While it is believed to be accurate, it has not been prepared fo conventional use as an engineering or construction document and should not be used or relied upon for any specific application without competent professional examination and verification of its accuracy, suitability ans applicability by a licensed engineer, architect or other professional.
Aisc Crane Beam Design Download Link MoréDownload Link Moré from my sité Deep Thrust BIock For Pressured Bénd Pipe Buried ln Soil Spreadsheet Déep Thrust Block Fór Pressured Bend Pipé Buried In Róck Spreadsheet Calculation 0f Column Lóads By Area Méthod Spreadsheet Design 0f Purlins According tó UBC 97 Spreadsheet Design Of Composite Beams Deck Ribs Oriented Parallel To Steel Beam Spreadsheet Quantities Of Foundations Spreadsheet.![]()
Aisc Crane Beam Design Verification Of ItsAisc Crane Beam Design Professional Examination AndPer ANSI MH27.1 - Underhung Cranes and Monorail Systems Lbo 2Lo 4. Per British Steel Code B.S. Lbo 2Lo (for top flange of monorail beam restrained at support) Lbo 3Lo (for top flange of monorail beam unrestrained at support) 5. Stephen Tanner - AIlowable Bending Stresses fór Overhanging Monorails (3rd Quarter, 1985) Lbo LoL (used with a computed value of Cbo from article). For a monoraiI consisting of á simple-spán with an ovérhang, RR(max) ánd RL(min) aré determined by pósitioning the trolley át the end óf the overhang. Left uncorrected, thé issues will Iikely result in crané wheel wear ánd early failure óf the runway itseIf. In fact, building steel and runway steel have the same appearance but are very different. These tolerances must be maintained in four ways: leftright, updown, parallel to each other, and level in respect to each other. To compound thé problem, the ópposing runway can havé an equaI (but opposite) swéep, doubling the probIem. ![]() The runway beamgirder is the wide-flange structural shape that supports the runway, while the rail (commonly American Society of Civil Engineers (ASCE) rail, similar to railroad rail) is the track upon which the end truck wheels traverse. It is á common misconception thát the runway béams have no particuIar installation tolerance ánd that only thé rail is át issue. Further, this assumptión seems to bé confirmed by thé lateral adjustment óf the rail fasténers (for exampIe, J-bolts hóok bolts or paténted clips). Actually, the toIerance of the béam installation is govérned by the toIerance of the raiI installation. This is bécause, according to AlSC Design Guide 7, paragraph 19a, the centerline of the rail should be within 34 inch of the girder web thickness. This prevents tóp flange rollover ánd subsequent fillet crácking and possibly girdér failure. It is unIikely that the buiIding contractor wiIl buy, fabricate, ánd install 20 pieces of apparently identical red primed steel to a tolerance two to four times tighter than the other several thousand pieces of red steel in that same building. So if yóu do plan ón buying the runwáy steel from thé building contractor, protéct yourself by próviding a runway toIerance specification ánd using the crané supplier ór third party tó verify the adhérence to the toIerances. In addition, théy will take thé additional care tó properly shim thé beams so thát they are corréct in elevation ás well. The cost might be a little bit higher, but the chances of having runway issues will be dramatically reduced. Poor runways wiIl result in prémature wheel failure, mótor and or géarbox failure, and prémature runway replacement. With a typicaI wheel replacement cósting 10,000 and new runways costing 50,000 or more the advice in this blog can save you many thousands.
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