Crane and Jibs Design Standards

Design Standards	AISC Steel Construction Manual All Gorbel® Jib and Work Station Cranes are in accordance with OSHA Specification 1910.179 and ANSI/ASME Specification B30.17, as they apply to Jib and Overhead Cranes. All Gorbel® Work Station Cranes meet or exceed the requirements of MMA MH27.2 specification for enclosed track systems. All Gorbel® Cleveland Tramrail® systems meet or exceed the requirements of MMA MH27.1. All Gorbel® Jib and Work Station Cranes have a design factor of 15% of the allowable capacity for hoist weight and 25% of the allowable capacity for impact.
Fabrication Standards	All welding is in accordance with AWS D14.1, and is performed by certified welders.
Material Standards	All structural shapes used by Gorbel are a minimum of ASTM A-36 designation. All pipes are structural grade ASTM A-53 and all tubing is ASTM A-500. All plate and round bar has minimum yield strength of 36 KSI.
Stainless Steel System Specs	Standard Finish: Gorbel stainless steel systems are supplied with standard mill finishes on tubing, plate, and structural components. Where accessible, Gorbel grinds sharp edges and corners and blends welds to provide a clean, consistent finish. Each product receives a general cleaning and light polishing using Scotch-Brite™-type buffing pads. The final appearance may vary based on the mill finish of each component. Stainless Steel Grades: Most structural components, including track, tubing, and plates, are manufactured from 304 stainless steel. Select hardware and miscellaneous components may be manufactured from 316 stainless steel.
Painting procedure	All Gorbel® Jib and Work Station structural components are shotblasted and/or washed utilizing a high pressure/high temperature iron phosphate solution prior to painting. A conventional air-assisted, airless paint system is used to apply a high solids industrial baking enamel which is cured at elevated temperatures inside an industrial oven. Some pre-assembled components (ex. Work Station Crane end trucks and hoist trolleys) are powder-coated finish.
Deflection Allowed	Consider both deflection and stress. The difference in elevation of the track between an unloaded crane and fully loaded crane; measure in inches. L= support center distance. Gorbel tends to have stricter deflectionguidelines than others in the industry because we consider both deflection and stress. Work Station Cranes: Typical design guidelines are L/450 for bridge cranes Work Station Jib Cranes: Typical design guidelines are L/320 for wall mounted (WSJ200), L/200 for free standing (WSJ360), and L/450 for aluminum work station jibs (AL100). Jib Cranes: Typical design guidelines are L/150 for wall cantilever (WC), free standing (FS), mast type (MT), and L/450 for wall bracket (WB) cranes. Due to configuration restrictions some models may not meet these guidelines.