Posted By Descarte
Lower limits yes, uppers, no. = I would disagree
There are upper limits governed by a combination of type of work, PPE worn, duration and type of work load(ie manual handling), humidity (should be below 60%? work place regs) and common sense coupled a=with a WBGTi reading
I would say where temperatures are 30-32 Deg C and work being undertaken is considered active or light manual handling a 45 minute work to 15 minute rest ratio should be addopted if temperatures, air circulation, humidity cannot be reduced and PPE is being worn. A fresh supply of cool water and rest areas which are cool also need to be provided for staff to recover.
Most major work places including the military, Oil and gas industry etc.. take the WGBTi (or WGBTo for outdoors) in to account when planning or dealing with work in areas of high temperature and activity
FYI:
http://www.ala.usmc.mil/flags/Heat Index Heat Disorder
130°F or higher Heat stroke or sunstroke likely with continued exposure
105°F to 129°F Sunstroke, heat cramps or heat exhaustion likely and heat stroke possible with prolonged exposure and/or physical activity
90°F to 104°F Sunstroke, heat cramps and heat exhaustion possible with prolonged exposure and/or physical activity
80°F to 89°F Fatigue possible with prolonged exposure and/or physical activity
American guidance
Acclimatized
Demands ---Light--Moderate--Heavy--Very Heavy
100% WORK -29.5-----27.5-----26.0
75% WORK --30.5-----28.5-----27.5
25% REST
50:50------31.5-----29.5-----28.5-----27.5
25% WORK---32.5-----31.0-----30.0-----29.5
75% REST
Unacclamatised-
Demands --Light Moderate Heavy Very Heavy
100% WORK---27.5----25.0-----22.5
75% WORK----29.0----26.5-----24.5
25% REST
50:50-------30.0----28.0-----26.5-----25.0
25% WORK----31.0----29.0-----28.0-----26.5
75% REST
Fluid replacement guidelines
http://www.ala.usmc.mil/safety/files/encl1.pdfSo ok, its not UK law its common sense for people working in hot working environments, with PPE, undertaking light to heavy work
How would this apply to canteens, well if your working there, depends on the type of work your doing and the WGBTi. This has always been commong practice in most of my previous positions. Not often applied to office workers due to lack of manual work, though provision of water, humidity and air movement is still important
Waits for flames (mind the pun)