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  2. Reciprocal frame - Wikipedia

    en.wikipedia.org/wiki/Reciprocal_frame

    The first rafter is fitted between the wall and the temporary central support and then further rafters are added, each resting on the last. The final rafter fits on top of the previous rafter and under the very first one. The rafters are then tied before the temporary support is removed.

  3. Rafter - Wikipedia

    en.wikipedia.org/wiki/Rafter

    Compass rafter: A rafter curved or bowed on the top (the top surface of a rafter is called its "back") or both the top and bottom surfaces. Curb rafter: The upper rafters in a curb (kerb, gambrel, Mansard roof) roof. Hip rafter (angle rafter): The rafter in the corners of a hip roof. The foot of a hip rafter lands on a dragon beam.

  4. Birdsmouth joint - Wikipedia

    en.wikipedia.org/wiki/Birdsmouth_joint

    A birds-mouth joint in a rafter, set upon a double top plate. Shown are the two cuts of the joint: the seat cut and the heel cut. In light frame construction, a birdsmouth joint or bird's beak cut is a woodworking joint that is generally used to connect a roof rafter to the top plate of a supporting wall. [1]

  5. Timber roof truss - Wikipedia

    en.wikipedia.org/wiki/Timber_roof_truss

    Timber roof truss example. The top members of a truss are known generically as the top chord, bottom members as the bottom chord, and the interior members as webs.In historic carpentry the top chords are often called rafters, and the bottom chord is often referred to as a tie beam.

  6. Lookout (architecture) - Wikipedia

    en.wikipedia.org/wiki/Lookout_(architecture)

    A lookout, [1] lookout rafter or roof outlooker [2] is a wooden joist that extends in cantilever out from the exterior wall (or wall plate) of a building, supporting the roof sheathing and providing a nailing surface for the fascia boards. When not exposed it serves to fasten the finish materials of the eaves.

  7. Engineering, procurement, and construction - Wikipedia

    en.wikipedia.org/wiki/Engineering,_procurement...

    Engineering, procurement, and construction (EPC) contracts (a type of turnkey contract) are a form of contract used to undertake construction works by the private sector on large-scale and complex infrastructure projects. [1] They may follow a Front-End Engineering and Design (FEED) contract.

  8. Domestic roof construction - Wikipedia

    en.wikipedia.org/wiki/Domestic_roof_construction

    The top ends of the rafters often meet at a ridge beam, but may butt directly to another rafter to form a pair of rafters called a couple. Depending on the roof covering material, either horizontal laths , battens , or purlins are fixed to the rafters; or boards, plywood , or oriented strand board form the roof deck (also called the sheeting or ...

  9. Early contractor involvement - Wikipedia

    en.wikipedia.org/wiki/Early_contractor_involvement

    In traditional construction contracts (known as design–bid–build contracts) the principal contractor is only engaged when a detailed design is complete. An invitation to tender is published and a number of contractors will price the construction of the design, from which a single winner will be chosen to complete the works. Contractors are ...

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