US Dept of Labor

Occupational Safety & Health AdministrationWe Can Help

Regulations (Standards - 29 CFR) - Table of Contents
• Part Number: 1926
• Part Title: Safety and Health Regulations for Construction
• Subpart: P
• Subpart Title: Excavations
• Standard Number: 1926 Subpart P App F
• Title: Selection of Protective Systems
• GPO Source: e-CFR

The following figures are a graphic summary of the requirements contained in subpart P for excavations 20 feet or less in depth. Protective systems for use in excavations more than 20 feet in depth must be designed by a registered professional engineer in accordance with 1926.652(b) and (c).


                    _________________________
                   |                         |
                   | Is the excavation more  |
                   | than 5 feet in depth?   |
                   |_________________________|
                               |
                               |
 ____________________          |           ___________________
|                    |   NO    |  YES     |                   |
| Is there potential |_________|__________| Is the excavation |
|    for cave-in?    |                    |   entirely in     |
|____________________|                    |   stable rock?    |
        |                                 |___________________|
        |                                               |
        |            ________________________           |
        |    NO     |                        |   YES    |
        |___________| Excavation may be made |__________|
        |           |  with vertical sides.  |          |
        |           |________________________|          |
        |                                               |
        |                                               |
        |            ________________________           |
        |   YES     |                        |    NO    |
        |___________|  Excavation must be    |__________|
                    |  sloped, shored, or    |
                    |      shielded.         |
                    |________________________|
                               |
          Sloping              |      Shoring or shielding
         ______________________|________________________
        | selected.                   selected.         |
        |                                               |
  ______|_________                             _________|______
 |                |                           |                |
 | Go to Figure 2 |                           | Go to Figure 3 |
 |________________|                           |________________|



               FIGURE 1 - PRELIMINARY DECISIONS



                    _________________________
                   |                         |
                   | Sloping selected as the |
                   |  method of protection   |
                   |_________________________|
                               |
                               |
                    ___________|______________
                   |                          |
                   | Will soil classification |
                   |   be made in accordance  |
                   |  with Sec. 1926.652(b)?  |
                   |__________________________|
                               |
                               |
                      YES      |       NO
         ______________________|______________________
        |                                             |
        |                                             |
________|____________________        _________________|________
|                             |      |                          |
| Excavation must comply with |      | Excavations must comply  |
| one of the following three  |      | with Sec. 1926.652(b)(1) |
| options:                    |      | which requires a slope   |
|_____________________________|      | of 1 1/2 H:1V (34 deg.). |
|                             |      |__________________________|
|        Option 1:            |
|                             |
| Sec. 1926.652(b)(3) which   |
| requires Appendices A       |
| and B to be followed        |
|                             |
|                             |
|        Option 2:            |
|                             |
| Sec. 1926.652(b)(3) which   |
| requires other tabulated    |    FIGURE 2 - SLOPING OPTIONS
| data (see definition to     |
| be followed.                |
|                             |
|                             |
|        Option 3:            |
|                             |
| Sec. 1926.652(b)(4) which   |
| requires the excavation to  |
| be designed by a registered |
| professional engineer.      |
|_____________________________|



                ____________________________________
               |                                    |
               |   Shoring or shielding selected    |
               |   as the method of protection.     |
               |____________________________________|
                               |
                               |
                _______________|____________________
               |                                    |
               | Soil Classification is required    |
               | when shoring or shielding is       |
               | used. The excavation must comply   |
               | with one of the following four     |
               | options:                           |
               |____________________________________|
               |                                    |
               |            Option 1                |
               |                                    |
               | Sec. 1926.652(c)(1) which requires |
               | Appendices A and C to be followed  |
               | (e.g. timber shoring).             |
               |                                    |
               |                                    |
               |            Option 2                |
               |                                    |
               | Sec. 1926.652(c)(2) which requires |
               | manufacturers data to be followed  |
               | (e.g. hydraulic shoring, trench    |
               | jacks, air shores, shields).       |
               |                                    |
               |                                    |
               |            Option 3                |
               |                                    |
               | Sec. 1926.652(c)(3) which requires |
               | tabulated data (see definition) to |
               | be followed (e.g. any system as    |
               | per the tabulated data).           |
               |                                    |
               |                                    |
               |            Option 4                |
               |                                    |
               | Sec. 1926.652(c)(4) which requires |
               | the excavation to be designed by a |
               | registered professional engineer   |
               | (e.g. any designed system).        |
               |____________________________________|

              FIGURE 3 - SHORING AND SHIELDING OPTIONS



Next Standard (1926 Subpart Q)

Regulations (Standards - 29 CFR) - Table of Contents

Thank You for Visiting Our Website

You are exiting the Department of Labor's Web server.

The Department of Labor does not endorse, takes no responsibility for, and exercises no control over the linked organization or its views, or contents, nor does it vouch for the accuracy or accessibility of the information contained on the destination server. The Department of Labor also cannot authorize the use of copyrighted materials contained in linked Web sites. Users must request such authorization from the sponsor of the linked Web site. Thank you for visiting our site. Please click the button below to continue.

Close