Because of permitting regulations, I can drive piling in a protected area. How can a bridge cross it?
First, choose a builder with experience in this type of situation. A qualified builder can most often customize the design of the bridge specifically for your project and crossing needs, taking into account any environmental or permitting challenges. In addition, timber pilings can be driven into almost any environment, and are often approved for permits when steel pilings are not. In general, freespan designs (no intermediate supports) are used for shorter distances, while a combination span (a combination of freespan and pile supported sections in the non-protected area) are usually used for larger, longer crossings and are a more economical choice.
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