Ohio Admin. Code 4123:1-5-99
Where specified by Chapter 4123:1-5 of the Administrative Code, the following table to this rule will be used.
Table of standard materials and dimensions*
Material | Distance of opening from hazard zone | Maximum width of opening allowable | Minimum gauge (U.S. Standard) or thickness | Minimum height of guard from floor or platform level |
Inches | Inches | Feet | ||
Woven wire | Under 4 | *see table below | No. 16 | 7 |
4-15 | No. 12 | 7 | ||
Expanded metal | Under 4 | * see table below | No. 18 | 7 |
No. 13 | ||||
Perforated metal | Under 4 | * see table below | No. 20 | 7 |
4-15 | No. 14 | 7 | ||
Sheet metal | Under 4 | * see table below | No. 22 | 7 |
4-15 | No. 22 | 7 | ||
Wood or metal strip not crossed | Under 4 | * see table below | Wood 3/4 Metal No. 16 | |
4-15 | Wood 3/4 Metal No. 16 | 7 | ||
Standard guard railing* | Minimum 15 | - | - | - |
Maximum 20 |
Distance of opening from hazard zone (inches) | |
0.5 to 1.5 | 0.25 |
Over 1.5 to 2.5 | 0.375 |
Over 2.5 to 3.5 | 0.5 |
Over 3.5 to 5.5 | 0.625 |
Over 5.5 to 6.5 | 0.75 |
Over 6.5 to 7.5 | 0.875 |
Over 7.5 to 12.5 | 1.25 |
Over 12.5 to 15.5 | 1.5 |
Over 15.5 to 17.5 | 1.875 |
Over 17.5 to 31.5 | 2.125 |
Ohio Admin. Code 4123:1-5-99
Five Year Review (FYR) Dates: 11/1/2026
Promulgated Under: 119.03
Statutory Authority: 4121.12, 4121.121, 4121.13
Rule Amplifies: 4121.47
Prior Effective Dates: 01/01/1986, 04/10/2011, 06/01/2016