Roymech provides useful information, tables , schedules and formula related to mechanical engineering and engineering materials. It provides convenient access to data for design engineers and engineering draughtsmen.   The site also lists useful engineering standards and includes equipment suppliers. The site is undergoing some major changes to improve it useability and update to the latest technology and standards.

Useful dimensions for general design Drawing

Height Dimensions

Normal heel height 26mm
Vertical Space for foot 100mm
Stair Riser 200mm
Ladder Rung Space 300mm
Max Step height 380-400mm
W.C height 400mm
Stool height 650mm
Knee Clearance (min) 660mm
Table height 700mm-740mm
Panic Bar 840mm
Hand Rail- stairs 860mm
Work Bench 920mm -965mm
Hand Rails 920mm -1065mm
Door knobs 960mm
Counter 1020mm -1090mm
Telephone dial- Men sitting 1070mm
Push Bar 1150mm
Wall Switch 1220mm
Grab Bars 1380mm
Telephone dial-Men Standing 1450mm
Instrument Dials-Men Standing 1450mm
Mirror Centreline 1550mm
CatWalk ceiling (min) 1600mm
Highest Shelf 1830mm
Tel booth door 1930mm
Door height (min) 1980mm
Ceiling height (min) 2040mm
Std. Door height 2040mm-2100mm

Width Dimensions

Stair Tread Width-Min 280mm
Seat Width -Min 450mm
Seat Depth -Min 400mm
Internal door width =Min
Lift door width =Min
External door width=Min
Gangway width
-One man occasional
Clearance Round Main equipment 1000mm
Gangway width
-One man frequent use
Main Gangways 1830mm
Clearance Round Main equipment 1000mm
Clearance Round Main equipment 1000mm
Corridor Width- Unobstructed 1200mm
Corridor Width-
Allowing Wheelchair Passing

Space Requiirement