1. Add RadForm and set design time: 
this.AutoSize = true;
this.WindowState = FormWindowState.Maximized;
this.Size = new Size(750, 500); 
2. Add RadMenu with more than 10 menu items. 
3. Add RadStatusStrip with few items
4. When run the application and the items from strip are not visible 

Workaround: 
Restore the WindowState of form to Normal at design time and set the WindowState to Maximized run time in the Load event of form. Here is the snippet: 
private void RadForm1_Load(object sender, EventArgs e)
{
    this.WindowState = FormWindowState.Maximized;
}