what is the weight of southern pine (lumber) per ? (board feet ?)?
824189
While it is very true the percentage of moisture will determine the weight ( usually kiln dried is dried to 19%) the species shortleaf, longleaf, loblolly or slash will also weigh in on the ppbf.  Unfortunantly there is not a, "it weighs 9 oz. per board foot answer.  You might want to go to www.southerpine.com to find out more.
16259
Depends on what you want to be doing with the board. If you're just beginning, a medium sized board might be your best option. Something that comes upto your nose probably. Try a 167 board or so. Though I assure you when you buy a board, someone can give you more specific help on that, and it's best to go to a store and talk to someone, to find the right amount of flexibility for your weight, etc
903030
My skateboard weighs 3.5 kilograms- I just weighed it. Standard double nose deck, independent trucks, Simms 94A wheels, no risers.
334318
I did a web search and there was a site that had the standards. If you Google "medium density fiberboard" one of the results will be a "panelsource.net" site with a PDF that I believe addresses your question.
1176375
Whole bunch of links here\nhttp://www.lumber.org/links/
701729
4 ton or 8000 pound US the inhabitants of Seymour, Wisconsin\n\nRead the story: whoops
282424
Jade,\n\nI'll tackle the second part of your question, since the first part has already been addressed with several different choices. \n\nYou can also find out more right here on Y!Answers by doing a search for "Janka scale" because several questions have addressed wood hardness in various ways.\n\nNow for the "why don't they use it for building?"\n\nOpinion only, but I think the simple answer is cost. A secondary answer would be the difficulty of working with it.\n\nWe're talking about woods that are roughly three times harder than oak. Wood from trees that do not grow very large in girth. A 12" tree, quarter sawn, would at best produce only a few boards. Those boards would break or wear out the standard tools that a carpenter works with very quickly.\n\nAll woods are being used less in construction except for decorative elements. In the US, which still depends on on-site stick & nail construction more than Europe, wooden elements are being replaced with wood composites and other materials that replace the traditional beams, studs and flooring. Cost, availability (at a reasonable price), and the ability to be easily worked with.\n\nLook in new home construction. Basement -- wood composite I-beams. Living area -- drywall on steel studs, "hardwood" floors that are a composite wood base with a thin laminate and a coat of plastic over it.\n\nNow where they have "real" wood, it's featured! Mantles, moldings, trim, architectural elements -- and it raises the price of the house.\n\nWe're not short of trees. We're short of *old-growth* trees. Trees are farmed now, and the trees of choice are fast-growing softwoods. \n\nWhere there are hardwoods, the furniture makers and musical instrument makers are willing to bid more for them than the construction industry.\n\nHope that helps with the second part of your question.
565159
20 vertical and 20 horizontal  then fix them on each other using tacks with add separating material .. then u will have 10 wood left left .. put two of them over each other in each side .. so u will have two left .. to keep u move easily in the sea .. :D .. good luck .. nice Q
909922
enjois are china wood too. a lot of decks are produced in the states tho. dunno which ones for sure. just do a search i guess.
408499
20 pounds per square inch
27626
3/4" Marine plywood: (shaped to taste hehehe!) add a little rocker....cover with marine epoxy...sand till smooth... paint.. whalla!!\nthen shuvit shuvit shuvit!!!!\n\n- good for flat water skimboarding! hikhikhik!!
405919
http://en.wikipedia.org/wiki/Hundred_weight
237010
Try buying a copy, try a local structural design firm, try a local engineering school, try a local library.\n\nIf you know enough to use the load factors, you should know enough to find them.
550176
I'd say about 200-250 pounds...
423792
www.epb.com.pk\nwww.kse.com.pk\nIknow one of these websites have info on export weight.\nOr search google for karachi port trust.
346454
Lineal feet, same as linear feet, means feet in a straight line.\n\nYou'll need to just multiply the linear feet by the width of the board to get square feet.\n\nIf you have 10 linear feet of wood, and the wood is 1 foot wide, you have 10 X 1 = 10 square feet of wood.\n\nso for your calculation its 4*13 = 52 square feet. (12" in 1') but 13 lineal feet
110767
Yes, a pretty minimal effort at writing a question, but for what it's worth:\nUse cross bracing (making triangles) to make structure stronger.\nUse an adequate glue that really wets the wood, and lap or splint joints not simple butt joints.\nGet more strength from each stick by having as many as possible edge-down not face-down.