A simple method for bridge designers to quickly develop preliminary estimates for bridge superstructure steelwork costs in New Zealand is described in the article Preliminary Bridge Estimating Tool - I Girder Bridges. The bridge estimating method is limited to traditional multigirder and ladder deck bridges. The bridge estimating method is suitable for spreadsheet application and there are two example templates included: Example 1; Example 2. The latest rates to be used are available here. The Online Estimating Guide for buildings may also be useful for indicative costs. When preparing final estimates, it is recommended that rates be confirmed with a suitable steel constructor.