Roofs (Leaving Cert Construction Studies): Flashcards
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10 cards from this deck
Truss roof definition
Truss roof definition
Prefabricated pitched roof frames made in factory
What is each triangular frame called?
What is each triangular frame called?
A truss
What are struts in a truss?
What are struts in a truss?
Internal diagonal members that provide support
Function of ties in truss
Function of ties in truss
Maintain triangular shape & prevent spreading
What are gang nail plates?
What are gang nail plates?
Metal plates with teeth pressed into timber joints
Force experienced by ties
Force experienced by ties
Tension - pulled apart under load
Purpose of diagonal bracing
Purpose of diagonal bracing
Prevent roof from racking under wind loads
Galvanised steel strap specs
Galvanised steel strap specs
30 x 5mm, max 2m centres
Max gable ladder overhang
Max gable ladder overhang
300mm beyond gable wall
Advantage of truss roofs
Advantage of truss roofs
Uses less timber & no load-bearing internal walls needed