purlins
Horizontal roof supports
Purlins are horizontal beams in a roof structure, running parallel to the ridge and supporting the rafters or roof decking.
They span between principal rafters or trusses, transferring the weight of the roof covering to the main structural supports: The old barn's purlins had rotted through.
Sloped roof beams
- joistsHorizontal building beams
- beamsRays or supports
- trussesTriangulated load-bearing frames
- battensThin fastening strips
load-bearing · span · spacing · timber · lumber · steel · C-section · supports
Installing overhead shelter material
- sheathingProtective outer layer
- claddingOuter protective layer
- metal panelsFlat fabricated alloy sections
- attachmentConnection or fondness
screws · bolts · cleats · hangers · brackets · alignment · leveling · measuring
Tree-derived building material
- steelCarbon-hardened iron alloy
- galvanizedStimulated into sudden activity
- aluminumElement thirteen
- gaugeStandard of measurement
profile · sectional · lightweight · durable · corrosion-resistant · recycled steel · dimensional lumber · composite
rafters
Sloped roof beams
battens · load-bearing · span · spacing · timber · lumber · steel · C-section · supports · framework
roofing
Installing overhead shelter material
- sheathingProtective outer layer
- claddingOuter protective layer
- metal panelsFlat fabricated alloy sections
attachment · screws · bolts · cleats · hangers · brackets · alignment · leveling · measuring · cutting
wood
Tree-derived building material
- steelCarbon-hardened iron alloy
- galvanizedStimulated into sudden activity
- aluminumElement thirteen
gauge · profile · sectional · lightweight · durable · corrosion-resistant · recycled steel · dimensional lumber · composite