Once you ve calculated the number of trusses you will need you should purchase the lumber.
Roof studs distance between for concreete roof.
The studs in most framed homes are positioned between 16 or 24 inches apart.
The trusses should be a little longer than the exact width to allow for overhang and you will need sufficient trusses to mount across the length.
However joints in the concrete deck need to be addressed for air control layer continuity.
Studs usually consist of 1 5 by 3 5 inches 38 mm 89 mm or 1 5 in 5 5 in 38 mm 140 mm lumber and are commonly spaced at 16 in 410 mm on center.
For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers.
Most roofs utilize 16 inch spacings for strength and rigidity.
Putting the trusses into place.
This spacing may be changed to 12 or 24 in 300 or 610 mm on center depending on the load and the limitations imposed by the type and thickness of the wall covering used.
Now the width of each stud for homes built before 1965 is usually 2 inches wide.
A habitable attic assembly supported by 2 4 studs is limited to a roof span of 32 feet.
The same concept holds true for roof trusses.
A concrete roof is exactly what it sounds like.
While a 5 12 pitch roof is the standard if you are going to save money by spacing your studs at 24 inches a 7 12 roof pitch will fortify your walls to a greater extent than a 22 62 degree roof pitch.
A truss is one contiguous double rafter ceiling joist unit.
If your local building authority has a rafter spacing code you may not space rafters wider than required by code.
Notice the use.
A solid slab of concrete capping the top of your house.
The balloon framed steel stud parapet this is the ugliest parapet to get right.
The roof pitch that provides the greatest amount of tensile strength for your walls is 30 degree i e a 7 12 pitch roof.
For some of the more modern homes the distance between studs can be around 14 5 inches.
Like wall studs and floor joists rafters and trusses are spaced every 16 or 24 inches from center to center.
The masonry parapet the thing to note here is that the concrete deck is the air control layer so an additional one is not necessary.
Exact specifications vary but most concrete roofs are several inches thick.
Common spacing for trusses on this type of building is often between 2 and 4 feet but trusses built with advanced designs may allow spacing as great as 8 or 12 feet.
Homes that were built after 1965 usually have studs with a width of 1 5 inches.
The rafters are usually positioned directly above the wall studs.
Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches.