The us span book for major lumber species

The dust jacket for hard covers may not be included. Wood joists were also used in oldstyle timber framing. Pricing for span tables and design values for joists and. This book provides a convenient reference for spans for common species of canadian and u. This code book has one appendix with span tables for joists and rafters and. When looking at the tables for floor joists and rafters1. Each piece of lumber is inspected to determine its grade. A book that has been read but is in good condition. The thickness of s1s lumber is subject to contract agreement. Span book for major lumber species from the canadian wood council. To some woodworkers, cedar ranks high as the wood of choice for building decks.

The listed reference design values are for visually graded. Wwpa lumber species and grades linkedin slideshare. Structural lumber overview many western species share similar performance properties and are grown, harvested and manufactured together. Personally, i would never go beyond a 16 span for a 2x10, but is allowed on certain types of species. Span tables for canadian dimension lumber and gluedlaminated timber, 2009, canadian wood council, 09783232, 97809783238, canadian. More than 21 commercially important softwood species are native to the west. History of the lumber industry in the united states wikipedia.

The span book is a supplement to the wood joist, rafter and beam spans found in the national building code of canada. Chapter 6 commercial lumber, round timbers, and ties standard dimensions standard lengths of hardwood lumber are in 305mm 1ft increments from 1. This code book has one appendix with span tables for joists and rafters and another with design values for joists and rafters. Quartersawn white oak is the highest volume species produced by frank miller lumber, yet supply can vary a great deal over the course of a year due to demand fluctuations. Grades and sizes of canadian dimension lumber are identical to those in use throughout the us and conform to all applicable requirements of american softwood lumber standard ps 2094. Tables in the span book and the national building code were both generated by the canadian wood council. Maple is used for flooring, furniture, millwork, veneer, and pulpwood. Today its range extends throughout much of the southern united states. Black walnut trees commonly reach heights of 100 or more with 3diameter trunks, yielding copious amounts of consistent, straight graina lumbermans dream. This book is intended for use in structures where the moisture content in use. Span book for major lumber species major species combinations canadian u. Click here for background information regarding design values. Changes include new design values for coast sitka spruce and yellow cedar and updates to northern species design values. Span tables for joists and rafters, 2005 edition updates the 1993 edition below and provides a simplified system for determining allowable joist and rafter spans for typical loads encountered in one and twofamily dwellings.

Standard thickness values for hardwood lumber, rough and surfaced on two sides s2s, are given in table 64. A joist is a horizontal structural member used in framing to span an open space, often between. A tutorial for using the span tables is also available. Wood frame construction relies on the lumber design values and allowable span tables published in building codes and standards, and industry technical publications. The span tables listed here are based upon design values for visually graded southern pine dimension lumber that became effective june 1, 20. Osage orange was native to a small area of droughtridden, windswept prairie in texas and arkansas. The following are basic guidelines to follow when specifying quartersawn white oak for flooring, millwork, furniture and cabinetry. If the wood came from a wood pile or a lumber mill where all the pieces were from trees processed locally, then the potential species are immediately limited. Span charts allowable spans for spruce, pine and fir. The majority of pages are undamaged with minimal creasing or tearing, minimal pencil underlining of text, no highlighting of text, no writing in margins.

Changes include new design values for southern pine and. At 16 inch spacing, 15 feet 2 inches and feet 3 inches at 24 inch spacing. Use a joist span table such as those found in the resources section to determine the maximum 2by10. These spans relate to products manufactured from u.

It is important to realize that the way you select and use materials will control costs and. The national building code references the span book as follows. A stamp is applied indicating the assigned mill of origin, a green or dry moisture content at the time of manufacture, the species or species group, and the grading authority with. Design values and span tables for western lumber along with supporting. Dimensional stability southern pine dimension lumber 2. These products are marked as a species combination to simplify marketing, design and engineering and allow design values to be assigned under a group rather than as individual species. Students came in this morning to a decorated hallway. Major lumber company was established in 1896 by reuben h. If the wood came from a builder of antique furniture, or a boatbuilder, or a trim carpenter. There are others available depending on the species of the wood being used and the type of floor construction that may increase the dead load above the 10 psf that these tables indicate. Dimension lumber in canada must conform to grading rules meeting canadian and u. Understanding loads and using span tables building and.

The canadian wood council cwc building codes, products. Design values for western softwood structural lumber are computed in accordance with astm standards based on clearwood tests or on tests of fullsize pieces in specific grades, conducted in cooperation with the usda forest products laboratory. Presently there is a healthy lumber economy in the united states, directly employing about 500,000 people in three industries. Softwoods have been exported from the united states for over 400 years. Species groups paperback january 1, 1999 by canadian wood council author. In the midwest with snow, what would be the norm for a rafter go cubs. May 11, 2010 there are others available depending on the species of the wood being used and the type of floor construction that may increase the dead load above the 10 psf that these tables indicate.

Spaced at 12 inches, the joist may only span 16 feet 8 inches. Span book for major lumber species major species combinations. What is the difference between psf dead and psf live. Very minimal damage to the cover including scuff marks, but no holes or tears. These forests are in close proximity to hundreds of southern pine lumber manufacturing facilities, offering ready availability to major markets. Check sources of supply for available grades and sizes, and for lumber longer than 20 feet. I received the free lumber span book that i mentioned in an earlier post the us span book for major lumber species 2002 edition. The species database will help you choose the most suitable wood species for your project.

Wood handbookchapter 6lumber stress grades and design. Osage orange, a novel species with a bright yellowishorange heartwood, is one of the finest examples of an exotic domestic, one that may actually grow in your own backyard. Read, highlight, and take notes, across web, tablet, and phone. Originally the business was located on the south bank of the little platte river near the old patterson mill. Spans shown in the western lumber span tables and the product use manual were calculated using western lumber base values as published in wwpas western lumber grading rules. Span book for major lumber species maximum allowable span. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2. Canadian wood council, 1997 building, wooden 160 pages. The simple cell structure of softwoods long, uniformly packed fibers gives them a high strengthtoweight ratio, making them flexible and capable of bearing heavy loads. National association manufacturers of cdn wood products.

Today, america is recognized worldwide as a sustainable source of top quality products. In my view the only problem with treated lumber outside is the chicken littles who hate chemicals and want to save the world for the insects. Most commercial softwood species manufactured in the united states are stress graded under american lumber. A companion supplement to span tables for joists and rafters, design values for joists and rafters tabulates allowable bending fb and modulus of elasticity e design values for visually graded and mechanically graded dimension lumber this edition has been updated to the 2015 nds design values supplement. The veneer is prized from this tree for the special patterns it makes such as birdseye, fiddleback, and curly maple. Accredited ruleswriting and independent agencies are listed in table 61. History of the lumber industry in the united states. Species combinations, assigned stress values and spans tabulated herein have been developed in strict accordance with the applicable american standards. It was one of the two lumber yards owned by reuben major and his brother, weeden major. Span tables for joists and rafters 3 american wood council table 9. Western species and are not appropriate for use with products manufactured from species imported from other countries. Duration of load c d tablulated design values are for normal load duration. I received the free lumber span book that i mentioned in an earlier postthe us span book for major lumber species 2002 edition.