Modularna jednostka mieszkaniowa w technologii tradycyjnej drewnianej

BUILDER ◽  
2020 ◽  
Vol 275 (6) ◽  
pp. 38-39
Author(s):  
Tomasz Orłowski ◽  
Kinga Palus
Keyword(s):  
Cross Laminated Timber ◽  
Softwood Lumber ◽  
Laminated Veneer Lumber ◽  
Parallel Strand Lumber ◽  
The City

W artykule przedstawiono zagadnienia związane z możliwością realizacji obiektów wysokościowych z wykorzystaniem elementów drewna prasowanego typu Glulam, PSL (Parallel Strand Lumber), LVL (Laminated Veneer Lumber) i CLT (Cross Laminated Timber), zgodnie z wytycznymi konkursu Timber in the City, w ujęciu projektowania koncepcyjnego. Artykuł skupia się na autorskiej metodzie koncepcji projektowej, której główne założenie stanowi zaprojektowanie budynku mieszkalnego zlokalizowanego w Nowym Jorku (dzielnica Queens), o autorskiej technologii modularnej inspirowanej ciesielskimi złączami japońskimi. Binational Softwood Lumber Council – nonprofit (organizator konkursu) promuje nowatorskie postrzeganie produkcji, recykling i ochronę drzewostanu.

An exploratory study of composite cross-laminated timber (CCLT) made from bamboo and hemlock-fir mix

BioResources ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 2160-2170
Author(s):  
Peixing Wei ◽  
Brad Jianhe Wang ◽  
Libin Wang ◽  
Yongqi Wang ◽  
Guangrong Yang ◽  
...  
Keyword(s):  
Exploratory Study ◽  
Mechanical Performance ◽  
Western Hemlock ◽  
Bond Quality ◽  
Full Size ◽  
Cross Laminated Timber ◽  
Block Shear ◽  
Optimization Of Process Parameters ◽  
Dimension Lumber ◽  
Parallel Strand Lumber

This work investigated the feasibility of manufacturing composite cross-laminated timber (CCLT) from bamboo and a western hemlock and amabilis fir mix (hem-fir). Bamboo parallel strand lumber (bamboo PSL) was first fabricated as the surface laminae of CCLT. No. 2 and Btr 2×6 western hem-fir dimension lumber was imported from British Columbia (BC), Canada. The lumber was then sorted and further dried to form the inner laminae of CCLT. Multiple 800 × 800-mm CLT billets were fabricated using a commercial single-component polyurethane (PUR) adhesive. Block shear and delamination tests were conducted to examine the bond quality and durability of bamboo-wood CCLT. The results demonstrated that it is technically feasible to manufacture bamboo-wood CCLT with acceptable bond quality (shear strength, wood failure percentage, etc.) and delamination. Further studies should focus on the optimization of process parameters for manufacturing and surface treatment to improve the bond quality and durability and quantify the mechanical performance of bamboo-wood CCLT with a full-size production trial.

scholarly journals Comparing Performance of Cross-Laminated Timber and Reinforced Concrete Walls

2021 ◽  
Vol 26 (3) ◽  
pp. 28-43
Author(s):  
A. Bahrami ◽  
O. Nexén ◽  
J. Jonsson
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Cost Effective ◽  
Concrete Walls ◽  
Cross Laminated Timber ◽  
Analysis And Design ◽  
Lower Weight ◽  
Reinforced Concrete Walls ◽  
Design Software ◽  
The City

Abstract The purpose of this research is to specify the differences between the performance of cross-laminated timber (CLT) and reinforced concrete (RC) walls. The study is done by using the finite element structural analysis and design software, StruSoft FEM-Design, in order to model, analyse and design a reference building located in the city of Gävle in Sweden. The building is firstly modelled, analysed and designed using RC walls and then the RC walls are replaced with CLT walls. In both buildings, other load-bearing elements such as slabs, beams and columns are made of RC while the roof beams are made of glulam. It is found that employing RC has advantages, especially regarding thickness. The results show that the CLT walls require larger dimensions than their RC counterparts. Meanwhile, it is demonstrated that the slabs, beams and columns made of RC in the building having the CLT walls require more reinforcement or larger thickness than the case of walls made of RC. Moreover, the total weight of the building having the CLT walls is 74% of the building having the RC walls. The lower weight of the building having the CLT walls has great advantages such as having lighter foundation and being cost-effective and also beneficial for the environment.

scholarly journals Mass Timber Design Research at the Nexus of Practice and the Academy

2015 ◽  
Author(s):  
Todd Beyreuther ◽  
◽  
Darren Griechen ◽  
Keyword(s):  
Design Research ◽  
Parametric Design ◽  
Wood Products ◽  
Renewable Materials ◽  
Architectural Practice ◽  
Laminated Veneer Lumber ◽  
Glued Laminated Timber ◽  
Assembly Technology ◽  
Parallel Strand Lumber ◽  
Mass Timber

Mass timber is an emergent building assembly technology that advances themes of prefabrication, modularization, parametric design, and renewable materials in architectural practice and education. Mass timber is a collective term for several engineered heavy panel wood products including cross-laminated timber (CLT), nail-laminated timber (NLT), glued laminated timber (GLT) laminated veneer lumber (LVL), laminated strand lumber (LSL), and parallel strand lumber (PSL).

Recycleshell: Wood-only Shell Structures Made From Cross-Laminated Timber (CLT) Production Waste

2020 ◽  
Vol 61 (2) ◽  
pp. 125-139
Author(s):  
Christopher Robeller ◽  
Niklas Von Haaren
Keyword(s):  
Load Test ◽  
Shell Structures ◽  
Production Lines ◽  
Cross Laminated Timber ◽  
Laminated Veneer Lumber ◽  
Detailed Structural Analysis ◽  
Efficient Planning ◽  
New Construction ◽  
First Time

The article describes a new construction system for shell structures made from door- and window cut-offs resulting from cross laminated timber (CLT) production lines. For the first time, form-fitting fasteners made of beech laminated veneer lumber are used in a shell made of engineered wood plates, enabling a particularly simple, fast and precise construction. The efficient planning and production of a multitude of differently shaped elements is made possible by a CAD plug-in developed by the authors. The article presents the general application possibilities and limitations of the system, as well as the case study of a shell demonstrator with a span of 12 meters, built from 229 hexagonal plates. A detailed structural analysis is presented for the demonstrator, including an experimental load test to confirm the FEM results.

LIFE CYCLE ENERGY AND ENVIRONMENTAL IMPACTS OF CROSS LAMINATED TIMBER MADE WITH COASTAL DOUGLAS-FIR

2019 ◽  
Vol 14 (4) ◽  
pp. 17-33 ◽  
Author(s):  
Maureen Puettmann ◽  
Arijit Sinha ◽  
Indroneil Ganguly
Keyword(s):  
Life Cycle ◽  
Pacific Northwest ◽  
Primary Energy ◽  
Wood Products ◽  
Primary Data ◽  
Cross Laminated Timber ◽  
Softwood Lumber ◽  
Production Processes ◽  
Biogenic Carbon ◽  
Climatic Impacts

In this study, a cradle-to-gate life-cycle assessment (LCA) of Oregon-made cross-laminated timber (CLT) was conducted as per the ISO guidelines. Primary data pertaining to CLT manufacturing was collected from a production facility in Oregon and modeled with existing LCA data of Pacific Northwest softwood lumber production and harvesting operations. Primary energy is reported and encompasses all processes within the system boundary. Carbon emissions are reported and include fossil-based emissions from transportation and all production processes and carbon storage in CLT. LCA results are presented for five impact categories, primary energy consumption, and net carbon impact of CLT. Results show the environmental advantage of CLT due to storing of large amounts of biogenic carbon in a building structure for a lifetime. The amount of carbon stored in CLT offsets the emissions released from all production processes; this indicates that CLT is a net negative carbon emitter, as more carbon is stored in the product than is emitted to produce the product. This study shows the importance of using the LCA methodology for showing the net amount and type of energy used for production and the potential climatic impacts of using wood products. This LCA study makes no comparative assertions.

Einsatzmöglichkeiten von Holzwerkstoffen im Bauwesen | Possibilities of the use of wood-based materials in construction

2003 ◽  
Vol 154 (12) ◽  
pp. 472-479
Author(s):  
Peter Niemz
Keyword(s):  
Solid Wood ◽  
Wood Products ◽  
New Developments ◽  
Laminated Veneer Lumber ◽  
General Overview ◽  
Thermally Processed ◽  
Engineered Wood Products ◽  
Engineered Wood ◽  
Fibre Products ◽  
Parallel Strand Lumber

Wood-based materials and wood products are becoming increasingly important in construction. Engineered wood products, especially, are being used as a substitute for solid wood. The use of thermally processed solid wood is also increasing. Following a general overview of materials (materials based on solid wood, or laminated, veneer and fibre products)we describe their composition and most important characteristics. Emphasis is given to new developments as, for example, laminated strand lumber (LSL), laminated veneer lumber (LVL) and parallel strand lumber (parallam). We conclude with an overview of the possibilities for the use of woodbased materials in construction.

Hospitals: N.Y. Appellate Court Denies Move to Privatize Public Hospital

1999 ◽  
Vol 27 (2) ◽  
pp. 202-203
Author(s):  
Robert Chatham
Keyword(s):  
New York ◽  
New York City ◽  
York City ◽  
Public Health System ◽  
Municipal Hospital ◽  
The Public ◽  
Public Benefit ◽  
For Profit ◽  
Benefit Corporation ◽  
The City

The Court of Appeals of New York held, in Council of the City of New York u. Giuliani, slip op. 02634, 1999 WL 179257 (N.Y. Mar. 30, 1999), that New York City may not privatize a public city hospital without state statutory authorization. The court found invalid a sublease of a municipal hospital operated by a public benefit corporation to a private, for-profit entity. The court reasoned that the controlling statute prescribed the operation of a municipal hospital as a government function that must be fulfilled by the public benefit corporation as long as it exists, and nothing short of legislative action could put an end to the corporation's existence.In 1969, the New York State legislature enacted the Health and Hospitals Corporation Act (HHCA), establishing the New York City Health and Hospitals Corporation (HHC) as an attempt to improve the New York City public health system. Thirty years later, on a renewed perception that the public health system was once again lacking, the city administration approved a sublease of Coney Island Hospital from HHC to PHS New York, Inc. (PHS), a private, for-profit entity.

ASHA Convention 2013

ASHA Leader ◽  
2013 ◽  
Vol 18 (7) ◽  
pp. 46-48
Keyword(s):  
Ice Cream ◽  
Annual Convention ◽  
The City ◽  
Rich History

This year's Annual Convention features some sweet new twists like ice cream and free wi-fi. But it also draws on a rich history as it returns to Chicago, the city where the association's seeds were planted way back in 1930. Read on through our special convention section for a full flavor of can't-miss events, helpful tips, and speakers who remind why you do what you do.

App it Up in the City of Stars

ASHA Leader ◽  
2017 ◽  
Vol 22 (7) ◽  
Author(s):  
Sean Sweeney
Keyword(s):  
The City
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