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Unformatted text preview: C E M 6 2 C o n s t r u c t i o n M e t h o d s CEM 602 Construction Methods Lecture 15 Structural Steel Erection 1 L e c t u r e 1 5 S t r u c t u r a l S t e e l E r e c t i o n C E M 6 2 C o n s t r u c t i o n M e t h o d s Structural Steel Materials W e l c o m e a n d C l a s s I n t r o d u c t i o n 2 C E M 6 2 C o n s t r u c t i o n M e t h o d s The Material Steel • Characteristics – Plentiful – Good Consistency – Good weight to strength ratio – Good for repetitive construction • Highrise buildings • Warehouses • Bridges – Poor fire resistance – Poor corrosion resistance W e l c o m e a n d C l a s s I n t r o d u c t i o n 3 C E M 6 2 C o n s t r u c t i o n M e t h o d s The Material Steel • Predecessors – Cast Iron – brittle – Wrought Iron – expensive • First use of iron in structures – England, late 18th century • First Inexpensive Steel – Bessemer Process – Openhearth Method W e l c o m e a n d C l a s s I n t r o d u c t i o n 4 C E M 6 2 C o n s t r u c t i o n M e t h o d s The Material Steel • What is steel? – Any IronCarbon Alloy with Carbon < 2% • What is structural steel? – Less than 0.3% Carbon – Traces of other impurities – Carbon content is key to characteristics. • How is steel produced today? – Basic Oxygen Process – Electric Furnaces W e l c o m e a n d C l a s s I n t r o d u c t i o n 5 C E M 6 2 C o n s t r u c t i o n M e t h o d s W e l c o m e a n d C l a s s I n t r o d u c t i o n 6 Structural Steel Manufacturing C E M 6 2 C o n s t r u c t i o n M e t h o d s Structural Steel Shapes • Wideflange (beams, columns, piles) – W4 to 40 x 9 to 730, e.g., W14 x 730 • American Standard (S’s) (outdated) • Angle (L’s) (lintels, connectors, bracing, trusses) • Channel (C’s) (lintels, connectors, bracing, trusses, beams) • Structural tee (WT’s, ST’s) • Plates W e l c o m e a n d C l a s s I n t r o d u c t i o n 7 3/17/12 C E M 6 2 C o n s t r u c t i o n M e t h o d s W e l c o m e a n d C l a s s I n t r o d u c t i o n 8 Structural Steel Shapes C E M 6 2 C o n s t r u c t i o n M e t h o d s W e l c o m e a n d C l a s s I n t r o d u c t i o n 9 Steel Joists • OpenWeb Steel Joists – Factory fabricated from rolled shapes (mainly angles and bars) – Kseries up to 60foot spans,8 to 30 inches deep – LHseries up to 96foot spans,18 to 48 inches deep – DLHseries up to 144foot spans,52 to 72 inches deep – Spaced 2 to 10 feet apart C E M 6 2 C o n s t r u c t i o n M e t h o d s Steel Joists • Joist Girders – Between columns to carry other joists – 20 to 72 inches deep – Much deeper than W sections W e l c o m e a n d C l a s s I n t r o d u c t i o n 10 C E M 6 2 C o n s t r u c t i o n M e t h o d s W e l c o m e a n d C l a s s I n t r o d u c t i o n 11 Steel Joists C E M 6 2 C o n s t r u c t i o n M e t h o d s W e l c o m e a n d C l a s s I n t r o d u c t i o n 12 Joining Steel Members • Rivets (very rarely used, if at all) C...
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This note was uploaded on 03/17/2012 for the course CEM 602 taught by Professor Amrkandile during the Spring '10 term at American University in Cairo.
 Spring '10
 AmrKandile

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