Labeling the Portal Frame
1. Eave Purlin , Z-Purlins and Top hat : provide additional roof support, creating
a horizontal diaphragm that supports the weight of the roof and deck.
2. Haunch bracket : Designed to strengthen the rafter-over-column haunch joint
reducing axial torque, generally known as twisting within the portal frame,
caused by standard loads.
3. End wall mullion : a structural system in which the load of the floor slab is
taken by prefabricated panels around the perimeter.
4. Flying bracing : to prevent the column or rafter from twisting or rotating when
under load.
5. Various fixing method : joining methods for fixing metal in place. Nonpermanent methods include nuts and bolts, screws and rivets.
6. Apex brace : (collar tie in tension) is vital in the construction process and aids
greatly in dispersing the load applied through the rafters, providing greater
strength within the portal
7. Apex bracket : connecting the two rafters and stabilizing the apex point.
8. Rafter : providing a base to support roof decks and roof coverings
9. Inner Haunch Bracket and Knee Brace : are provided to strengthen the
haunch connections.
10. Crossing brace : is a system utilized to reinforce building structures in which
diagonal supports intersect. Its for earthquake resistant buildings because it
helps keep a structure standing.
11. Wall girts : provide lateral support to the wall panel, primarily, to resist wind
loads.
12. Column : as a vertical structural member designed to transmit a compressive
load.
13. Foundation : distributing the load from the structure over a large base area
and then to the soil underneath.