1. DR. Nabil Dmaidi Structural Steel

2. DR. Nabil Dmaidi Type of Steel n 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.

3. DR. Nabil Dmaidi Table 1, Rolled-steel shape designations Weight: 40.8 lb/sq. ft/ in 1” 1’

4. DR. Nabil Dmaidi Steel Sections: Channel C 8x11 C= channel 8= nominal depth weight= 11.5 #/Lf Use: n beams and built-up members

5. DR. Nabil Dmaidi 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 # n Bracing and build-up members

6. DR. Nabil Dmaidi 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: n Build-up sections

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

8. DR. Nabil Dmaidi Estimating Tips n Nominally taken off and priced by weight n Group for take off by: – Grade of steel – Type of section or member – Method of tied connection – location n Maintain consistent sequence of take off. Common: – Columns and detail – Beams and detail (floor by floor) – Bracing and flooring

9. DR. Nabil Dmaidi Pricing n Depends on where material is purchased. – Mill price apply to large orders. – Warehouse price apply to small orders from local supplier. n Prices are as of time of delivery. Need escalation clauses to be clearly set forth. n Price is made up a base plus extras.

10. DR. Nabil Dmaidi Pricing Structural Shapes n Prices are expressed in cents per pound. n W14x95 - 32.68 ft, A36 steel (3104.6#) – Base17.00 – Dimension:shape 0.45 length-quantity 1.00 – Pack 0.00 – Mark 0.00 – Load 0.20 18.65

11. DR. Nabil Dmaidi Example Drawing for Structural Steel Take-Off

12. DR. Nabil Dmaidi Table 2, List of Steel Quantities n The cost of plates and connectors (bolts or welding) are not included.