Steel

Type

Description

Unit Weight (pcf)

Ultimate Tensile Strength (ksi)

Ultimate Comp. Strength (ksi)

Image

steel members used fro truss members and connection elements; designated by the letter ‘L’

square or round solid steel sections used as compression, tension, and connection members

steel section formed by welding or bolting various rolled shapes

a hard, brittle and nonmalleable alloy composed of iron, 2-4.5% carbon, and 1-4% silicon; strong in compression, weak in tension

450

40-120

rolled C-shaped steel members mostly used for purlins and structural fascias; designated by the letter ‘C’

a type of steel that contains high levelsof copper and phosphorous that form a thin protective layer of brown rust on the surface that stops further corrosion when exposed to weather

steel member that has a lower depth to width ratio than wide flanges; designated by the letter ‘S’

thin film coatings that are sprayed or brushed on metal surfaces to provide fire protection

steel that contains 10-30% chromium that provides resistance to rust

an iron alloy with low carbon that is strong in both compression and tension

490

35-100

rolled T-shaped steel members used for truss chords and structural lintels

aluminum or zinc alloys that are melted and sprayed onto a metal surface to prevent corrosion

a type of steel that contains high levels of copper and phosphorous that form a thin protective layer of brown rust on the surface that stops further corrosion when exposed to weather

rolled steel member that has a high depth to width ratio; designated by the letter ‘W’

an alloy of iron that contains carbon and silicon that was used throughout the 19th century in bridge and building construction

480

10-40

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