Roofs that have sloping ends and sides meeting at an inclined projecting angle
Ridge beam
Is a structural horizontal member supporting the upper ends of rafters at the ridge of a roof
Valley
Is intersection of two inclined roof surfaces toward which rainwater flows
Hip
Is the inclined projecting angle formed by the junction of two adjacent sloping sides of a roof
Rake
Is the inclined, usually projecting edge of a sloping roof
Pratt
Trusses that have vertical web members in compression and diagonal web members in tension
Howe
Trusses that have vertical web members in tension and diagonal web members in compression
Fink
Are Belgian trusses having sub-diagonals to reduce the length of compression web members toward the centerline of the span
Low-slope
A sloping roof up to 3:12
Collar tie
Unite two opposing rafters at a point below the ridge, usually in the upper third of the rafter length
Main rafter
Extend from a wall plate to a ridge board or ridge beam and support the sheathing and covering of a roof
Habitable attic space
Sufficient headroom, ventilation, and natural light
Flat roof
Which of the following require a continuous membrane roofing material, can efficiently cover a building of any horizontal dimension, and may be structured and designed to serve as an outdoor space?
Flat
Trusses that have parallel top and bottom chords
Dormer
Are projecting structures built out from a sloping roof and housing a vertical window or ventilation louver
Roof construction
Should also control the passage of moisture vapor, the infiltration of air, and the flow of heat and solar radiation
Roof form and slope
Must be compatible with the type of roofing used to shed rainwater and melting snow to a system of drains, gutters, and downspouts
Gambrel roof
Are divided on each side into a shallower slope above a steeper one
Warren
Trusses that have inclined web members forming a series of equilateral triangles
Space frame
A long-spanning three-dimensional plate structure based on the rigidity of the triangle and composed of linear elements subject only to axial tension or compression
Soffit
The underside of an overhanging roof eave
Ridge board
Is a nonstructural horizontal member to which the upper ends of the rafters are aligned and fastened
Knee
Are short walls supporting rafters at some intermediate position along their length
Steel truss
Are generally fabricated by welding or bolting structural angles and tees together to form the triangulated framework
Hip jack
Are jack rafters extending from a wall plate to a hip rafter
Crescent
Trusses that have both top and bottom chords curving upward from a common point at each side
Ridge
The horizontal line of intersection at the top between two sloping planes of a roof
Gable roof
They slope downward in two parts from a central ridge, so as to form a gable at each end
Roof
Primary sheltering element for the interior spaces of a building
Shed
A roof having a single slope
Tetrahedron
The simplest spatial unit of a space frame having four joints and six structural members
Bowstring
Trusses that have a curved top chord meeting a straight bottom chord at each end
Rigid frame
Consist of two column and a beam or girder that are rigidly connected at their joints