Final answer:
In seeking the least expensive fireproofing system for an 8" wide flange beam, the most cost-effective options might include intumescent paint, fire-resistant wraps, or commonly, spray-on fireproofing, with spray-on options typically being the least expensive due to material and labor costs.
Step-by-step explanation:
The question pertains to the selection of an economical fireproofing system for the protection of an 8" wide flange beam. To determine the least expensive fireproofing method, one needs to consider various factors including material costs, installation labor, durability, and maintenance.
In general, the most cost-effective fireproofing materials for steel beams can include intumescent paint, fire-resistant wraps, or spray-on fireproofing such as cementitious or gypsum-based mixtures. Intumescent paint, for example, is a coating that expands when exposed to high temperatures and provides insulation to the steel beneath.
Fire-resistant wraps are materials that are wrapped around the steel beam to provide a protective barrier. Both solutions are usually less costly than other fireproofing methods such as rigid board or encasement in concrete, but prices can vary depending on supplier and regional costs. Spray-on fireproofing, which is typically considered the most cost-effective, can be applied quickly and might be the least expensive option for the steel beam mentioned due to lower material and labor costs.
However, precise cost estimates would require consulting with fireproofing professionals and obtaining quotes based on the specific requirements of the project.