In order to correctly define sloped roof two separate deck polygons are modeled.
Ram structural system sloped roof.
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The analysis and design of primary structural system.
What are other engineer s takes on diaphragm modeling of a typical untopped metal roof deck.
Analyze and design of any connection type and verify your connections in seconds all with comprehensive calculations including seismic compliance.
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When the roof loads are specified by the user the magnitude of the load should be that given as the basic roof live load value not the reduced value to account for slope or area.
You can have a rigid diaphragm that is sloped but in ram frame this is treated as a horizontal diaphragm.
Furthermore if your structure is subject to trust diaphragms should be turned off at least while investigating gravity loads.
Modeling building structures in ram structural s.
The ram structural system automatically considers both parameters when calculating the roof live load reduction.
We don t analyze sloped rigid diaphragms.
Bentley ram structural system full training.
Sloped diaphragm modeling.
Note that this requires that decks must be redefined in the modeler each sloped plane must be modeled as a separate deck polygon.
Ram structural system help.
Ram structural system helps engineers like you.
Ram structural system provides you a complete solution for analysis design drafting and documentation for steel and concrete buildings foundations and even individual structural components.
I use ram structural system s frame module for my lateral analysis of steel framed buildings with the following parameters for this type of roof deck.
Consider 1 1 2 vulcraft type b 20 ga design thickness 0 0358in.
Using a sloped semi rigid diaphragm is an alternative.
Sloping semirigid diaphragms are allowed in the program.
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When structural observation or field.