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Relationship between static and cyclic front to back load capacity of wooden chairs and evaluation of the strength values according to acceptable design values

Tolga Kuskun, Ali Kasal, Eva Haviarova, Halil Kilic, Mesut Uysal, Yusuf Ziya Erdil

Abstract


Tests were carried out to investigate the relationship between static and cyclic strength of wooden chairs. Furthermore, cyclic front to back load performance of chairs were compared with acceptable design loads that were given in the American Library Association (ALA) specifications. For this purpose, 90 chair frames were constructed of Turkish beech (Fagus orientalis L.) with round edge mortise and tenon joints, with tenons that varied from 30, 40, and 50 mm in width and 30, 40, and 50 mm in length. All joints were assembled with 65% solid polyvinyl acetate adhesive. Half of the chairs were subjected to “cyclic” loads and the other half were subjected to “static” loads based on the ALA specifications. In conclusion, it was recommended that the cyclic strength could be taken as the 56% of the static strength. According to the results, the chairs constructed with any size of tenons could meet the light-duty service (domestic usage), except for the chairs constructed with 30 by 30 mm tenons. The chairs constructed with 50 by 50 mm tenons could meet the heavy-duty service, whereas the chairs constructed with 30 by 50 mm tenons could meet the medium-duty service.


Keywords


Chair performance test; cyclic load; static load

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References


ALA (1982) The use of performance tests and quality assurance programs in the selection of library chairs. Am

Libr Assoc: Libr Technol Rep 18(5):483-571.

ASTM (2000) Standard test methods for small clear specimens

of timber. D 143-94. American Society for Testing

and Materials, West Conshohocken, PA.

ASTM (2001) Standard test methods for direct moisture

content measurement of wood and wood-base materials.

D 4442-92. American Society for Testing and Materials,

West Conshohocken, PA.

Eckelman CA (1988a) Performance testing of furniture. Part

I. Underlying concepts. Forest Prod J 38(3):44-48.

Eckelman CA, Erdil YZ (1999) Joint design manual for

furniture frames constructed of plywood and oriented

standard board. Pages 265-305 in the International Furniture

Congress, DATE, Istanbul, Turkey.

Eckelman CA, Erdil YZ (2001) General Services Administration

(GSA) upholstered furniture test method, FNAE

-214: A description of the method with drawings.

Purdue University, Department of Forestry and Natural

Resources, Extension Publication FNR - 176, West

Lafayette, IN.

Erdil YZ (2002) Integrated product engineering and performance testing of furniture. PhD thesis, Purdue University, West Lafayette, IN. pp. 2-19.

Evans JD (1996) Straightforward statistics for the behavioral

sciences. Brooks/Cole Publishing, Pacific Grove, CA.

pp.

Haviarova E, Eckelman CA, Erdil YZ (2001) Design and

testing of wood school desk frames suitable for production

by low technology methods from waste wood residues.

Forest Prod J 51(5):79-88.

Kasal A, Kuskun T, Efe H, Erdil YZ (2015b) Relationship

between static front to back loading capacity of whole

chair and the strength of individual joints. Pages 422-429

in 27. International Conference Research for Furniture

Industry, September 17-18, 2015, Ankara, Turkey.

Kasal A, Kuskun T, Efe H, Kılıc H, Erdil YZ (2016) Relationship

between the static and cyclic front to back

loading capacity of wood chairs. Pages 545-550 in the II.

International Furniture Congress, October 13-15, 2016,

Mugla, Turkey.

Kuskun T (2013) Effect of the tenon size and loading type on

chair strength and comparison of actual test and finite

element analyses results. MS thesis, Mugla Sitki Kocman

University, Mugla, Turkey.

Likos E, Haviarova E, Eckelman CA, Erdil YZ, Ozçifçi A

(2012) Technical note: Static versus cyclic load capacity of

side chairs constructed with mortise and tenon joints.

Wood Fiber Sci 45(2):223-227.

Ratnasingam J, Ioras F, McNulty T (2010) Fatigue strength

of mortise and tenon furniture joints made from oil palm

lumber and some malaysian timbers. J Appl Sci (Faisalabad)

(22):2869-2874.


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