1 / 7

Cover Plated Beams

Cover Plated Beams. Used in renovation or restoration projects or to meet difficult depth limitations. Possible cover plate configurations. The additional steel adds to the plastic section modulus increasing the moment capacity Z x,add = 2Ay (for beams symmetric about PNA)

michaelkbailey
Download Presentation

Cover Plated Beams

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cover Plated Beams Used in renovation or restoration projects or to meet difficult depth limitations

  2. Possible cover plate configurations • The additional steel adds to the plastic section modulus increasing the moment capacity • Zx,add = 2Ay (for beams symmetric about PNA) • A = cross sectional area of steel attached to one flange • y = distance from PNA to centroid of added steel

  3. Cover Plate Example p. 49 notes Design a cover plated alternative for the girder originally chosen for the office building design. A W24 x 117 was chosen to support the required load and meet the 24.5” depth limitation.

  4. Biaxial Bending of Beams Load causes bending about both principal (x and y) axes.

  5. Members Under Combined Forces p. 16.1 – 38 If Pu = 0(no axial load) Where, H1-1b If laterally supported From beam charts 5-71 – 5-102 if not laterally supported

  6. Biaxial Bending Example p. 46 notes Roof trusses for a pitched industrial building roof are spaced 14.8 ft c.c. along the length of the building. The A36 steel purlins which carry the actual roofing must therefore span 14.8 m. The roof deck will provide lateral support to the top flange of the purlins. In-plane bracing will be provided in the roof, so as to shorten the weak axis span of the purlins. See the partial plan view of the roof. The following loads must be considered: Snow & ice 20 psf Roofing & sheathing 25 psf Purlins & bracing 4 psf Wind load 10 psf

  7. 4.4 ft 4.4 ft

More Related