effective clear widths calculator

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The actual door leaf width required to ensure the correct 'Effective Clear Width' as identified in Table 2 and Diagram 9 of Approved Document M 2004 and Figure 14 and table 2 of BS8300 will depend on the combination of several variables for reference:

  • Door thickness

  • Frame stop size

  • Hinge throw (based on the pivot point of the door)

  • Face fixed items on the closing face (E.g. Lever handle, pull handle, weatherboard, etc)


 


Single Leaf Situations
 
Leaf to Effective Clear Width
 Door width
 Door thickness
 Frame rebate
 Hinge knuckle
 Handle projection (where relevant)
 Effective clear width
 
Effective Clear Width to Leaf
 Effective clear width
 Frame thickness
 Door thickness
 Frame rebate
 Hinge knuckle
 Handle projection (where relevant)
 Minimum door width
 Structural opening
   
Paired Leaf Situation - One Leaf Open
 
Leaf to Effective Clear Width
 Primary leaf width
 Door thickness
 Hinge knuckle
 Handle projection (where relevant)
 Effective clear width
   
 
Effective Clear Width to Leaf
 Effective clear width
 Door thickness
 Hinge knuckle
 Handle projection (where relevant)
 Minimum primary door width


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