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Guardrail

Stamping Codes

Convex and Concave Curved Guardrail Panels

Finding the radius for a curved guardrail:

Step 1

Starting at the last post in the straight run (point A), lay cloth tape along the path that the curved guardrail will follow.

Step 2

Mark off two points along the curved cloth tape: one at 6 ft. 3 in. (point B), and the second at 12 ft. 6 in. (point C).

Step 3

Pull string directly from starting point (point A) to the second mark-off point (point C).

Step 4

Measure from the first markoff point (point B) over to the midpoint of the taut string. This measurement (D) is the rise.

Step 5

Check the chart to find the radius (R), given the rise (D). Example: a rise of 3 1/8 in. would result in a radius of 60 ft.

RADII ANGLE CHORD HEIGHT / RISE
5 143˚ 14’ 9' 5-7/8" 3’ 5”
10 71˚ 37’ 11’ 8-3/8” 1’ 10-3/4”
15 47˚ 45’ 12’ 1-3/4” 1’ 3-3/8”
20 35˚ 49’ 12’ 3-5/8” 11-5/8”
25 28˚ 39’ 12’ 4-1/2” 9-3/8”
30 23˚ 52’ 12’ 4-7/8” 7-3/4”
35 20˚ 28’ 12’ 5-1/8” 6-5/8”
40 17˚ 53’ 12’ 5-3/8” 5-7/8”
45 15˚ 55’ 12’ 5-1/2” 5-1/4”
50 14˚ 19’ 12’ 5-5/8” 4-5/8”
55 13˚ 01’ 12’ 5-5/8” 4-1/4”
60 11˚ 56’ 12’ 5-3/4” 3-7/8”
65 11˚ 01’ 12’ 5-3/4” 3-5/8”
70 10˚ 14’ 12’ 5-3/4” 3-3/8”
75 9˚ 33’ 12’ 5-3/4” 3-1/8”
80 8˚ 57’ 12’ 5-7/8” 3”
85 8˚ 26’ 12’ 5-7/8” 2-3/4”
90 7˚ 58’ 12’ 5-7/8” 2-5/8”
95 7˚ 32’ 12’ 5-7/8” 2-1/2”
100 7˚ 10’ 12’ 5-7/8” 2-3/8”
110 6˚ 31’ 12’ 5-7/8” 2-1/8”
120 5˚ 58’ 12’ 6” 2”
130 5˚ 31’ 12’ 6” 1-3/4”
140 5˚ 07’ 12’ 6” 1-5/8”
150 4˚ 47’ 12’ 6” 1-1/2”

 

Guardrail Drawings

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