BS EN 14399-9 Dimensions of Direct Tension Indicators washers

DTI washer Dimensions Direct Tension Indicators Washer – dimensions

Dimensions of compressible washer-type direct tension indicator

According to BS EN 14399-9:2018, Table 2

Size
bolt diameter
Internal diameter
d1
External diameter
d2
Thickness
h1
Height over protrusion
h2
Height of protrusions
h3
Protrusion tangential diameter
d3
Protrusion internal diameter
d4
min max min max min max min max min
M12 12,75 12,85 26,0 32,5 2,5 5,5 0,8 20,0 13,85
M16 16,75 16,85 35,0 36,8 3,0 6,0 0,8 25,0 17,85
M20 20,95 21,05 41,0 46,0 3,5 6,5 0,8 29,0 22,05
M22 23,05 23,15 46,5 50,6 4,0 7,0 0,8 33,0 24,15
M24 25,15 25,25 50,0 55,2 4,0 7,0 0,8 38,0 26,25
M27 28,30 28,40 54,0 62,1 4,0 7,0 0,8 43,0 29,40
M30 31,45 31,55 59,0 69,0 4,0 7,0 0,8 46,5 32,55
M36 37,75 37,85 78,0 83,0 4,0 7,5 0,8 56,0 38,85
Dimensions in millimetres

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