The advantage of using performance request for proposals are that they utilize the geotechnical engineer's professional judgment to evaluate the site and recommend the extent of soil and substructure investigation necessary for the proper design of the substructure. A soil boring log, which is prepared by the geotechnical engineer, identifies the layers of soil found at specific depths beneath the surface and lists several measured characteristics of this soil, which could impact the design of any structure built upon it. Footings lie under the basement, crawl space, or foundation walls, and transfer structural loads from the walls of the building to the supporting soil. Structural chemical grouting permeates sands with grouts and produces a stronger sandstone‐like strata that carries the loads. Testing of deep foundations is conducted to verify the load capacity and structural integrity of deep foundation elements.
Erosion can damage the site and pollute waterways with sediment. The need for mechanical stabilization can be reduced through careful site gradings that divert or slow the velocity of runoff and by avoiding disturbances to stable, natural streambanks. This chapter addresses site lighting as a component of site electrical utilities. Architects can use several on‐site measures to control runoff in development projects. Ditches are typically excavated along the upslope portion of the site or around the perimeter, to intercept water before it reaches the site. Through the process of grading and earthwork, the designer adapts a building program from a two‐dimensional drawing board to the dynamics of an actual site. The chapter concentrates on access and safety design issues. There are differences in the design requirements between local, state, and federal accessibility and safety regulations. Identifying and determining the relevant regulations for a project requires research and discussion with the project client.
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