1. 1

2. 2 Steel is prefabricated Shop-Fabricated Pieces

3. 3 Steel is prefabricated Welded plates, connection angles, and holes are done in a shop. Shop-Fabricated Pieces

4. 4 Steel is prefabricated Steel Erection

5. 5 Steel is prefabricated Steel Erection

6. 6 Steel is prefabricated The steel erector’s job is simple: lift and bolt Steel Erection

7. 7 Steel is prefabricated The steel erector’s job is simple: lift and bolt Steel Erection

8. 8 Steel is prefabricated The steel erector’s job is simple: lift and bolt Steel Erection

9. 9 Steel is prefabricated The steel erector’s job is simple: lift and bolt Simple Steel Erection

10. 10

11. 11 Tension Members in Truss (but BOLTS IN SHEAR)

12. 12

13. 13

14. 14 Bolted Moment Connections (we DO NOT WANT BOLTS TO EVEN SLIP!!)

15. 15 ASTM Bolt Types (AISC & NISD 2000) A307 – Low carbon steel – “Home Depot Bolt”  Silver color  Not commonly used

16. 16 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

17. 17 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

18. 18 ASTM Bolt Types (AISC & NISD 2000) A307 – Low carbon steel – “Home Depot Bolt”  F nt = 45 ksi  Group A (incl. A325) – High-strength medium carbon steel (above left)  F nt = 90 ksi Group B (incl. A490) – High-strength heat treated steel (above right)  F nt = 113 ksi

19. 19 A325 and A490 bolts: ½”, 5/8”, ¾”, 7/8”, 1”, 1-1/8” Common Bolt Sizes

20. 20 A325 and A490 bolts: ½”, 5/8”, ¾”, 7/8”, 1”, 1-1/8” Common Bolt Sizes Most Common

21. 21 Hole Types Std = 1/16” big O’size = 3/16” big Short Slot Long Slot