Division 5 Metals

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Division 5 - Metals

• Structural Steel
• Steel Joists
• Metal Decking
• Cold Formed Metal Framing
• Metal Studs
• Metal Joists
• Metal Fabrication
• Ladders, Metal Stairs, Handrails, Gratings

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Structural Steel

• Includes columns, beams, lintels, trusses,
  purlins, bracing, bearing plates,
• Unit Ton (note grade and shape)
• Grade A36, A572 (high strength), A242 A588
  (high strength, corrosion resistant)
• Shape wide flange, S shape, channel, angle,
  structural tee, plate, tube,

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Wide Flange and S shapes
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Angles and Channels
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Structural Tee
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Bars, Plates, and Tubes
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Built-up Sections
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Metal Joists (open web steel joists)

• Metal joists are prefabricated lightweight
  trusses that are available in different series
• J and K series- spans to 56 (short span)
• LJ and LH series spans to 96 (long-span)
• DLJ and DLH series spans to 144 (deep
  long-span)
• Designation 12K4
• 12 depth in inches
• K joist series
• 4 designation within series (the higher the
  number, the heavier the joist)

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Open web steel joist
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Pitched Top Chord Joists
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Span Length
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Joist Girders

• Designed to carry the regularly spaced,
  concentrated loads consisting of the end supports
  of joists.
• Designation 48G 8N 8.8K
• 48G depth in inches
• 8N number of joist spaces
• 8.8K load on each panel point in kips

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Joist Girder
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Quantity takeoff

• Determine the LF of each different type of
  joist, use manufacturers table to find the
  weight per ft and total weight.
• Note type and number of accessories
• bridging (diagonal or horizontal)
• end anchorage (beam or wall)

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Horizontal Bridging
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Diagonal Bridging
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End Anchorage - Beam
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End Anchorage - Wall
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Metal Decking

• Metal decking is used for floor and roof
  applications.
• Determine type of decking, thickness, gage of
  metal, finish required, and method of attachment
• Unit square (100 sf)

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Type of Decking

• Floor
• simple
• with electrical raceways
• acoustical finishes
• recessed lighting
• Roof
• simple
• can receive recessed lighting
• has acoustical properties

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Steel Deck Units
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Finish, thickness and gage

• Finish
• unpainted
• primed
• painted
• galvanized
• Thickness 1.5 (most common) 3, 4.5,
  6, and 7.5
• Gage 22, 20, 18, 16, and 14

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Cold Formed Metal Framing

• Cold-formed steel is created by bending thin
  material such as steel sheet or plate into the
  desired shape without heating.

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Cold-formed steel
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Metal Studs

• Light gage (25 to 20 for non-load bearing and 18
  to 12 for load bearing) cold-formed steel.
• Electrogalvanized to resist corrosion.
• Available in thicknesses of 1 5/8 , 2 ½ ,
• 3 ½ , 4, and 6 inches.
• Unit LF, note type, gage, and width

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Miscellaneous Metals

• Ladders (VLF)
• Metal Stairs (LF or each flight)
• Handrails or Railings (LF)
• Gratings (SF)
• Floor Plates (Lb)