Post on 14-Jan-2016
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• Steel is prefabricated
Shop-Fabricated Pieces
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• Steel is prefabricated• Welded plates,
connection angles, and holes are done in a shop.
Shop-Fabricated Pieces
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• Steel is prefabricated
Steel Erection
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• Steel is prefabricated
Steel Erection
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• Steel is prefabricated• The steel erector’s job
is simple: lift and bolt
Steel Erection
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• Steel is prefabricated• The steel erector’s job
is simple: lift and bolt
Steel Erection
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• Steel is prefabricated• The steel erector’s job
is simple: lift and bolt
Steel Erection
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• Steel is prefabricated• The steel erector’s job
is simple: lift and bolt• Simple
Steel Erection
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Tension Members in Truss (but BOLTS IN SHEAR)
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Bolted Moment Connections (we DO NOT WANT BOLTS TO EVEN SLIP!!)
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ASTM Bolt Types
(AISC & NISD 2000)
• A307 – Low carbon steel – “Home Depot Bolt” Silver color Not commonly used
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ASTM Bolt Types
(AISC & NISD 2000)
• A307 – Low carbon steel – “Home Depot Bolt” Silver color Not commonly used
Group A (incl. A325) – High-strength medium carbon steel (above left) Black color Most common bolts used in building construction
• Group B (incl. A490) – High-strength heat treated steel (above right) Cost more than A325’s, but are stronger so fewer bolts may be necessary
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ASTM Bolt Types
(AISC & NISD 2000)
• A307 – Low carbon steel – “Home Depot Bolt” Silver color Not commonly used
Group A (incl. A325) – High-strength medium carbon steel (above left) Black color Most common bolts used in building construction
• Group B (incl. A490) – High-strength heat treated steel (above right) Cost more than A325’s, but are stronger so fewer bolts may be necessary
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ASTM Bolt Types
(AISC & NISD 2000)
• A307 – Low carbon steel – “Home Depot Bolt” Fnt = 45 ksi
Group A (incl. A325) – High-strength medium carbon steel (above left) Fnt = 90 ksi
• Group B (incl. A490) – High-strength heat treated steel (above right) Fnt = 113 ksi
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• A325 and A490 bolts: ½”, 5/8”, ¾”, 7/8”, 1”, 1-1/8”
Common Bolt Sizes
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• A325 and A490 bolts: ½”, 5/8”, ¾”, 7/8”, 1”, 1-1/8”
Common Bolt Sizes
Most Common
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Hole Types
• Std = 1/16” big
• O’size = 3/16” big
• Short Slot
• Long Slot