![]() Typically constructed from materials that offer enhanced fire resistance, larger spandrel areas can help resist the external spread of fire.Īlthough protection of the linear opening between a non-rated exterior curtain wall and a rated floor slab is a requirement in the IBC building code, the protection against vertical fire spread via leap-frog flame propagation is not currently addressed. ![]() The term spandrel refers to the space between the top of the window on one floor and the sill of the window in the story above. ![]() Design factors can contribute to vertical fire spread when a building’s curtain wall construction design does not specify adequate spandrel height protection.
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