinkwood.com/en/permalink/catalogue2873
Year of Publication
2021
Topic
General Information
Site Construction Management
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
NLT (Nail-Laminated Timber)
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Organization
WoodWorks
Year of Publication
2021
Format
Book/Guide
Material
CLT (Cross-Laminated Timber)
DLT (Dowel Laminated Timber)
NLT (Nail-Laminated Timber)
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Topic
General Information
Site Construction Management
Keywords
Preconstruction
Moisture Control
Installation
Close-out
Research Status
Complete
Summary
The U.S. Mass Timber Construction Manual was developed to give contractors and installers a framework for the planning, procurement, and management of mass timber projects, and to provide a bridge from their experience with other systems. Mass timber is unique in that it draws installation techniques from other construction types, so people with concrete, precast, tilt-up, and structural steel experience can readily adapt to these materials. However, understanding how mass timber differs from other building systems is key to cost effectiveness. The manual was produced with primary funding from the U.S. Endowment for Forestry and Rural Communities, in collaboration with WoodWorks’ mass timber manufacturing partners in the U.S. and Canada. While intended primarily for GCs and installers, it is a useful reference for all members of a mass timber project team and anyone interested in the construction of mass timber buildings.
Online Access
Free
Resource Link
Less detail

Wetting and Drying Performance of Cross-Laminated Timber Related to On-Site Moisture Protections: Field Measurements and Hygrothermal Simulations

https://research.thinkwood.com/en/permalink/catalogue2711
Year of Publication
2020
Topic
Moisture
Site Construction Management
Material
CLT (Cross-Laminated Timber)
Author
Wang, Lin
Wang, Jieying
Ge, Hua
Organization
Concordia University
FPInnovations
Publisher
EDP Sciences
Year of Publication
2020
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Moisture
Site Construction Management
Keywords
Hygrothermal
Simulation
Hygrothermal Models
On-site Wetting
Conference
Nordic Symposium on Building Physics
Research Status
Complete
Summary
Cross-laminated timber (CLT) panels are increasingly used in mid-rise buildings or even taller structures in North America. However, prolonged exposure to moisture during construction and in service is a durability concern for most wood products including CLT. To investigate practical solutions for reducing on-site wetting of mass timber construction, CLT specimens with a range of moisture protection measures, in six groups were tested in the backyard of FPInnovations’ Vancouver laboratory from Oct. 2017 to Jan. 2018. This study investigates the wetting and drying behaviours of the tested CLT specimens through 2-D hygrothermal simulations. The simulations are performed for base specimens (no protection measures) of group 1 (without joint or plywood spline) and group 2 (with a butt joint and plywood spline). For group 1, three data sources of material properties are used to create the models, and the data that led to the best agreement between simulations and measurement are used for creating the models of group 2. For group 2, two types of hygrothermal models are created with or without considering the differences in water absorption between the transverse and the longitudinal grain orientations. In addition, rain penetration is taken into account for the joint area. It is found that the model with considering the differences between transverse and longitudinal grain orientations shows a better agreement than that without considering such differences.
Online Access
Free
Resource Link
Less detail

Decision-Making for Cross-Laminated Timber Modular Construction Logistics Using Discrete-Event Simulation

https://research.thinkwood.com/en/permalink/catalogue2722
Year of Publication
2020
Topic
Site Construction Management
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Abiri, Bahar
Publisher
Oregon State University
Year of Publication
2020
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Site Construction Management
Keywords
Modular Construction
Discrete-Event Simulation
Research Status
Complete
Summary
The two primary considerations for construction project management are budget and time management. Modular construction has the potential to improve construction productivity by minimizing time and costs while improving safety and quality. Cross-Laminated Timber (CLT) panels are beneficial for modular construction due to the high level of prefabrication, adequate dimensional stability, and good mechanical performance that they provide. Accordingly, CLT modular construction can be a feasible way to speed up the construction and provide affordable housing. However, an in-depth study is needed to streamline the logistics of CLT modular construction supply chain management. CLT modular construction can be performed by two primary means based on type of modules produced: panelized (2D) and volumetric (3D). This research aims to help the Architecture, Engineering, and Construction (AEC) industry by developing a tool to assess the impact of various logistical factors on both panelized and volumetric modular construction productivity. Discrete-Event Simulation (DES) models were developed for panelized and volumetric CLT modular construction based on a hypothetical case study and using data collected from superintendents and project managers. Sensitivity analysis is conducted using the developed models to explore the impact of selected manufacturing and logistical parameters on overall construction efficiency. Comparing volumetric and panelized simulations with the same number of off-site crews revealed that the volumetric model has lower on-site process duration while the off-site process is significantly longer. Accordingly, from manufacturing to the final module assembly, the total time for the volumetric model is longer than panelized model. Moreover, the simulations showed that volumetric modular construction is associated with less personnel cost since the main process is performed off-site, which has lower labor costs and a smaller number of crews required on-site. This framework could be used to identify the optimum construction process for reducing the time and cost of the project and aid in decision-making regarding the scale of modularity to be employed for project.
Online Access
Free
Resource Link
Less detail

Towards digital automation flexibility in large-scale timber construction: integrative robotic prefabrication and co-design of the BUGA Wood Pavilion

https://research.thinkwood.com/en/permalink/catalogue2862
Year of Publication
2020
Topic
Design and Systems
Site Construction Management
Material
LVL (Laminated Veneer Lumber)
Application
Shell Structures
Author
Wagner, Hans Jakob
Alvarez, Martin
Groenewolt, Abel
Menges, Achim
Organization
University of Stuttgart
Publisher
Springer
Year of Publication
2020
Format
Journal Article
Material
LVL (Laminated Veneer Lumber)
Application
Shell Structures
Topic
Design and Systems
Site Construction Management
Keywords
Robotic Timber Construction
Computational Design
Construction Automation
Robotic Construction Management
Research Status
Complete
Series
Construction Robotics
Summary
This paper discusses the digital automation workflows and co-design methods that made possible the comprehensive robotic prefabrication of the BUGA Wood Pavilion—a large-scale production case study of robotic timber construction. Latest research in architectural robotics often focuses on the advancement of singular aspects of integrated digital fabrication and computational design techniques. Few researchers discuss how a multitude of different robotic processes can come together into seamless, collaborative robotic fabrication workflows and how a high level of interaction within larger teams of computational design and robotic fabrication experts can be achieved. It will be increasingly important to discuss suitable methods for the management of robotics and computational design in construction for the successful implementation of robotic fabrication systems in the context of the industry. We present here how a co-design approach enabled the organization of computational design decisions in reciprocal feedback with the fabrication planning, simulation and robotic code generation. We demonstrate how this approach can implement direct and curated reciprocal feedback between all planning domains—paving the way for fast-paced integrative project development. Furthermore, we discuss how the modularization of computational routines simplify the management and computational control of complex robotic construction efforts on a per-project basis and open the door for the flexible reutilization of developed digital technologies across projects and building systems.
Online Access
Free
Resource Link
Less detail

Solutions for Upper Mid-Rise and High-Rise Mass Timber Construction: Infrared Imaging for Fire Risks

https://research.thinkwood.com/en/permalink/catalogue2090
Year of Publication
2019
Topic
Fire
Site Construction Management
Application
Wood Building Systems

Productivity in Multi-storey Mass Timber Construction

https://research.thinkwood.com/en/permalink/catalogue2096
Year of Publication
2019
Topic
Site Construction Management
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems

Monitoring Moisture Performance of Cross-Laminated Timber Building Elements during Construction

https://research.thinkwood.com/en/permalink/catalogue2102
Year of Publication
2019
Topic
Site Construction Management
Moisture
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems

Moisture Monitoring Data of Mass Timber Elements During Prolonged Construction Exposure: The Case of the Forest Science Complex (Peavy Hall) at Oregon State University

https://research.thinkwood.com/en/permalink/catalogue2212
Year of Publication
2019
Topic
Moisture
Site Construction Management
Material
CLT (Cross-Laminated Timber)
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems

A Holistic Approach for Industrializing Timber Construction

https://research.thinkwood.com/en/permalink/catalogue2378
Year of Publication
2019
Topic
Site Construction Management
Design and Systems
Application
Wood Building Systems
Author
Santana-Sosa, Aída
Fadai, Alireza
Year of Publication
2019
Format
Conference Paper
Application
Wood Building Systems
Topic
Site Construction Management
Design and Systems
Keywords
Prefabrication
Off-site Construction
BIM
Mass Timber
Construction
Carbon
Conference
Sustainable Built Environment D-A-CH Conference
Research Status
Complete
Summary
Many strategies have been investigated seeking for efficiency in construction sector, since it has been pointed out as the largest consumer of raw materials worldwide and responsible of about 1/3 of the global CO2 emissions. While operational carbon has been strongly reduced due to building regulations, embodied carbon is becoming dominating. Resources and processes involved from material extraction to building erection should be carefully optimized aiming to reduce the emissions from the cradle to service. New advancements in timber engineering have shown the capabilities of this renewable and CO2 neutral material in multi-storey buildings. Since their erection is based on prefabrication, an accurate construction management is eased where variations and waste are sensible to be minimized. Through this paper, the factors constraining the use of wood as main material for multi-storey buildings will be explored and the potential benefits of using Lean Construction principles in the timber industry are highlighted aiming to achieve a standardized workflow from design to execution. Hence, a holistic approach towards industrialization is proposed from an integrated BIM model, through an optimized supply chain of off-site production, and to a precise aligned scheduled on-site assembly.
Online Access
Free
Resource Link
Less detail

Environmental Response of a CLT Floor Panel: Lessons for Moisture Management and Monitoring of Mass Timber Buildings

https://research.thinkwood.com/en/permalink/catalogue2161
Year of Publication
2018
Topic
Site Construction Management
Serviceability
Moisture
Material
CLT (Cross-Laminated Timber)
Application
Floors

22 records – page 1 of 3.