ASME NOG-1-2010 pdf download

ASME NOG-1-2010 pdf download.Rules for Construction of Overhead and Gantry Cranes (Top Running Bridge, Multiple Girder).
4100 GENERAL 4110 Scope Section4000 specifies the designcriteria,design,mate- rials, and fabrication procedures for the structural com- ponents of Types I, II, and III cranes. The structural components of the crane are identified in para. 4400. 4120 Nomenclature The nomenclature listed herein is used in the equa- tions in Section 4000. For further information on nomen- clature, application, and units of measurement, see the Section 4000 references noted in parentheses. A b p tensile stress area of bolt, in. 2 (para. 4323) a p plate length for direction parallel to the direc- tion of compression force (Table 4332.1-1); unsupported length of web plate between transverse (vertical) stiffeners, in. (para. 4334) b p plate width for direction perpendicular to the direction of the compressive force (para. 4331); unsupported length ofweb plate between longitudinal stiffeners, in. (Table 4332.1-1) b w p distance between web plates, in. (para. 4333) C p coefficient for spacing of transverse stiffeners of web (para. 4334) C c p column slenderness ratio separating elastic and inelastic buckling (para. 4312) C m p coefficientapplied to bendingterm ininterac- tion formula for prismatic members, and dependent upon column curvature caused by applied moments (para. 4321) DF p design factor (para. 4312) DFB p design factor for buckling (paras. 4332 and 4333) E p modulus of elasticity of the materials (29,000,000 psi for carbon steel) (paras. 4312, 4321, and 4331) h p depth of web, in. (para. 4333) K p buckling coefficient (paras. 4331, 4332.1, and 4333) K ? p effective lengthfactorfor compression(paras. 4331, 4332.1, and 4333) K ? p buckling coefficientfor shear (paras. 4331 and 4332.1) k p effective lengthfactor(paras. 4312,4321,4331, and 4332.1) l p unbraced length of member (para. 4312)
4132 Live Loads (a) Rated Load, P lr . The design rated load to be lifted and transported by the crane that by definition is not considered as the critical load. An allowance for lifting accessories that are not part of the crane, such as yokes, spreader beams, etc., is to be included in the design rated load. (b) Critical Load, P lc . For the definition of critical load, see para. 1150. In addition to listing each critical load, the purchaser shall furnish the duration in hours per year that each critical load is expected to be on the crane hook. An allowance for lifting accessories is to be included in each critical load. (c) Construction Load, P cn . The maximum expected construction load to be lifted and transported by the crane during the plant construction phase, prior to its use as a plant operating crane. (d) Credible Critical Load, P co and P cs . P co is the weight of lifted load that may be considered in combination with the operating basis earthquake (OBE). P cs is the weight of lifted load that may be considered in combina- tion with the safe shutdown earthquake (SSE). Alternatively, P co and P cs may be defined to be lifted loads in credible combinations with seismic events other than OBE and SSE. If this alternative method is used, the appropriate substitutionfor P eo and P es shall be made in load combinations P c10 and P c12 . The loads and seismic events shall be specified by the purchaser. 4133 Normal Operating Dynamic Loads (a) Hoisting Impact Load (HIL), P vi . The hoisting impact load is the result of sudden lifting of a load and other loading uncertainties that occur during normal crane operation. This load shall be determined by applying an HIL factor to the lifted load, including load block and attachments. The HIL factor shall be 0.5% of the hoisting speed in feet per minute, but not less than 15% nor more than 50%.
(b) Bridge and Trolley Travel Drive Inertia Forces (TDIF), P hb and P ht . Travel drive inertia forces result from the acceleration or deceleration ofthe crane bridge or trolley and depend on the magnitude of torque applied to the drive wheels. This force shallbe determined by applying a TDIF factor to the lifted load and weight of the crane components, including load block and attachments, and shall be imposed on the crane in the direction of bridge and trolley travel. The resulting inertia force in the direc- tion of bridge travel that corresponds to the trolley weight and lifted load, including load block and attach- ments, may be equally divided between the two bridge girders.