40 Construction Grade Lumber Vs 2 Update

Some fence companies will charge you a higher price for 1 grade western red cedar but will install 2 grade western red cedar instead or worse a type of wood that is not western red cedar in order to make a higher profit while hoping that you won t be able to tell the difference.
Construction grade lumber vs 2. Construction grade lumber is used for light framing. Occasionally you may run into a fifth grade called c plugged each sheet will have two grades such as ac. Pressure treated lumber is divided into two grades 1 and 2 based on the appearance and composition of the wood. The following table is structural lumber wood engineering properties.
Construction lumber is the basic wood material you use to build stuff from walls to sheds to doghouses. Lumber of this grade contains few defects but knots are allowed of any quality as long as they are well spaced and do not exceed the size regulations. Knots must be sound firm encased and tight. 2 lumber is the most common grade for framing.
Sometimes called dimensional lumber construction lumber generally includes boards that are 2 to 4 inches thick and 2 to 12 inches wide it also comes in a few different grades and in several wood species for some projects you might not pay much attention to the grade or wood type but you. Knots must be sound firm encased and tight. Unlike appearance grade pine lumber construction grade pine lumber is unlikely to exceed its minimum requirements. In the united states there are four basic softwood construction plywood veneer grades you need to worry about.
The first letter is the face veneer grade and the second is for the back veneer. The construction grade limit knots from two thirds to one half the width of the board depending on the type. 1 lumber is usually used for applications where appearance matters while 2 lumber is used where it will not be. 2 lumber also called standard has a rougher knottier look.
There are limits on most of the defects with the exception of some. 3 and stud construction standard utility. For nonstress lumber pieces a common example being the 2 by which is less than 2 thick and greater than nominal 2 in width the grades are shown in table 2 below. 1 lumber also called premium is the higher grade with very few knots warps or other blemishes.
5 4 wood decking is graded for both strength and appearance and is available in premium and standard grades. Lumber grades for common nonstress graded lumber. Prime grade lumber provides the same structural properties as 1 grade lumber but has fewer knots and better appearance 2 prime grade has the strength of 2 grade lumber but will look better with fewer knots. Extreme fiber stress in bending f b psi tension parallel to grain f t horizontal shear f v.
Modulus of elasticity of wood wood engineering design data and elastic ratios.