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Materials & Specificationsaka: compositeaka: FRP

Composite Material

In Plain English

A construction material made by combining two or more materials to get better performance than either material alone.

Definition

A composite material in construction is a product made by combining two or more constituent materials with different properties to produce a material with superior or unique characteristics. Examples include fiber-reinforced polymer (FRP), wood-plastic composites, and structural insulated panels (SIPs). Composites often offer advantages in strength-to-weight ratio, corrosion resistance, and durability.

Why It Matters in Bidding

Composite materials often carry premium unit pricing and specialized installation, so when a spec names FRP, SIPs, or wood-plastic composites the estimator must source qualified suppliers and labor rather than substituting conventional materials that could make the bid non-responsive. Lead times and proprietary detailing also affect schedule and submittal risk, which belong in the bid's assumptions and qualifications.

Example

Bidding a coastal facility, an estimator prices FRP grating instead of galvanized steel because the spec calls for corrosion resistance, then notes the longer lead time as a qualification.

Related Terms

Fiber CementStructural Insulated PanelOriented Strand BoardLaminated Veneer Lumber

Frequently Asked Questions

Specs choose composites for properties like corrosion resistance, high strength-to-weight ratio, or thermal performance that conventional materials can't match in a given environment. Substituting a cheaper standard material risks rejection as non-responsive. Estimators should price the specified composite and only propose alternates through a formal substitution or value-engineering process.
Composites typically carry higher material cost and may require specialized labor, fasteners, or proprietary details. Some are manufactured to order, extending lead times that can drive procurement decisions and schedule sequencing. Estimators should confirm supplier availability and note long-lead items as qualifications so the bid reflects realistic delivery and installation timing.
Only through the contract's substitution procedure, usually with engineer approval and documentation showing equivalent performance. Quoting an unapproved alternate to undercut competitors can render a base bid non-responsive. The cleaner approach is to bid the spec and offer the cheaper material as a separate value-engineering option.

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