Shoot-in Soil Nailing Specifications

Summary of Example Specifications

<h2>Summary of Example Specifications</h2><div class="grayed-title subsection">Specification Name/Number: Owner Design Guide Specification</div>Reference(s): A. B. Chance (CHANCE®)General CommentsThe Owner Design Guide Specification provides the contractor with a design. The contractor is then responsible for selecting appropriate equipment and construction methods to achieve the required design values. ClarityThe specification is easy to read without conflicting statements. The requirements of the contractor are described clearly.Risk AllocationThe specification assumes the owner has provided a screw-in soil nail wall design. The contractor must furnish all labor, materials, and equipment to complete their selected method of excavation and drilling. The contractor is responsible for achieving the performance requirements.Ability To Be Fairly BidA contractor is able to fairly bid on the work because of the completeness of the specification. However, the specification was developed assuming screw-in soil nails will be used and does not allow for substitution of other soil nail types.ConstructabilityThe specification does not require construction methods nonessential to constructing a screw-in soil nail wall.QC/QA VerificationThe specification includes specific pre‑construction and post‑construction testing regimen for materials and for load testing the soil nails. The testing procedure is clearly laid out with references to ASTM standards and testing equipment. The specification also includes a section on nail rejection and the actions that follow.CompletenessThe specification is complete. The requirements of the contractor are described clearly (submittals, testing, and some discussion of installation method). <div class="grayed-title subsection">Specification Name/Number: Design Build Solicitation Guide Specification</div>Reference(s): A. B. Chance (CHANCE®)General CommentsThe Design Build Solicitation Guide Specification requires the contractor to generate a design and select equipment and construction methods to meet the specified performance requirements. ClarityThe specification is easy to read without conflicting statements.Risk AllocationThe contractor is responsible for generating the design. In addition, the contractor must furnish all labor, materials, and equipment to complete their selected method of excavation and drilling. As a result, nearly all the responsibility lies with the contractor to achieve the performance requirements.Ability To Be Fairly BidThe completeness of the specification allows the contractor to fairly bid on the project. The specifications can be modified to allow for cost-effective, alternative wall types suggested by the contractor. ConstructabilityThe specification does not require construction methods nonessential to constructing a screw-in soil nail wall.QC/QA VerificationThis specification does not include a specific QC/QA section, but refers the reader to “requirements set forth in the Permanent Soil Nail and Wall Excavation and Temporary Shotcrete Facing and Wall Drainage Specifications” for material and construction requirements. This specification makes no specific reference to the load testing regimen outlined in the Owner‑Design Guide Specification. The specification requires that the contractor provide the owner with submittals, which include a description of the construction method.Completeness This specification is complete in the sense that enough project information is provided for the contractor to bid the job. The document lacks certain QC/QA requirements for approval (probably due to it being a design‑build specification).