Wind Uplift On Roof Joists

When building a structure it is important to calculate wind load to ensure that the structure can withstand high winds especially if the building is located in an area known for inclement weather.

Wind uplift on roof joists.

6 design of steel joist roofs to resist uplift loads. The customary truss to bearing connection of three toenails may not develop enough resistance for the calculated uplift reaction. Tb 813 trus joist tji joist residential bonus room span tables. New uplift loads can induce stress reversals in tji roof joists as well as uplift reactions at bearing locations.

In order for a structure to be sound and secure the foundation roof and walls must be strong and wind resistant. Topics for discussion design responsibility what is a standard joist. Roof trusses can be found in the commentary for asce 7 as examples of both mwfrs and c c. Tb 310 use of topical coatings with weyerhaeuser engineered wood products.

Design of steel joists and roof decks michael r. Tb 827 wall tension tie connectors for tji joists. Uplift bridging is required whenever the bottom chord goes into compression. See the sji code of standard practice for additional information.

Under typical gravity loading a joist experiences compression stress in the top flange. When is uplift bridging needed. The technical bulletin below explains the design considerations such as bottom flange bracing and uplift connections at bearing. These uplift loads may result in stress reversals in tji roof joists and uplift reactions at bearing locations.

The steel joist institute discusses the key points of technical digest no. By providing a complete load diagram to the manufacturer. Assumptions dimensions designations joist design for wind uplift properly specifying uplift joist design by manufacturer for. Topics include the design requirements of the asce sei 7 10 wind provisions for open web steel joists and joist girders and the end anchorage and bridging considerations for uplift loads on steel joists.

Tb 125 wind uplift design for trus joist tji roof joists. Tb 125 wind uplift design for trus joist tji roof joists. Tb 824 trus joist tji joists in ceiling applications. How should seismic and wind loads be specified.

Tb 805 tji joists in rafter. This will be true if there are net concentrated up loads.