private void readColdFormedDesignProps(XmlNode node)
{
//MaterialDesignProps dProps = mat.DesignProperties;
//if (dProps is ColdFormedDesignProps)
//{
// ColdFormedDesignProps props = (ColdFormedDesignProps)dProps;
// // xml.WriteStartElement("Material");
// readAttribute(node, "Material", mat.Name);
// readAttribute(node, "Fy", props.Fy.ToString());
// readAttribute(node, "Fu", props.Fu.ToString());
//}
}