W5x16 is a small wide flange H-beam produced to American standard dimensions, commonly known as a W-shape. It is one of the lightest members in the W series and is widely used in construction and structural engineering for secondary and lightly loaded components. The designation W5x16 identifies the nominal depth class of 5 inches and the unit weight of 16 pounds per foot.
Dimensions and Weight
The W5x16 beam has a nominal depth of about 5 inches, approximately 127 mm, and a flange width of about 5.015 inches, approximately 127.4 mm. The web thickness is about 0.365 inches, approximately 9.3 mm, and the flange thickness is about 0.515 inches, approximately 13.1 mm. The unit weight is 16 pounds per foot, about 23.8 kg per meter. As with all W-shapes, the actual depth is slightly greater than the nominal value, and the section is rolled as a single piece with parallel flange surfaces.
Material Options
W5x16 sections are normally supplied in carbon or high-strength low-alloy grades. ASTM A36 is a carbon structural steel with a minimum yield strength of 36 ksi, about 250 MPa, and is the economical choice for general structural purposes. ASTM A572 Grade 50 provides a higher minimum yield strength of 50 ksi, about 345 MPa, for applications that need more capacity. ASTM A992 is a high-strength low-alloy steel developed specifically for wide flange shapes, with a minimum yield strength of 50 ksi, about 345 MPa, and improved weldability and toughness for modern framing and seismic design.
Features and Benefits
The W5x16 offers a good balance of strength and cost, which makes it attractive for budget-sensitive projects. It supports standard fabrication methods such as cutting, drilling, and welding, so it is easy to work with on site. The consistency and stability of the material ensure reliable and durable secondary structures, and its light weight reduces handling and erection effort compared with heavier beams.
Applications in Bridge Engineering
Because of its limited size and load capacity, the W5x16 is generally not used for primary bridge members such as main girders or piers. It is, however, widely used as secondary support in small bridges and in larger bridges for railing brackets, sidewalk support frames, and lighting or signal brackets. During construction it can be used for temporary structures such as scaffolding and formwork support systems, where easy handling and economy matter. It is also used for repair and local reinforcement of existing structures in areas that require a certain degree of rigidity without very high strength.
Applications in Buildings and General Structures
In buildings the W5x16 is used for light framing, lintels over openings, handrail supports, mezzanine floor joists, and equipment supports that carry modest loads. It is also common in industrial mezzanines, catwalks, and support framing where a compact, easy-to-connect member is needed. For heavier duties a deeper or heavier W-shape should be selected.
Frequently Asked Questions
What does W5x16 mean? W identifies the wide flange shape, 5 is the nominal depth in inches, and 16 is the unit weight of 16 pounds per foot, about 23.8 kg per meter.
What is the depth of the W5x16? The nominal depth is about 5 inches, approximately 127 mm, and the actual rolled depth is slightly greater.
What steel grades are available for W5x16? Common grades include ASTM A36, A572 Grade 50, and A992, depending on the strength and toughness requirements of the structure.
Can W5x16 be used as a main bridge girder? No, it is generally limited to secondary supports, temporary structures, and local reinforcement because of its small load capacity.
Is W5x16 easy to fabricate? Yes, it can be cut, drilled, and welded with standard equipment and processes.
What is the weight of W5x16 per meter? about 23.8 kg per meter, since 16 pounds per foot converts to approximately 23.8 kg per meter.