Steel Beam Web Opening Spreadsheet

X depth of rectangular openings should not be greater than 0 5d and the length not greater than 1 5d for un stiffened openings.

Steel beam web opening spreadsheet.

Cut to a profile along the web and re welded to form a regular pattern of web openings and plate girders fabricated from three steel plates where the holes are cut in the web plate before welding the beam. The second worksheet goes through the same check as the first and then determines what reinforcing is necessary. Analysis of beams subjected to concentrated loads determines if web stiffeners are required per aisc 9th edition asd manual alex tomanovich. Custom shape american shape steel and composite beams with web openings steel design guide 2 aisc reference.

However existing methods are either based on the restricted patterns required for the fabrication of cellular beams or limited to fabricated beams only. The behaviour of beams with large web openings is described and a design model is presented. The steel construction institute sci 1 2 has covered the design of beams with web openings and software is available for cellular beams as well as for fabricated beams. However when the opening size shape or location no longer meets these conditions beams with web holes may be designed and detailed using the method given in part 5 of the handbook of steel construction.

The handbook method based on the work of redwood and shrivastava 1980 is applicable to class 1 and 2 sections with opening between 0 3. Asymmetry of opening position can cause web post moments. Stiffened opening length l o 1 5 h o high shear 2 5 h o low shear 2 5 h o high shear 4 h o low shear. Aisc design guide 02 steel and composite beams with web openings length.

T b forces kips kips in. Pedro antonio jiménez sánchez name. Opening reinforcement reinforced opening h b in. The clear spacing between such opening.

V u m u factor. X the diameter of circular openings is generally restricted to 0 5d. I based this program from alex tomanovich s stiffner spreadsheet but updated it to the 13th edition. Unstiffened opening length l o max.

Aisc design guide 02 steel and composite beams with web openings author. Steel beams with web openings version ii 28 4 x the best location for opening is where the shear force is the lowest. It is preferable to provide an upward positive eccentricity of the opening in the web depth. This workbook determines whether a steel beam with known loads and hence known moments and shears can have web openings added.