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portal frame Syllabification: por·tal frame

Definition of portal frame in English:


A rigid structural frame consisting essentially of two uprights connected at the top by a third member.
Example sentences
  • The structure is essentially three column portal frames that carry longitudinal channels, which bear purlins at 2m centres.
  • The design is an elegant, spaceship-like pod of laminated structural timber portal frames clad in aluminium panels.
  • The box is supported on steel portal frames, and from these are propped frames that provide the spaces for the cafeteria and the main dual restaurant space.
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