| # | Letters of Interpretation |
|---|---|
| 1 | - 1926 Subpart P - Soil classification. |
| 2 | - 1926 Subpart P - Requirements for MTD to identify registered professional engineers. |
| 3 | - 1926 Subpart P - Placement of vertical hydraulic shoring members; Bending strength of plywood; use of non-structural sheeting. |
| 4 | - 1926 Subpart P - Clarification of Standards |