Simple Solutions That Work! Issue 7

The following are considered good engineering practice and general guidelines for anyone considering foundation loadings for foundry equipment. This information should be included in any foundation plan delivered to a contractor or engineer. The information is critical for proper design, especially considering the extreme duty presented by foundry molding and core making equipment. 1. Static and dynamic loadings Any foundation pad must include static and dynamic loading figures. A coordinate system should be established in order to place a designation of positive or negative force into the foundation. It is generally accepted practice that a (+) sign denotes forces into the foundation, while (-) sign denotes forces pulling at the foundation. 2. Live and dead loadings Live and dead loadings do not have to be distinguished. Both are combined into the static loads noted above. For example, consider a mold line with flasks moving along it. The static load is would include the conveyor itself plus the maximum load of the flasks. 3. Overturning moments The dynamic load should only include the overturning moment on the foundation pad. For example, if the same conveyor has a flask dead stop, this dead stop will create an overturning moment equal to the force of the flask multiplied by the perpendicular distance to the pad. JERRY SENK President EQUIPMENT MANUFACTURERS INTERNATIONAL, INC. ARTICLE TAKEAWAYS: 1. Understanding static and dynamic load figures to pace positive or negative force into the foundation 2. Dynamic load methods FOUNDATION LOADING GUIDELINES 40