Structural Steel

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Structural Steel
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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.

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Table 1, Rolled-steel shape designations
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Weight 40.8 lb/sq. ft/ in
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1
4
Steel SectionsChannel C 8x11

• C channel
• 8 nominal depth
• weight 11.5 /Lf
• Use
• beams and built-up members

5
Steel SectionsAngle 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

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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

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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
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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

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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.

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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

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Example Drawing for Structural Steel Take-Off
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Table 2, List of Steel Quantities

• The cost of plates and connectors (bolts or
  welding) are not included.