Behaviour of tensile strength and displacement concerning Big Screw Joint with Cross Laminated Panel
|
|
- Scarlett Williams
- 5 years ago
- Views:
Transcription
1 Behaviour of tensile strength and displacement concerning Big Screw Joint with Cross Laminated Panel Keiichi Tsubouchi Graduate student Meiji University Kawasaki, Japan (Hideyuki Nasu, Hiroyuki Noguchi, Göran Forsberg, Anders Gustafsson and Carl-Johan Johansson) Summary The purpose of this research is to improve performance of the joints used in Big Frame construction system, see Fig.1 and Fig.2. If the Big Screw is embedded into parallel direction to wood fiber direction, the joint performance has very high rigidity and high strength, however, it seems to be brittle. On the other hand, if the screw is embedded into cross direction, joint doesn t have so high rigidity. However, it has very high ductility. If we adopt cross laminated panel to this joint system, the system might have a character of both high rigidity and high ductility. To prove the performance of the joints made with cross laminated panels, we have done tensile experiments. By the results of tensile experiments, we prove that if we use cross laminated panel for this joint, we get characteristic with high performance. Then, we got the possibility that can control both rigidity and ductility by combinations of lamina. 1. Introduction The ductility of timber structures is depending on their joints rigidity and strengths. Big Screw joint system is a system with high rigidity and strength. Big Screw joint system is made of steel parts as a connecter between timber pillars and beams. Special for this system is the screw that is installed in the pillars and beams, called Big Screw. Big Screw has a big diameter and its thread is wide and thin. No glue is used in this joint system, the timber at each joint have predrilled holes with the same shape as the screws. In this joint system tensile load transfers from the steel screw to the timber by the wide and thin threads. Big Frame is a timber moment resistant structure that uses Big Screw joint. The Big Screw joint is the most important part in Big Frame. If the performance of the joints can be improved, Big Frame system can be used for houses with bigger spans. Fig.1 Big Frame Construction System Fig.2 Big Screw joint system
2 From earlier studies we know following about Big Screw joints. If the Big Screw is used in parallel direction of the wood fiber direction, the behaviour of the joint has high rigidity, high strength but brittle failure, see Fig.3. On the other hand, if the Big Screw is used in cross direction, behaviour of the joint doesn t have so high rigidity but it has higher ductility, see Fig.4. Therefore, it seems that wood fiber direction have a high influence on the behaviour of the joint parts. From now on, we describe parallel as the direction when the fiber direction is parallel to Big Screw, cross when the fiber direction is orthogonal to Big Screw. 2 RP_P_37_ RP_P_37_36_1 RP_P_37_36_2 RP_P_37_36_3 RP_P_37_36_4 RP_P_37_36_5 RP_P_37_36_ Fig.3 Load displacement and behaviour of Big Screw parallel to fibre direction 2 RP_C_37_ RP_C_37_36_1 RP_C_37_36_2 RP_C_37_36_3 RP_C_37_36_4 RP_C_37_36_5 RP_C_37_36_ Fig.4 Load displacement and behaviour of Big Screw cross to fiber direction The hypothesis is that if the Big Screw is screwed into laminated wood that combined both parallel fiber direction and cross fiber direction, it can be possible to get joint parts that have both characteristic performance of parallel and cross, with high rigidity and high ductility. In this research we adopted Cross Laminated Panels as a material for new joint systems. Fig.5 Big Screw and the other parts Fig.6 Cross laminated panel
3 We thought that the wood fiber direction around Big Screw influence much to the joint behaviour and determined the Area ratio as a parameter of this research. The Area ratio is the ratio of the parallel and cross fibers area that is affected by sheer force. Fig.8 indicates the image of area. We defined Area ratio (Rp) as expression (1). Area ratio can be expressed by circumference ratio of parallel and cross fiber directions that have contact with the external diameter of the Big Screw. Fig.9 shows each circumference. Ap C p R p = = (1) AP + AC C P + CC It is important to find out the best Area ratio to achieve best balance of rigidity and ductility. To verify equation 1 we performed a series of tests with three different Types of spices. We also studied the way to get out more ductility using cross laminated panels. Fig.7 Parallel and Cross Lamina around Big Screw Fig.8 Area image Cc : Circumference that Cross Lamina contact with φ31 Cp : Circumference that Parallel Lamina contact with φ37 Fig.9 Circumference image 2. Experiment 2.1 Purpose The main purpose of this research is to gain knowledge about the performance of Big Screw used in cross laminated panel. For this purpose we carried out tensile experiments with Type A, see Fig.1. We anticipated that the joint need to have both parallel and cross fibers characteristic to receive best performance. The second purpose is to study a way to get more ductility by using cross laminated panel. We studied therefore a way to join each lamina section using test pieces Type B and Type C to avoid cracks that arise in our first tests. 2.2 Test pieces Fig.1 Research flow In order to obtain practical behaviour of the joints three different test pieces was used, Type A, B and C. There were three test pieces for each Type, totally 9 test pieces. The Area ratio of Type A was 64%, Type B and Type C the ratio was 34%. They were prepared considering not only by the balance of rigidity and ductility but also supply situation from factory. The dimensions of the timber cross sections is presented in Fig.12. The dimensional species of Type A was thickness width 21 length 12mm. Type B and C were thickness width 21 length 117mm. The wood pieces tested in Type A, were made of Red Pine, Pinus Resinosa, and was tested at Meiji University in Japan. The wood pieces tested in Type B and Type C were made of Norway spruce, Picea Abies, and was tested at SP Technical Research Institute of Sweden, SP Trätek, in Sweden. All test pieces were combined with parallel and cross direction s lamina alternately. All the holes in test pieces were predrilled in Japanese and Swedish factories before threading the Big Screw. The length of Big Screw is 36mm, the external diameter was 37 mm and core diameter is 31 mm. The pitch of the wings is 12 mm. The thickness of the wings is 2 mm. Type B and C were made of five layers cross laminated panel with the center board parallel to the Big Screw. To receive better ductility and prevent cracks Type C was reinforced with double small screws, see Fig.13 and Fig.14.
4 Rp = 64% Rp = 34% Rp = 34% A type B type C type Fig.11 Lamina combination drawing of each Type Fig.13 Small screw φ37 21 φ A type B type C type Fig.12 Dimensional drawing of each Type 2.3 Experimental method The experiment for Type A was performed in Japan. Type B and C were performed in Sweden, but the both experiments were performed in the similar method except loading speed (Fig.15). The loading speed of Type A in Japan was around.5 kn/second, Type B and C in Sweden were around 5 kn/second. Displacement gauges were fixed to the end of each wood piece directory. And these were measured relative displacement between the end of wood and the plate that is fixed on the Big Screw. Tensile load was measured by load cell that was fixed between Big Screw and the loading block. Load meter Fig.14 Position of small screw Loading block Displacement gauge Big Screwφ37 Joint device Test pieces Fig.15 Experimental set-up 2.4 Result of Experiment Fig.16, 17 and 18 show the behaviours of Type A, B and C. Graph.1, 2 and 3 show load displacement curves. Table.1 shows Maximum loads, Rigidities, Displacements (.8Pmax). Each value is average of three test pieces. Displacement (.8Pmax) is the displacement when the load came down until 8% of maximum load. Displacement (.8Pmax) is a value that is used for indicate ductility.
5 2 2 1 A-1 A-2 A-3 Fig.16 Behaviour of Type A Graph.1 Load displacement curve of Type A B-1 B-2 B-3 Fig.17 Behaviour of Type B Graph.2 Type B C-1 C-2 C-3 Fig.18 Behaviour of Type C Graph.3 Type C
6 Type A (Graph.1) is almost the same load displacement curve compared with parallel test pieces of earlier studies (Fig.3) until maximum load. The failure is not as brittle comparing with only using wood parallel to the Big Screw. So it seemed that cross lamina worked and the result was increased ductility. However, splits occurred to all Type A test pieces like Fig.16. The splits of all test pieces occurred in the thickness direction. It seems to be important to prevent these splits by cross direction lamina. To reinforce the section, we changed the combination of lamina positions to Type B. As for Type B, the splits in thickness direction like Type A didn t happen to Type B. So it seemed that two lines of cross direction laminas around Big Screw could hold effectively in width direction. However, another splits occurred in width direction, Fig 17. This result indicates the need to restrain in thickness direction. As a next step, we used small screws for Type C. Type C didn t have splits in both width and thickness directions, Fig.18. Displacement (.8Pmax) of Type C was 6.81 mm. The ductility was much better comparing with Type A and Type B. The small screws that were screwed in thickness direction seemed to be able to hold the section together without any cracks occurs. As a result, cross direction lamina could work with enough ductility. The rigidity of Type C was kn/mm. This was higher value and 1.13 times standard parallel test made by all parallel lamina test pieces, Area ratio %. The rigidity of Type B was kn/mm and.89 times lower than all parallel lamina test pieces. 3. Discussion Test pieces Name Maximum Rigidity (kn/mm) Displacement (.8Pmax) (mm) Type A Type B Type C Using wood parallel to Big Screw you will have a joint with high rigidity and high maximum load but a brittle failure. Using wood in right angel to the Big Screw you will have a joint with low rigidity and a lower maximum load but high ductility. Designing timber frame systems it is important to have a system with high rigidity but it is also important to have systems that have high ductility to avoid brittle failures. To control and anticipate the behaviour of the joints can be difficult. In these experiments, we knew fundamental behaviour and performance of Big Screw joint that adopts Cross Laminated Panel. The possibility that the joint has high rigidity and high ductility was confirmed. As a next stage of this research, we are going to get the performance about Big Frame column and beam joint frame system that reflects this research results. And we will study the influence of the Area ratio. Finally, Big Frame system can be used for even longer spans. 4. Conclusion Table.1 Test result of each Type. When Big Screw joint utilities adopts the material that combines parallel and cross fiber laminas, the joint could have the ideal performance from both parallel and cross direction. In this study, we had confirmed this by using Cross Laminated Panels. The performance of this joint is caused by the combination of parallel fiber and cross fiber direction laminas. This is influenced by Area ratio of fiber directions around Big Screw. Improving the effectiveness of cross fiber direction by reducing the risk of splitting the effectiveness of cross laminated panel is improved. Based on experimental test results following conclusions can be made -Using Big Screw in combination with wood fibers parallel and cross direction you can receive a joint with both high rigidity and ductility -Using Area ratio method for designing combinations of parallel and cross direction can be a reliable method. - Reinforcement with small screws is a good method for increase the capacity for five layer boards. - It is possible to control and anticipate the behaviour of the joints made of Big Screw using different combination of cross laminated boards.
7 5. References [1] Hideyuki NASU., Hiroki ISHIYAMA., Norihito YAMAMOTO., Mayuko TAKAOKA., Tatsuya MIYAKE., and Hiroyuki NOGUCHI., Shaking table test of full scale 3-story timber frame, AIJ JOURNAL OF STRUCTUAL AND CONSTRUCTION ENGINEERING, No. 617, July 27, pp [2] Hideyuki NASU., Hiroki ISHIYAMA., Norihito YAMAMOTO., Mayuko TAKAOKA., Tatsuya MIYAKE., and Hiroyuki NOGUCHI., DEVEROPMENT OF TIMBER FRAME STRUCTURES WITH THROUGH BEAM TYPE JOINT USING LARGE DIAMETER BOLTS, AIJ JOURNAL OF TECHNOLOGY AND DESIGIN, No.22, Dec. 25, pp [3] Hideyuki NASU., Hiroki ISHIYAMA., Tatsuya MIYAKE., Norihito YAMAMOTO., Mayuko TAKAOKA., and Hiroyuki NOGUCHI., Development of Timber Frame Structure Part 1 ~ Part 5, AIJ Summaries of Technical Papers of Annual Meeting 25 C-1 StructuresⅢ, September 25, pp [4] Hideyuki NASU., Hiroki ISHIYAMA., Tatsuya MIYAKE., Norihito YAMAMOTO., Mayuko TAKAOKA., and Hiroyuki NOGUCHI., Development of Timber Frame Structure Part 6 ~ Part 8 Shaking Table Test of Full Scale 3 story Timber Frame, AIJ Summaries of Technical Papers of Annual Meeting 26 C-1 StructuresⅢ, September 26, pp [5] Keiichi TSUBOUCHI., Hideyuki NASU., and Hiroyuki NOGUCHI., Experimental Study on Moment Joint Using Large Diameter Bolt with Double Screw and Cross Laminated Panel, AIJ Summaries of Technical Papers of Annual Meeting 27 C-1 StructuresⅢ, September 27, pp
Moment-Resisting Connections In Laminated Veneer Lumber (LVL) Frames
Moment-Resisting Connections In Laminated Veneer Lumber (LVL) Frames Andy van Houtte Product Engineer-LVL Nelson Pine Industries Nelson, NZ Andy Buchanan Professor of Civil Engineering Peter Moss Associate
More informationGlued laminated timber beams repair.
Glued laminated timber beams repair. Master s Degree Extended Abstract Ricardo Cardoso Henriques da Silva Keywords: glulam, delamination, self-tapping screw, plywood, repair November 2014 1. INTRODUCTION
More informationPull-compression tests on glued-in metric thread rods parallel to grain in different timber species and laminated veneer lumber
COST FP1004 15-17 April 2015 Lisbon, Portugal Pull-compression tests on glued-in metric thread rods parallel to grain in different timber species and laminated veneer lumber Frank Hunger 1, Mislav Stepinac
More informationDevelopment of Wooden Portal Frame Structures with Improved Columns
Development of Wooden Portal Frame Structures with Improved Columns by Dr. Masahiro Noguchi Post Doctoral Fellow Tokyo Institute of Technology, Yokohama, Kanagawa, Japan Prof. dr. Kohei Komatsu Professor
More informationInvestigations on the Effectiveness of Self-tapping Screws in Reinforcing Bolted Timber Connections
Investigations on the Effectiveness of Self-tapping Screws in Reinforcing Bolted Timber Connections Mohammad Mohammad Group Leader, Building Systems Forintek Canada Corp, Eastern Division Quebec, Canada
More informationDowel type joints Influence of moisture changes and dowel surface smoothness. Erik Serrano and Johan Sjödin, Växjö University, Sweden
Dowel type joints Influence of moisture changes and dowel surface smoothness Erik Serrano and Johan Sjödin, Växjö University, Sweden Background and introduction With the increased use of glulam in large-span
More informationPRO LIGNO Vol. 11 N pp
FINITE ELEMENT SIMULATION OF NAILED GLULAM TIMBER JOINTS Mats EKEVAD Luleå University of Technology Division of Wood Science and Engineering SE-931 87 Skellefteå, Sweden Tel: +46 910 585377; E-mail: mats.ekevad@ltu.se
More informationEffect of Vertical Load under Cyclic Lateral Load Test for Evaluating Sugi CLT Wall Panel
Effect of Vertical Load under Cyclic Lateral Load Test for Evaluating Sugi CLT Wall Panel Minoru OKABE 1, Motoi YASUMURA 2, Kenji KOBAYASHI 3, Takeshi HARAMIISHI 4, Yo NAKASHIMA 5, Kazuhiko FUJITA ABSTRACT:
More informationDowel connections in laminated strand lumber
Dowel connections in laminated strand lumber Cranswick, Chad J. 1, M c Gregor, Stuart I. 2 ABSTRACT Laminated strand lumber (LSL) is a relatively new structural composite lumber. As such, very limited
More informationTitle. CitationJournal of Wood Science, 58(4): Issue Date Doc URL. Rights. Type. File Information.
Title Effective lateral resistance of timber-plywood-timbe Author(s)Wanyama, Okumu Gordon; Sawata, Kei; Hirai, Takuro; K CitationJournal of Wood Science, 58(4): 315-321 Issue Date 2012-08 Doc URL http://hdl.handle.net/2115/50078
More informationTHE EFFECT OF THREAD GEOMETRY ON SCREW WITHDRAWAL STRENGTH
THE EFFECT OF THREAD GEOMETRY ON SCREW WITHDRAWAL STRENGTH Doug Gaunt New Zealand Forest Research Institute, Rotorua, New Zealand ABSTRACT Ultimate withdrawal values for a steel 16mm diameter screw type
More informationAnti-check bolts as means of repair for damaged split ring connections
Anti-check bolts as means of repair for damaged split ring connections Quenneville, J.H.P. 1 and Mohammad, M. 2 ABSTRACT There are numerous large span timber hangars dating back to the Second World War.
More informationModule 10 : Improvement of rock mass responses. Content
IMPROVEMENT OF ROCK MASS RESPONSES Content 10.1 INTRODUCTION 10.2 ROCK REINFORCEMENT Rock bolts, dowels and anchors 10.3 ROCK BOLTING MECHANICS Suspension theory Beam building theory Keying theory 10.4
More informationEVALUATION OF SCREWS USED IN LAMINATED VENEER LUMBER ROCKING CONNECTIONS
EVALUATION OF SCREWS USED IN LAMINATED VENEER LUMBER ROCKING CONNECTIONS D. M. Carradine, M. P. Newcombe and A. H. Buchanan Dept. of Civil and Natural Resources Engineering, University of Canterbury, Private
More informationComparison of behaviour of laterally loaded round and squared timber bolted joints
Focussed on Modelling in Mechanics Comparison of behaviour of laterally loaded round and squared timber bolted joints Antonín Lokaj, Kristýna Klajmonová VŠB echnical University of Ostrava, Faculty of Civil
More informationLawrence A. Soltis, M. and Robert J. Ross, M. 1
REPAIR OF WHITE OAK GLUED-LAMINATED BEAMS Lawrence A. Soltis, M. and Robert J. Ross, M. 1 Abstract Connections between steel side plates and white oak glued-laminated beams subjected to tension perpendicular-to-grain
More informationSTRUCTURAL TIMBER DESIGN
STRUCTURAL TIMBER DESIGN to Eurocode 5 2nd Edition Jack Porteous BSc, MSc, DIC, PhD, CEng, MIStructE, FICE Director lack Porteous Consultancy and Abdy Kernlani BSc, MSc, PhD, CEng, FIStructE, FIWSc Professor
More informationAmerican Institute of Timber Construction 7012 South Revere Parkway Suite 140 Centennial, CO Phone: 303/ Fax: 303/
American Institute of Timber Construction 7012 South Revere Parkway Suite 140 Centennial, CO 80112 Phone: 303/792-9559 Fax: 303/792-0669 404.1. SCOPE STANDARD FOR RADIALLY REINFORCING CURVED GLUED LAMINATED
More informationConnections in CLT Assemblies
Creating forest sector solutions www.fpinnovations.ca Connections in CLT Assemblies Cross Laminated Timber Symposium Vancouver, BC February 8-9, 2011 M. Mohammad Building Systems Wood Products Division
More informationSlip and yield resistance of friction type of high strength bolted connections with over-sized holes
IABSE-JSCE Joint Conference on Advances in Bridge Engineering-II, August 8-10, 2010, Dhaka, Bangladesh. ISBN: 978-984-33-1893-0 Amin, Okui, Bhuiyan (eds.) www.iabse-bd.org Slip and yield resistance of
More informationeb^sv=qfj_bo UNIVERSITY OF WISCONSIN - STOUT COLLEGE OF SCIENCE TECHNOLOGY ENGINEERING & MATHEMATICS Architectural Technology AEC 233
eb^sv=qfj_bo UNIVERSITY OF WISCONSIN - STOUT COLLEGE OF SCIENCE TECHNOLOGY ENGINEERING & MATHEMATICS Architectural Technology AEC 233 Dr. Jason E. Charalambides fkqolar`qflk Heavy timber construction consists
More informationPrediction of Reinforcement Effect by Screw on Triangular Embedment Perpendicular to the Grain with Variation of Screw Locations
Open Journal of Civil Engineering,,, 67-73 http://dx.doi.org/.436/ojce..3 Published Online September (http://www.scirp.org/journal/ojce) of Reinforcement Effect by Screw on Triangular Embedment Perpendicular
More informationSplitting strength of beams loaded perpendicular to grain by connections, a fracture mechanical approach
Splitting strength of beams loaded perpendicular to grain by connections, a fracture mechanical approach Ad Leijten Civil Eng. PhD, Senior Researcr University of Techn. Delft Delft, T Netrlands A.Leijten@citg.tudelft.nl
More informationSkewed connections result when members frame to each
Design of Skewed Connections LARRY KLOIBER and WILLIAM THORNTON ABSTRACT Skewed connections result when members frame to each other at an angle other than 90º. This paper provides some guidance in the
More informationDuctility of large-scale dowelled CLT connections under monotonic and cyclic loading
Ductility of large-scale dowelled CLT connections under monotonic and cyclic loading Lisa-Mareike Ottenhaus 1, Minghao Li 2, Tobias Smith 3 1. PhD candidate, Department of Civil and Natural Resources Engineering,
More informationa) If a bolt is over-tightened, which will fail first the bolt, or the plastic?
2.2.75 6.525 Problem Set 3: Solutions to ME problems Fall 2013 Jacob Bayless Problem 1: Bolted joint a) If a bolt is over-tightened, which will fail first the bolt, or the plastic? The bolt is made of
More informationSPECIAL PRODUCTS FOR EVERY CHALLENGE, A SOLUTION.
SPECIAL PRODUCTS FOR EVERY CHALLENGE, A SOLUTION. 01 TERRACE COMFORT PLANK A minimised deformation due to bonding Edge-grain minimises any warping, with hardly any fibre separation Homogeneous appearance
More informationSimplified analysis of timber rivet connections
Simplified analysis of timber rivet connections Stahl, Douglas C., 1 Begel, Marshall, 2 and Wolfe, Ronald W. 3 ABSTRACT Timber rivets, fasteners for glulam and heavy timber construction, have been used
More informationBolts and Set Screws Are they interchangeable?
1903191HA Bolts and Set Screws Are they interchangeable? Prof. Saman Fernando Centre for Sustainable Infrastructure SUT Introduction: This technical note discusses the definitions, standards and variations
More informationMechanical behavior of fiberglass reinforced timber joints
Mechanical behavior of fiberglass reinforced timber joints Chen, Chi-Jen 1 ABSTRACT The objective of this research is to investigate the mechanical performance of dowel-type timber joints reinforced by
More informationExperimental Evaluation of Metal Composite Multi Bolt Radial Joint on Laminate Level, under uni Axial Tensile Loading
RESEARCH ARTICLE OPEN ACCESS Experimental Evaluation of Metal Composite Multi Bolt Radial Joint on Laminate Level, under uni Axial Tensile Loading C Sharada Prabhakar *, P Rameshbabu** *Scientist, Advanced
More informationDowel-type fasteners. Timber Connections. Academic resources. Introduction. Deferent types of dowel-type fasteners. Version 1
Academic resources Timber Connections Dowel-type fasteners Version 1 This unit covers the following topics: Deferent types of dowel-type fasteners Introduction There are four criteria designers should
More informationCast-in Ferrule Connections Load/Displacement Characteristics in Shear
Cast-in Ferrule Connections Load/Displacement Characteristics in Shear Ian Ferrier 1 and Andrew Barraclough 2 1 Product Manager - Connections, ITW Construction Systems ANZ. 2 Research and Development Manager,
More informationWithdrawal Strength of Staples
Holding Strength of Staples Staples are widely used in the furniture industry, both for upholstering purposes and for frame construction. The staples used for upholstering are usually rather small and
More informationWelded connections Welded connections are basically the same design in AISI as in AISC. Minor differences are present and outlined below.
Cold-Formed Steel Design for the Student E. CONNECTIONS AND JOINTS E1 General Provisions Connections shall be designed to transmit the maximum design forces acting on the connected members. Proper regard
More informationAvailable online at ScienceDirect. Procedia Engineering 114 (2015 )
Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 114 (2015 ) 240 247 1st International Conference on Structural Integrity Dowel type joints of round timber exposed to static
More informationKorean standards of visual grading and establishing allowable properties of softwood structural lumber
Korean standards of visual grading and establishing allowable properties of softwood structural lumber Park, Moon-Jae 1, Shim, Kug-Bo 1 ABSTRACT Korean standards related to wood products such as "Sizes
More informationNAILED MOMENT JOINTS IN TIMBER STRUCTURES. A.H. Bryant*, J.A. Gibson**, T.N. Mitchell***, S.J. Thurston****
223 NAILED MOMENT JOINTS IN TIMBER STRUCTURES A.H. Bryant*, J.A. Gibson**, T.N. Mitchell***, S.J. Thurston**** SYMOPSIS The development, design and testing of a nailed steel sideplate joint for the transfer
More informationUse of grooved clamping plate to increase strength of bolted moment connection on cold formed steel structures
IOP Conference Series: Materials Science and Engineering PAPER OPEN ACCESS Use of grooved clamping plate to increase strength of bolted moment connection on cold formed steel structures To cite this article:
More informationConnection Design Examples
Connection Design Examples Using the 2015 NDS (DES345) Lori Koch, P.E. Manager, Educational Outreach American Wood Council Adam Robertson, M.A.Sc., P.Eng. Manager, Codes and Standards Canadian Wood Council
More informationS T R U C T U R. Pushing the Boundaries of Timber Design. magazine
Pushing the Boundaries of Timber Design By Holger S. Schulze-Ehring, Dipl.-Ing., SIA, Filippo Masetti, P.E. and Matthew H. Johnson, P.E. The China Pavilion for Expo Milano 2015 Figure 1. Rendering of the
More informationThe predictive model for strength of inclined screws as shear connection in timber-concrete composite floor
The predictive model for strength of inclined screws as shear connection in timber-concrete composite floor F. Moshiri, C. Gerber, H.R. Valipour, R. Shrestha & K.I. Crews Centre for built infrastructure,
More informationTIMBER-CONCRETE COMPOSITE STRUCTURES WITH PREFABRICATED FRC SLAB
TIMBER-CONCRETE COMPOSITE STRUCTURES WITH PREFABRICATED FRC SLAB Roberto Crocetti 1, Tiziano Sartori 2, Mathias Flansbjer 3 ABSTRACT: This study relates to the development of innovative composite structures,
More informationTension Perpendicular to Grain Strength of Wood, Laminated Veneer Lumber (LVL), and Cross-Banded LVL (LVL-C)
Tension Perpendicular to Grain Strength of Wood, Laminated Veneer Lumber (LVL), and Cross-Banded LVL (LVL-C) M. Ardalany PhD candidate, Department of Civil and Natural Resources Engineering, University
More information2002 ADDENDUM to the 1997 NDS and PRIOR EDITIONS
AMERICAN FOREST & PAPER ASSOCIATION American Wood Council Engineered and Traditional Wood Products March 2002 2002 ADDENDUM to the 1997 NDS and PRIOR EDITIONS The 2001 Edition of the National Design Specification
More informationExperimental investigation of the behaviour of pinned beam to column connections to pure shear monotonic and cyclic excitation
SAFECAST PERFORMANCE OF INNOVATIVE MECHANICAL CONNECTIONS IN PRECAST BUILDING STRUCTURES UNDER SEISMIC CONDITIONS Experimental investigation of the behaviour of pinned beam to column connections to pure
More informationSliding shear capacities of the Asymmetric Friction Connection
Sliding shear capacities of the Asymmetric Friction Connection S. Yeung, H. Zhou, H.H. Khoo & G.C. Clifton Department of Civil Engineering, University of Auckland, Auckland. G.A. MacRae University of Canterbury,
More informationPostprint.
http://www.diva-portal.org Postprint This is the accepted version of a paper published in Engineering structures. This paper has been peerreviewed but does not include the final publisher proof-corrections
More informationInstallation Instructions
Column & Beam Units with Debris Netting Installation Instructions Laminated Wood Systems, Inc. Seward, Nebraska 800-949-3526 2015 LWS, INC. AVR-NET INSTALL 05-12-16 AVR Installation Notes 1 Safety The
More informationSIMPLIFIED DESIGN PROCEDURE FOR GLUED-LAMINATED BRIDGE DECKS
ABSTRACT Procedures have recently been developed for the design of glued-laminated bridge decks and for steel dowel connectors. However, since most bridges are designed in accordance with the Specifications
More informationPERFORMANCE OF COMPOSITE SHEAR WALL PANEL OF LVL AND GRC BOARD
PERFORMANCE OF COMPOSITE SHEAR WALL PANEL OF LVL AND GRC BOARD Maryoko Hadi 1, Rudi Setiadji 2, Anita Firmanti 3, Bambang Subiyanto 4, Kohei Komatsu 5 ABSTRACT: The low-cost housing for the people is the
More informationConnection and performance of two-way CLT plates
Connection and performance of two-way CLT plates by Chao (Tom) Zhang George Lee Dr. Frank Lam Prepared for Forestry Innovation Investment 1130 W Pender St, Vancouver BC V6E 4A4 Timber Engineering and Applied
More informationWELDA FASTENING PLATES
FASTENING PLATES Author: Markus Junes, M. Sc. Civ. Eng. R&D Manager, Peikko Group 1. INTRODUCTION Peikko Group has launched a new family of Fastening Plate products with resistances calculated on the basis
More informationDesign of structural connections for precast concrete buildings
BE2008 Encontro Nacional Betão Estrutural 2008 Guimarães 5, 6, 7 de Novembro de 2008 Design of structural connections for precast concrete buildings Björn Engström 1 ABSTRACT A proper design of structural
More informationCOMPRESSION MOLDING OF PAPER USING TWISTED PAPER YARN AS REINFORCEMENT
16 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS COMPRESSION MOLDING OF PAPER USING Yamamoto H.*,Kimura T.*,Chikamori K.* *Kyoto institute of technology Keywords: Twisted paper yarn, Composite paper,
More informationTimber Rivet Connections Design Process for a Hanger Connection
Timber Rivet Connections Design Process for a Hanger Connection RobertJ.Taylor,PhD,P.Eng.,Assoc.AIAand DavidM.Moses,PhD,P.Eng.,P.E.,LEED AP Introduction Timber rivet connections have been used successfully
More informationIndex Terms: Lathe waste concrete; Shear and bending; Shear strength; Stirrups; Simply supported beams.
TASC- 15, 1-11 June 15 Effect of Lathe Waste in Concrete as Reinforcement Prof. Kumaran M 1,Nithi M. 2, Reshma, K. R. 3 Civil Engineering 1, Professor1, Universal Engineering College, Thrissur, Kerala,
More informationFire resistance tests on beam-to-column shear connections Pedro Palma, Andrea Frangi, Erich Hugi, Paulo Cachim and Helena Cruz
Research Collection Conference Paper Fire resistance tests on beam-to-column shear connections Pedro Palma, Andrea Frangi, Erich Hugi, Paulo Cachim and Helena Cruz Author(s): Frangi, Andrea; Palma, Pedro;
More informationKeywords: Bracing bracket connection, local deformation, selective pallet racks, shear stiffness, spine bracings.
Send Orders for Reprints to reprints@benthamscience.ae The Open Construction and Building Technology Journal, 2015, 9, 1-6 1 Open Access Investigation of Shear Stiffness of Spine Bracing Systems in Selective
More informationPryda Timber Connectors
Pryda Timber Connectors Pryda Lintel Guide Engineered Steel Wall Lintels March 2014 ESSENTIAL NOTES PRYDA PRODUCT GUIDES INTRODUCTION The information in this Product Guide is provided for use in Australia
More informationStructural Strength of Lapped Cold-Formed Steel Z-Shaped Purlin Connections with Vertical Slotted Holes
Missouri University of Science and Technology Scholars' Mine International Specialty Conference on Cold- Formed Steel Structures (2014) - 22nd International Specialty Conference on Cold-Formed Steel Structures
More informationSIMULATION AND EXPERIMENTAL WORK OF SINGLE LAP BOLTED JOINT TESTED IN BENDING
SIMULATION AND EXPERIMENTAL WORK OF SINGLE LAP BOLTED JOINT TESTED IN BENDING Aidy Ali *, Ting Wei Yao, Nuraini Abdul Aziz, Muhammad Yunin Hassan and Barkawi Sahari Received: Jun 13, 2007; Revised: Nov
More informationMoment Resisting Connections for Load Bearing Walls
PRECAST: MOMENT RESISTING CONNECTIONS Moment Resisting Connections for Load Bearing Walls Manish Khandelwal Sr. Structural Engineer, Building Structures, Sweco India Private Limited Design philosophy for
More informationSection COUPLINGS AND COUPLING ADAPTERS. This Section covers couplings and coupling adapters for ductile iron and steel pipe.
PART 1 GENERAL 1.01 SUMMARY Section 15155 This Section covers couplings and coupling adapters for ductile iron and steel pipe. 1.02 MEASUREMENT AND PAYMENT A. No separate payment for Work performed under
More informationEVALUATION OF THE STRUCTURAL BEHAVIOUR OF BEAM-BEAM CONNECTION SYSTEMS USING COMPRESSED WOOD DOWELS AND PLATES
EVALUATION OF THE STRUCTURAL BEHAVIOUR OF BEAM-BEAM CONNECTION SYSTEMS USING COMPRESSED WOOD DOWELS AND PLATES Sameer Mehra 1, Conan O Ceallaigh 1, Fatemeh Hamid - Lakzaeian 1, Zhongwei Guan 2, Adeayo
More informationBauBuche Fasteners and connections
BauBuche Fasteners and connections Beech laminated veneer lumber Chapter under revision 05 BauBuche Fasteners and connections 05 04-18 - EN Sheet 1 / 10 Fasteners and connections Sheet CONTENTS 2 3 4 9
More informationBolt Spacing and End Distance of Bolted Connection of Laminated Veneer Lumber (LVL) Sengon
Civil Engineering Dimension, Vol. 19, No. 1, March 2017, 1-6 ISSN 1410-9530 print / ISSN 1979-570X online DOI: 10.9744/CED.19.1.1-6 Bolt Spacing and End Distance of Bolted Connection of Laminated Veneer
More informationPOWDER-ACTUATED FASTENERS IN COLD-FORMED STEEL CONSTRUCTION
TECHNICAL NOTE On Cold-Formed Steel Construction $5.00 Light Gauge Steel Engineers Association Washington, D.C. Toll-Free: 1 (866) 465-4732 www.lgsea.com POWDER-ACTUATED FASTENERS IN COLD-FORMED STEEL
More informationVERSA-LAM. An Introduction to VERSA-LAM Products
44 VERSA-LAM An Introduction to VERSA-LAM Products VERSA-LAM is one of the strongest and stiffest engineered wood products approved in the UK. 241 302 356 406 VERSA-LAM products are excellent as floor
More informationSTRUCTURAL FINGER JOINTED SOLID TIMBER
STRUCTURAL FINGER JOINTED SOLID TIMBER THE BEAM WITH THE CHARACTER OF SOLID TIMBER. 01 AT A GLANCE AREAS OF APPLICATION Single and multiple family houses Multi-storey residential buildings Industrial and
More informationTIMBERS BEAMS & STRINGERS, POSTS & TIMBERS
TIMBERS BEAMS & STRINGERS, POSTS & TIMBERS -1 -2 TIMBERS ASPEN SPRUCE PINE FIR(s) EASTERN SPRUCE *RED MAPLE EASTERN HEMLOCK *MIXED MAPLE TAMARACK *BEECH BIRCH BALSAM FIR HICKORY NORTHERN WHITE CEDAR *MIXED
More informationEXAMPLE 1-4 EXAMPLE 1-5
EXAMPLE 1- Calculate the maximum shear stress τmax in a simply supported wood beam carrying a uniform load of (w=18 kn/m) if the length is 1.75 m and the cross section is rectangular with width 150 mm
More informationWorking with Wood and Wood Materials
Working with Wood and Wood Materials Excerpt from the Bosch Encyclopedia of Power Tools. Written & Published by ROBERT BOSCH GmbH and Robert Bosch Tool Corporation. The grain direction of the fibers determines
More informationnineteen Wood Construction 1 and design APPLIED ARCHITECTURAL STRUCTURES: DR. ANNE NICHOLS FALL 2016 lecture STRUCTURAL ANALYSIS AND SYSTEMS ARCH 631
APPLIED ARCHITECTURAL STRUCTURES: STRUCTURAL ANALYSIS AND SYSTEMS DR. ANNE NICHOLS FALL 2016 lecture nineteen wood construction and design Wood Construction 1 Timber Construction all-wood framing systems
More informationSCREWS WITH CONTINUOUS THREADS IN TIMBER CONNECTIONS
SCREWS WITH CONTINUOUS THREADS IN TIMBER CONNECTIONS Prof. Dr.-Ing. H. J. Blaß, Dipl.-Ing. I. Bejtka Universität Karlsruhe (TH), Germany Abstract Screws, bolts and dowels loaded perpendicular to the fastener
More informationLOAD CARRYING CAPACITY OF METAL DOWEL TYPE CONNECTIONS OF TIMBER STRUCTURES
Vol. 10, Issue /014, 51-60 DOI: 10.478/cee-014-0011 LOAD CARRYING CAPACITY OF METAL DOWEL TYPE CONNECTIONS OF TIMBER STRUCTURES Jozef GOCÁL 1,* 1 Department of Structures and Bridges, Faculty of Civil
More informationGLOSSARY OF TERMS SECTION 8
GLOSSARY OF TERMS SECTION 8 Anchor Bolt Angle Base Plate Bay Blocking CCB Centerline Chord Cladding Clip Closure Strip An A-307 steel bolt embedded in the concrete footing to anchor the base plate of the
More informationHazlan Abdul Hamid* & Mohammad Iqbal Shah Harsad
Malaysian Journal of Civil Engineering 28(1):59-68 (2016) BEHAVIOUR OF SELF-DRILLING SCREW UPON SINGLE SHEAR LOADING ON COLD FORMED STEEL Hazlan Abdul Hamid* & Mohammad Iqbal Shah Harsad Faculty of Civil
More informationMira Dedijer 1, Stéphane Roche 2, Yves Weinand 3 1 INTRODUCTION 123. θ rotations.
SHEAR RESISTANCE AND FAILURE MODES OF EDGEWISE MULTIPLE TAB-AND-SLOT JOINT (MTSJ) CONNECTION WITH DOVETAIL DESIGN FOR THIN LVL SPRUCE PLYWOOD KERTO-Q PANELS Mira Dedijer, Stéphane Roche, Yves Weinand ABSTRACT:
More informationinter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering August 2000, Nice, FRANCE
Copyright SFA - InterNoise 2000 1 inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering 27-30 August 2000, Nice, FRANCE I-INCE Classification: 2.5 SOUND-BASED METHOD
More informationHECO-TOPIX -CombiConnect HECO-TOPIX -Therm HCS-Calculation software
HECO-TOPIX -CombiConnect HECO-TOPIX -Therm HCS-Calculation software THE WOOD SCREW FOR THE PROFESSIONAL The HECO-Calculation software (HCS) and HECO-TOPIX Woodscrews for easy estimation and safe assembling
More informationEngineering Research into Traditional Timber Joints
Engineering Research into Traditional Timber Joints Richard Harris, Wen- Shao Chang, Peter Walker (BRE CICM, The University of Bath) and Jon Shanks (CSAW Research Fellow, School of Architecture & Design,
More informationNON-LINEAR CONNECTION MODELS IN TIMBER ENGINEERING
NON-LINEAR CONNECTION MODELS IN TIMBER ENGINEERING Michael Dorn 1, Thomas K. Bader 2 ABSTRACT: In this contribution, a numerical model for connections in engineered timber structures, using specially designed
More informationFRP GATES MM08 FRP GATES Rev. 3 COMPOSITE SOLUTION PAGE 1
FRP GATES MM08 08.02.2016 Rev. 3 FRP GATES COMPOSITE SOLUTION PAGE 1 SUMMARY 1. USES AND CHARACTERISTICS... 3 2. EMPLOYMENT FIELDS... 4 3. MATERIALS... 5 3.1 TABLE OF PROFILES AND STRUCTURAL ACCESSORIES...
More informationAn Investigation of Optimal Pitch Selection to Reduce Self-Loosening of Threaded Fastener under Transverse Loading
IJSTE - International Journal of Science Technology & Engineering Volume 3 Issue 01 July 2016 ISSN (online): 2349-784X An Investigation of Optimal Pitch Selection to Reduce Self-Loosening of Threaded Fastener
More informationComparative Evaluation of Resistance Made Simple Shear Connection with Bolts and With Welding
International Journal of Engineering Inventions e-issn: 78-7461, p-issn: 319-6491 Volume 3, Issue 7 (February 014) PP: 1-5 Comparative Evaluation of Resistance Made Simple Shear Connection with Bolts and
More informationReview on on-site splice joints in timber engineering
COST Timber Bridges Conference 2014 1 Review on on-site splice joints in timber engineering Martin Cepelka 1, Kjell Arne Malo 2 Summary There are various examples of use of moment resisting splice joints
More informationButt Two pieces of wood meeting with flat sides adjoining usually at right angles. Some type of connector is needed to prevent movement.
Wood Connections There are basically five different types of connectors: Interlocking (carpentry joints), Dowel, Metal Connectors, Special Formed Connectors and Adhesives. I Interlocking (Carpentry Joints)
More informationAbout Everite and Nutec 2. Nutec Bigsix Tiles : Compsition and Product Quality 4. Installation Guide 5. Support Structure 6
c o n t e n t s About Everite and Nutec 2 Nutec Bigsix Tiles : Compsition and Product Quality 4 Installation Guide 5 Support Structure 6 Light Weight Steel Sections 4 Timber Supports 5 Mitre Details 5
More informationThe available roof cover choices are listed below: Fiberglass, Translucent Panels Steel. Shingles, Asphalt/Fiberglass, Irregular Pattern
Navigation Roof Cover Roof Cover The different choices available for roof materials are listed below. Enter the percentage of each roof material found on the home. NOTE: Typically you would enter a percentage
More informationLoad tables for a transport anchor system with Würth ASSY 3.0 combi self-tapping screws = 12 mm as defined under ETA-11/0190 (6/27/2013)
erner hartmut Load tables for a transport anchor system d with Würth ASSY 3.0 combi self-tapping screws = 12 mm as defined under ETA-11/0190 (6/27/2013) Threaded length lg = 120 mm Transport anchor system
More informationInstruction Manual for installing
Instruction Manual for installing Preloaded (HSFG) Bolting with TurnaSure DIRECT TENSION INDICATORS TurnaSure LLC TABLE OF CONTENTS Introduction... 1 Theory of Preloaded Bolting Assemblies... 2 Tightening
More informationLoad tables for a transport anchor system with Würth ASSY 3.0 combi self-tapping screws = 10 mm as defined under ETA-11/0190 (6/27/2013)
prof. dr.-ing. erner hartmut Load tables for a transport anchor system d with Würth ASSY 3.0 combi self-tapping screws = 10 mm as defined under ETA-11/0190 (6/27/2013) Threaded length lg = 60 mm Transport
More informationA Shell construction
A Shell construction A 4/2012 Content 1 BASE AND WALL ANCHORING 1.1 Base with mortar bed 1.2 Base with sill plate 1.3 Base with raised sill plate 1.4 Concrete base (mortar bed) 1.5 Concrete base (sill
More informationVerification Processes for. (CLT) in the Frame of EN. Graz University of Technology. Speaker: holz bau forschungs gmbh, Graz
Verification Processes for Cross Laminated Timber (CLT) in the Frame of EN 1995 Robert A. Jöbstl Speaker: Thomas Bogensperger Institute for Timber Engineering and Wood Technology Graz University of Technology
More informationLoad tables for a transport anchor system with Würth ASSY 3.0 combi self-tapping screws = 12 mm as defined under ETA-11/0190 (6/27/2013)
prof. dr.-ing. erner hartmut Load tables for a transport anchor system d with Würth ASSY 3.0 combi self-tapping screws = 12 mm as defined under ETA-11/0190 (6/27/2013) Threaded length lg = 80 mm Transport
More informationHours / 100 Marks Seat No.
17610 15116 4 Hours / 100 Seat No. Instructions (1) All Questions are Compulsory. (2) Answer each next main Question on a new page. (3) Illustrate your answers with neat sketches wherever necessary. (4)
More informationCONNECTIONS FOR CONTINUOUS FRAMING IN PRECAST CONCRETE STRUCTURES
CONNECTIONS FOR CONTINUOUS FRAMING IN PRECAST CONCRETE STRUCTURES G.Krummel PEIKKO GmbH, Waldeck, Germany Abstract Connections for continuous framing in precast concrete structures have been a problem
More informationProposal. Analysis of Parallel Vibration Paths with Potential Application to Vehicle Noise. Reduction. Submitted to. The Engineering Honors Committee
Proposal Analysis of Parallel Vibration Paths with Potential Application to Vehicle Noise Reduction Submitted to The Engineering Honors Committee 119 Hitchcock Hall College of Engineering The Ohio State
More informationUL Construction No. 254
UL Construction No. Wind-Uplift - Class 90 (See Item No. ) / Fire Not Investigated Metal Roof Deck Panels* Snap-Clad No. MSG or No. MSG min. thickness coated steel panels. Panels in. wide max., 0 in. wide
More information