“…The need for the project is underscored by substantial evidence indicating that lower back is the most frequently injured body part, the most frequent source of pain complaint, health care utilization, lost work time, and early retirement of construction workers. Furthermore, while certain construction trades such as bricklayers [Holmstrom et al, 1992;Klimmer et al, 1996;Koningsveld and van der Molen, 1997;Sturmer et al, 1997], carpenters [Holmstrom et al, 1992;Punnett et al, 1996;Spielholz and Wiker, 1996;Albers et al, 1997;Bhattacharya et al, 1997], plumbers [Holmstrom et al, 1992;Rosecrance et al, 1996], operating engineers [Zimmermann et al, 1997], concrete workers [Holmstrom et al, 1992;Nurminen, 1997], and electricians [Hunting et al, 1994;Cook et al, 1997] have been studied quite extensively, musculoskeletal research targeting the mason tenders is limited.…”