Structural Steel Prof Awad S. Hanna

Type of Steel Designated by the letter “A” followed by the American Society for Testing and Materials (ASTM) designation number. The principal types of structural steel include: A36 carbon structural steel A572 high-strength low-alloy structural steel A588 corrosion-resistant high-strength low-alloy structural steel. Prof Awad S. Hanna

Table 1, Rolled-steel shape designations 1” Weight: 40.8 lb/sq. ft/ in 1’ 1’ Prof Awad S. Hanna

Steel Sections: Channel C 8x11 C = channel 8 = nominal depth weight = 11.5 #/Lf Use: beams and built-up members Prof Awad S. Hanna

Steel Sections: Angle L 5 x 3 x 5/8 L = angle 5 = length of one leg 3 = length of another leg 5/8 = nominal thickness need to look up # Bracing and build-up members Prof Awad S. Hanna

Structural WT 7 x 49.5 ST 9 x 35 WT = cut from wide flange (14 x 90) 7 = nominal depth 49.5 = #/lf ST = cut form S beam (18 x 70) Use: Build-up sections Prof Awad S. Hanna

Wide Flange W14 x 90 14 WF 90 Standard Beam S18 x 70 18 I 70 W = wide flange 14 = nominal depth 90 = #/lf use: beam and column Wide Flange W14 x 90 14 WF 90 S = standard 18 = nominal depth 70 = #/lf use: beam, not column Standard Beam S18 x 70 18 I 70 Prof Awad S. Hanna

Estimating Tips Nominally taken off and priced by weight Group for take off by: Grade of steel Type of section or member Method of tied connection location Maintain consistent sequence of take off. Common: Columns and detail Beams and detail (floor by floor) Bracing and flooring Prof Awad S. Hanna

Pricing Depends on where material is purchased. Mill price apply to large orders. Warehouse price apply to small orders from local supplier. Prices are as of time of delivery. Need escalation clauses to be clearly set forth. Price is made up a base plus extras. Prof Awad S. Hanna

Pricing Structural Shapes Prices are expressed in cents per pound. W14x95 - 32.68 ft, A36 steel (3104.6#) Base 17.00 Dimension: shape 0.45 length-quantity 1.00 Pack 0.00 Mark 0.00 Load 0.20 18.65 Prof Awad S. Hanna

Example Drawing for Structural Steel Take-Off All Columns this Row W24 x 68 W14x 43 W14x 68 W14x 68 W14x 43 28’0” W14 x 43 W14 x 84 W14 x 103 W14 x 84 W14 x 43 All Columns this Row W24 x 100 W18 x 40 W18 x 70 W18 x 70 W18 x 40 14’0” W14 x 43” W14 x 84 W14 x 84 W14 x 43 All Columns this Row W24 x 100 NOTE: All columns are 12’0” in length W18 x 50 W18 x 50 14’0” W14 x 43 W14 x 84 W14 x 84 W14 x 43 All Columns this Row W24 x 100 W18 x 40 W18 x 70 W18 x 70 W18 x 40 W14 x 84 N 28’0” W14 x 43 W14 x 103 W14 x 84 W14 x 43 All Columns this Row W24 x 68 W14x 43 W14x 68 W14x 68 W14x 43 20’0” 30’0” Prof Awad S. Hanna 30’0” 20’0”

Table 2, List of Steel Quantities The cost of plates and connectors (bolts or welding) are not included. Prof Awad S. Hanna