Estimation of design load and distribution pattern for wooden classroom chairs in use at secondary schools in Ibadan, Nigeria

IF 1.3 Q2 MATERIALS SCIENCE, PAPER & WOOD International Wood Products Journal Pub Date : 2022-05-07 DOI:10.1080/20426445.2022.2071560
N. A. Adewole, A. Olorunnisola, E. B. Lucas
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Abstract

ABSTRACT The absence of an established design load constitutes a challenge to the engineering design of classroom furniture. This study developed a methodology for estimating design loads for single user (SU) and multiple user (MU) wooden classroom chair and desk combinations offered to secondary school students in Ibadan, Oyo State, Nigeria. Service load distribution patterns for the chair and desk members in normal, backward and front-reclining sitting postures were determined for 15 girls and 15 boys using bathroom scales. A T-test was used to compare the significance of the means of the proportions of users’ weights transferred to the chair and the floor. Design loads were 1 kN (SU) and 2.7 kN (MU) for chair and desk configurations, respectively. Each SU and MU leg should be designed to support 35% and 40% of the service loads, respectively. Gender, sitting postures, and chair and desk designs influenced load distribution patterns significantly.
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尼日利亚伊巴丹中学使用的木制教室椅的设计荷载和分布模式估计
摘要:缺乏既定的设计负荷对课堂家具的工程设计构成了挑战。本研究开发了一种方法,用于估算尼日利亚奥约州伊巴丹市中学生使用的单用户(SU)和多用户(MU)木制教室桌椅组合的设计荷载。使用浴室秤测定了15名女孩和15名男孩在正常、向后和向前倾斜坐姿下椅子和桌子构件的服务负荷分布模式。使用T检验来比较使用者的重量转移到椅子和地板上的比例平均值的显著性。椅子和桌子配置的设计载荷分别为1 kN(SU)和2.7 kN(MU)。每个SU和MU支腿的设计应分别支持35%和40%的工作负载。性别、坐姿、椅子和桌子的设计显著影响负荷分布模式。
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来源期刊
International Wood Products Journal
International Wood Products Journal MATERIALS SCIENCE, PAPER & WOOD-
CiteScore
2.40
自引率
0.00%
发文量
27
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