Design of Flat/Sloped Writing Desk Considering Acceptability of Individual Preference Regarding Desk Heights

This study examined the desk heights of flat/sloped writing desks with the hypothesis that tilted boards can adjust to height differences. We conducted two experiments: a pilot experiment investigating the effect of a tilted board on subjective usability and other measured responses, and another experiment analyzing the combination of a tilted angle with varying desk heights. As a result, we found that subjective usability of the tilted desk was significantly better than a flat desk. Additionally, it was suggested that a 10° tilted board can accommodate a wider range of Sashaku (height difference between desk and seat) than other conditions. Based on the results, we calculated quadratic curves with the acceptable percentages and Sashaku as the objective and explanatory variables, respectively, for each tilted angle to derive the recommended ranges of Sashaku. Finally, we proposed design values for the flat/sloped writing desk that can consider individual preferences of desk heights.