Yes, wood joists should be installed with the crown side facing up. The crown refers to the natural curve of the wood, and placing it up helps counteract potential sagging over time, ensuring a level floor. This installation method promotes better load distribution and overall structural integrity.
should wood decks be installed crown down
most all pieces of lumber will have a slight bow in it if you sight down the length of the piece. the top of this bow is often referred to as the crown of the lumber. lumber should always be positioned crown up when laying lumber horizontal such as for joists.
The size of wood used for floor joists typically ranges from 2x8 to 2x12 inches, depending on the span and load requirements of the floor.
That depends upon the size of the joists & grade/species of wood
Joists are connected to beams in various ways. All of them would involve some sort of hanger or strap made out of metal. Simpson Strong-Tie is a major manufacturer of these hangers or straps. I do not have their website handy, but it should not be too hard to find.
Joists can be supported using various methods, including traditional wood beams, steel beams, or engineered wood products such as laminated veneer lumber (LVL) or I-joists. They can also be held up by using column supports or posts that transfer the load to the foundation or floor below. Additionally, hangers can be employed to attach joists to beams or walls, providing stable support. Each option should be chosen based on the specific structural requirements and building codes.
Overloading would be one reason. Or the wood moisture content was too high when installed and it has bowed as it dried out. If this relates to old construction, there could be insect (termite) damage or rot that has weakened the member.
There are several types of floor joists commonly used in construction, including solid sawn lumber, engineered wood joists (such as I-joists and laminated veneer lumber), and steel joists. Solid sawn lumber is traditional and widely available, while engineered wood joists offer greater strength and span capabilities with less material. Steel joists are used for commercial and industrial applications due to their high load-bearing capacity and durability. Each type has its own advantages depending on the specific requirements of a building project.
Cove or crown moulding which is fitted at the junction of a wall and ceiling.
Metal deck joists offer several advantages in construction projects, including their durability, strength, and resistance to fire and pests. They are also lightweight, easy to install, and provide a stable base for flooring materials. Additionally, metal deck joists are often more cost-effective and environmentally friendly compared to traditional wood joists.
Rim Board is a specially designed component that is engineered to work in concert with wood I-joists to deliver a complete engineered wood framing solution.
The load to be supported.SpanWood speciesSpacing of joistsGrade of lumber used!By Mitchell LewisSource: page 31611th Grade Architect Book @ CTEA