First Fix Flashcards
What is the maximum pitch of a flat roof?
10°
Why would Stirling board and marine ply be appropriate sheeting materials on a flat roof decking?
Because they have a high water resistance
What are the two common centres for joists in a flat roof?
400 and 600 centres
What are 2 ways of installing stud work?
~ Situ - building sole plate and then head and then fixing studs in.
~ Building it on the floor and then standing it up
How are joists usually installed?
Usually hung on joist hangers
Why are trusses usually centred at 600mm?
Because the plasterboard that is fixed underneath is 1200mm.
Why is a gable ladder built on a truss roof?
It provides a fixing point for the barge board at the end of the roof and the soffit underneath. Also helps provide the verge detail
Why is a gable ladder built on a truss roof?
It provides a fixing point for the barge board at the end of the roof and the soffit underneath. Also helps provide the verge detail
Why may some trusses in a roof be centred closer together than the others?
This will be due to services such as a water tank.
How many times do you nail the bracing on each truss?
Always double nail each truss.
Give 2 examples of bracing that are put onto truss roofs?
Longitudinal and diagonal bracing
What is the maximum spacing allowed for spindles according to building regs?
100mm
What is a string (stairs)
The boards at the side of the stairs, where the treads and risers are housed or cut.
What is a newel post?
A large vertical component of the stairs where the string and handrails are fixed.
Where are newel posts usually fitted?
fitted at the top and bottom of the stairs
What is a newel cap?
The shaped top of a newel post
A gable end constructed on a roof?
With a gable ladder made up on site and fixed flush to the end truss
What is the purpose of a gable ladder?
Provides a fixing point for bargeboard, soffit and fascia
How is the verge detail achieved on a truss roof?
It is provided when the bargeboard is fitted
How is the eaves detail provided on a truss roof?
It is provided with the fitting of the fascia, soffit and box end
What is the equation used to get equal spacing between spindles throughout a straight flight of stairs?
(Width between bottom and top newel post - total width of all spindles) divided by total number of spindles + 1.
What is the equation used to the find the number of spindles required in a straight flight of stairs?
( Number of treads x 2 ) - 2
