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Chapter 4Chapter 4Structural Steel ConstructionStructural Steel Construction

Structural Steel Construction • Structural Steel Construction

Methods • Structural Steel Members • Fastening Systems •

Panel Members

Structural Steel Construction • Structural Steel Construction

Methods • Structural Steel Members • Fastening Systems •

Panel Members

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Structural steel members are erected, braced, and secured together to create a structural framework.

Structural steel members are erected, braced, and secured together to create a structural framework.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

In beam and column construction, beams and girders support floor and roof loads and distribute the loads to the vertical columns.

In beam and column construction, beams and girders support floor and roof loads and distribute the loads to the vertical columns.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

In long span construction, long distances are spanned with built-up structural steel girders and trusses.

In long span construction, long distances are spanned with built-up structural steel girders and trusses.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

In wall bearing construction, horizontal steel beams and joists are supported by other construction materials such as masonry.

In wall bearing construction, horizontal steel beams and joists are supported by other construction materials such as masonry.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Pre-engineered metal buildings consist of prefabricated structural steel members including beams, columns, girts, and trusses.

Pre-engineered metal buildings consist of prefabricated structural steel members including beams, columns, girts, and trusses.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Erection plans provide information regarding structural steel construction.Erection plans provide information regarding structural steel construction.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

A dimensioned grid of letters and numbers provides reference points on erection plans.

A dimensioned grid of letters and numbers provides reference points on erection plans.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Various types and grades of steel are used in structural steel construction.Various types and grades of steel are used in structural steel construction.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

A variety of steel shapes are commonly used in structural steel construction. Standard abbreviations and designations are included on erection plans to indicate structural steel members.

A variety of steel shapes are commonly used in structural steel construction. Standard abbreviations and designations are included on erection plans to indicate structural steel members.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Shop drawings provide detailed information required for the fabrication of structural steel members.

Shop drawings provide detailed information required for the fabrication of structural steel members.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Columns are commonly constructed using M-, S-, or wide-flange shapes.

Columns are commonly constructed using M-, S-, or wide-flange shapes.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Column locations are shown on erection plans with letter and number designations. Specific information about web depth and weight (in lb/ft) is provided for each column.

Column locations are shown on erection plans with letter and number designations. Specific information about web depth and weight (in lb/ft) is provided for each column.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Wide-flange beams are identified on erection plans with the letters “W” or “WF”.

Wide-flange beams are identified on erection plans with the letters “W” or “WF”.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Structural steel beams are fabricated based on shop drawings.Structural steel beams are fabricated based on shop drawings.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Open web steel joists span between beams and girders. The standard designation for open web steel joists includes the nominal depth (in inches), span classification (K, LH, or DLH), and chord diameter.

Open web steel joists span between beams and girders. The standard designation for open web steel joists includes the nominal depth (in inches), span classification (K, LH, or DLH), and chord diameter.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Erection plans indicate structural steel joist spacing and installation information. Open web steel joists are secured to beams or other supporting members using bolts or by welding.

Erection plans indicate structural steel joist spacing and installation information. Open web steel joists are secured to beams or other supporting members using bolts or by welding.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

A wide variety of structural steel shapes are joined together to form a truss. Common steel truss designs include the bowstring, flat, Howe, Pratt, scissors, and Warren.

A wide variety of structural steel shapes are joined together to form a truss. Common steel truss designs include the bowstring, flat, Howe, Pratt, scissors, and Warren.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Bridging and braces maintain alignment between structural steel columns, beams, and joists and increase resistance to loads.

Bridging and braces maintain alignment between structural steel columns, beams, and joists and increase resistance to loads.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Tie rods are used to brace across long distances.Tie rods are used to brace across long distances.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Proper bolt and nut installation is essential for proper structural fastener performance. Erection plan details are the primary reference for bolted connections.

Proper bolt and nut installation is essential for proper structural fastener performance. Erection plan details are the primary reference for bolted connections.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Ribbed bolts may be used where steel members are drawn tightly together before fastening. High-strength hex head bolts are identified with markings on the bolt head.

Ribbed bolts may be used where steel members are drawn tightly together before fastening. High-strength hex head bolts are identified with markings on the bolt head.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Details provide information regarding welded connections.

Details provide information regarding welded connections.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

The standard format used for weld symbols provides information regarding location, length, and type of welded joint.

The standard format used for weld symbols provides information regarding location, length, and type of welded joint.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Steel members may be cut to length using an oxyacetylene cutting torch.

Steel members may be cut to length using an oxyacetylene cutting torch.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Metal floor decking, manufactured in a variety of designs and dimensions, is attached to the top of open web steel joists to create a floor platform.

Metal floor decking, manufactured in a variety of designs and dimensions, is attached to the top of open web steel joists to create a floor platform.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Erection plans provide information regarding metal decking installation.

Erection plans provide information regarding metal decking installation.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Metal decking may be used as bridge deck forms. The decking remains in place after the shores and falsework are removed.

Metal decking may be used as bridge deck forms. The decking remains in place after the shores and falsework are removed.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

The exteriors of many light-gauge metal buildings are covered with prefinished metal panels.

The exteriors of many light-gauge metal buildings are covered with prefinished metal panels.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Metal roof decking is available in a variety of designs and dimensions.

Metal roof decking is available in a variety of designs and dimensions.

Chapter 4 — Structural Steel ConstructionChapter 4 — Structural Steel Construction

Roof decks may be formed of metal decking only or covered with waterproofing materials and insulation.

Roof decks may be formed of metal decking only or covered with waterproofing materials and insulation.