Timber members spanning over trusses to support cladding or between trusses to support loose timbers.
The horizontal roof members on which the rafters rest.
The horizontal components of a roof structure used to support and attach roof panels.
The horizontal members of the roof structure used to support and attach the roof panels.
"A roof construction in which [pieces of timber] are laid between the principal rafters; they support the boards that run between the ridge and eaves of the roof." (Harris, 729) Purlins help support the roofing material. In Craftsman architecture, the purlins frequently project from the wall into the eaves.
Horizontal structure spanning between beams to support a roof deck.
Purlins are metal tracks used to support metal roofs or siding. Purlins can also mean the members placed at right angles to rafters to break up the roof board span. RACKING A misshaping of a frame caused when horizontal loads applied to vertical boards displace the frame from its rectangular position.
A horizontal timber used between timber rafters, or sometimes a decorative beam above floor beams.
Horizontal beam along the length of a roof, resting on principals and supporting the common rafters or boards.
A roof support logs reaching from end to end of the structure and placed in line between plate log and the ridgepole. Usually, it is used to support rafters.
Horizontal timbers that connect rafter trusses. Queen Post: A pair of vertical posts of a roof truss standing on the bent plate or girt and supporting the rafters or collar tie. Rack: The action of straining or winching a frame to bring it into square or plumb.
Substantial horizontal members in a roof frame. At Ferryland they were the lowermost members surmounted by rafters (vertical) and battens.
A horizontal structural member spanning between beams or trusses to support a roof deck. In slope glazing, purlins are the horizontal framing members.