To begin work on the roof level, copy information from the Typical level.

• Select the Roof level using the Floor Type drop-down combo box on the toolbar.
• Select Layout > Type > Copy.
• Copy All items from the Typical level.

Delete the unneeded beams from the Roof floor type.

• Select Layout-Beams-Delete
• Click [Fence] and fence the floor beams between grids 4 and 5 to delete them. (Include the floor beams on Grid line 5).
• Also delete the bracing beams south of the moment frame beams.

Delete the unneeded columns from the Roof floor type.

• Select Layout-Columns-Delete.
• Press [Fence] to return to graphics mode.
• Fence the columns between gridlines 4 and 5.

Now we're going to change steel beams to Joists.

• Change the Current Material to Steel Joist
• Select Layout > Joists > Change Material.
• Click [Fence].
• Fence all the floor beams in between all the major grid lines as well as the ones on grid line 3.

Add additional Joists as follows.

• Select Layout > Joist > Add Generation.
• Enter 5 for Number of Equal Spaces Per Beam.
• Click [Add]
• Start at the frame beam at B-4 and stop at E-4 then click to the south of that line to add joists that brace the frame beams.
  

  Roof Beam and Joist Framing