Measurement Guide
Choosing the Right Hinge
and the Right Number of Hinges
314
205
208
212
216
218
220
METAL
14.29mm
15.88mm
12.70mm
17.46mm
19.05mm
25.40mm
28.56mm
34.93mm
44.45mm
50.80mm
½
¾
1
1
1
1
¾
2
WOOD & METAL
44
4
4
4
4
4
4
4
4
4
4
204
114
106
100
101
303
103
203
4
2
4
2
33
3
2
33
22
3
2
3
22
3
2
3
2
3
3
2
2
3
2
3
3
2
2
3
70 1,750
1,250
700
500
300
400
900
200
100
50
60
40
30
15
20
10
5
4
in mm
200
500
300
150
80
40
20
10
400
100
60
15
30
180
90
45
35
70
25
15
10
7
5
135
225
kg lb
Number
of Hinges
Required
Line A Line A
Door Material
Hinge Number
314
205
208
212
216
218
220
204
114
106
100
101
303
103
203
Hinge Number
Door Width
in Inches and 
Millimeters
Door Weight 
in Pounds and
Kilograms
Minimum
 Door
 Thickness
5
6
4
For your convenience, an 
interactive, easy to use hinge 
sizing calculator is available on  
our website, www.soss.com.
If the information you need is not 
on the online calculator or this chart, 
consult the factory.
To obtain the best performance 
from SOSS Invisible Hinges, it is 
recommended that the largest 
hinge model be used for the 
material thickness of the door.
Every door should be provided 
with at least one hinge for every 
30 inches in height or portion 
thereof; however, more hinges 
may be required per chart below.
For example, a 90" door needs three 
hinges and a 91" door needs four.
DIRECTIONS
After determining the weight and 
width of the door, draw a straight line 
through the door width and weight to 
line “A”, as indicated in the example.
Continue with a horizontal line 
sideways from the point of intersection 
with line “A” until the door thickness 
is reached. Use the number of hinges 
and the model number indicated on 
this line.
To use this chart as a working guide, 
we suggest that you photocopy 
this page.
EXAMPLE
A wood door 30" wide, 200 lbs., 
with a thickness of 1¾" will require 
four #218 SOSS Invisible Hinges. 
The red line shows how the sizing 
and selection were determined 
from the hinge sizing chart.
NOTE: For Fire-Rated Hinges, use formulas described on page 40.
NOTE: For doors that exceed size/weight on this chart, consider using 
our new Hercules hinges shown on page 37.
The hinge sizing chart above 
has been developed to assist 
you in determining the correct 
size and number of hinges 
for your installation.
 Door Hardware  | 51 |

