Applying Loads

Now that the loads are defined, it's time to apply them to the floor.

Select the 2nd level type.
Select Layout > Loads > Surface Loads.
Highlight Lower Floors from the list box in the Surface Loads Layout Mode dialog box.
Click [Whole Diaphragm].
Click anywhere inside the diaphragms to add the load.

You should see the two floor diaphragms covered with a hatch pattern. At this stage you have the floor load over the entire floor area. You could now place other loads over a portion of the floor (as in the case of corridor, storage or equipment loads) and those loads would supersede (replace) the floor load in that area. Surface loads are not cumulative.

Select the 3^rd Level type.
Right click to return to the surface loads dialog box.
Ensure the Lower Floors load is selected and click [Whole Floor].
Right click to return to the assign dialog and select Corridor
Click [Add].
Click at the four corners of the corridor defined by the grids C-2, C-5, D-5 and D-2.
Snow loads are applied in much the same way as surface loads.
Select Layout > Loads > Snow.
Select Drift Roof load type
Click [Add].
Start by clicking at the upper left corner of the canopy, then select the upper right corner, then continue around clockwise around the slab edge close the polygon as indicated below.

Snow Loads on the Canopy
You will be prompted to select the 3 defining nodes of the snow load. Select the first two nodes that you picked and the coordinate of the furthest point, in-order so that the load has the highest magnitude across the north edge.

To layout the Line Loads:

Select Layout > Loads > Line Loads.
Highlight Cladding load from the list box.
Click [Whole Perimeter].
A line indicating the load will appear along all perimeter beams. The line will be broken up into segments, but this not a requirement when modeling line loads.
Right click to return to the Line Load Layout Mode.
Click [Delete > Fence].
Fence the entire atrium to delete the line loads on the beams enclosing it.
Right click to return to the Line Load Layout Mode.
Highlight Atrium Glass in the List
Click [Add].
Trace along the perimeter Atrium beams.

Add the Line loads to the 2^nd level type in a similar fashion by clicking from column to column or wall.

Note: When adding line loads to a deck with no beams (two-way slab) you must add them by using the [Add] command and clicking from column to column or wall. The [Whole Perimeter] command only works if the perimeter of the structure is enclosed by beams or walls.

Note: Point Loads and Line Loads do not have to be placed directly on a beam for them to be recognized by the program. When those loads are placed directly on the deck the program will distribute a portion of the load to the adjacent framing based on the angle of the deck and the location of the load.

Select the Typical level type.
Select Layout > Loads > Surface Loads.
Assign the Typical load to the [Whole Floor].
Repeat the steps above for adding a Corridor load to this level.
Select Layout > Loads > Line loads.
Repeat the steps above for adding the Cladding load to the Typical level.
Select the Roof level type.
Assign the Roof surface load to the [Whole Floor].
Select Layout – Loads – Line Loads and assign the Cladding load to the [Whole Perimeter].
Select File > Save.

Applying Loads

Snow Loads on the Canopy