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Structural Steel

Structural Steel. 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

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Structural Steel

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  1. Structural Steel Prof Awad S. Hanna

  2. 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

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

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

  5. 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

  6. StructuralWT 7 x 49.5ST 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

  7. Wide FlangeW14 x 9014 WF 90 W = wide flange 14 = nominal depth 90 = #/lf use: beam and column S = standard 18 = nominal depth 70 = #/lf use: beam, not column Standard BeamS18 x 7018 I 70 Prof Awad S. Hanna

  8. 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

  9. 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

  10. 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

  11. All Columns this Row W24 x 68 W14x 43 W14x 68 W14x 68 W14x 43 Example Drawing for Structural Steel Take-Off 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 N W14 x 84 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 Prof Awad S. Hanna 20’0” 30’0” 30’0” 20’0”

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

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