[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
(TFT) Relative strength
Michael Taylor wrote . . . April 6, 2001
Here's a question that might get some activity going.
I'm designing a construction system for TFT. We know
that a dungeon door is ST 30 from ITL:40. So where could
I find how the relative densities of other materials
(stone, steel, iron, titanium) to find out the ST of
other mateirals? I've taken a guess, but I wonder if
anyone knows how to find the 'real' information?
What is material density 'called'?
Michael,
Sorry it took so long to get to this. Below is some info on wood. Its
structural capacity, in kilograms, and the damage it takes to hack through
it with an axe. As far as the technical term for 'material density', there
are so many it would constitue a thread unto itself. Tension ST, Tensil ST,
Absolute Tensil, Bend, reverse bend, Torc, Axial, Corrosive, Reflective, the
list goes on and on and on. There are modifiers for humidity, age,
repetition, laquer, enamals, acidity of air, acidity or rain. Anyway . . .
Here is a digested and converted to TFT version.
The numbers listed below are the strength of the wood under
compression, or how much weight it can hold. To attack the wood just to
break through, like a door (average 2.5cm thick), one only needs to do
1/40th the damage. This table also assumes that the wood is dry (about 12
percent moisture) any more and it will be easier to break. Wood that is
suffering from 35-90 percent moisture will be half as strong.
Remember the average door is about 2.5cm thick. This gives an Oak door
about 30 ST.
Commercial and Botanical Compression perpendicular to dmg to hack
name of wood species grain fiber in Kg per Sq cm through 1cm
Alder, red (Alnus rubra) 185 4
Ash, black (Fraxinus nigra) 321 8
Ash, commercial white (Fraxinus sp.) 515 13
Ash, Oregon (Fraxinus oregona) 526 13
Aspen (Populus tremuloides) 157 4
Basswood (Tilia glabra) 154 4
Beech (Fagus grandifolia) 427 11
Birch (Betula sp.) 427 11
Birch, paper (Betula papyrifera) 253 6
Butternut (Juglans cinera) 195 5
Cedar, Alaska (Chamaecyparis nookatensis) 263 7
Cedar, eastern red (Juniperus virginiana) 390 8
Cedar, incense (Libocedrus decurrens) 249 6
Cedar, northern white (Thuja occidentalis) 130 3
Cedar, Port Orford (Chamaecyparis lawsoniana) 260 7
Cedar, southern white (Chamaecyparis thyoides) 171 4
Cedar, western red (Thuja plicata) 208 5
Cherry, black (Prunus serotina) 290 7
Chestnut (Castanea dentata) 260 7
Cottonwood, eastern (Populus deltoides) 161 4
Cottonwood, northern black (Populus
trichocarpa hastata) 126 3
Cypress, southern (Taxodium distichum) 308 8
Douglas fir (cost region) (Pseudotsuga
taxifolia) 311 8
Douglas fir ("Inland Empire" region)
(Pseudotsuga taxifolia) 325 8
Douglas fir (Rocky Mountain region)
(Pseudotsuga taxifolia) 280 7
Elm, American (Ulmus americana) 290 7
Elm, rock (Ulmus racemosa) 519 13
Elm, slippery (Ulmus fulva) 345 9
Fir, balsam (Abies balsamea) 130 3
Fir, commercial white (Abies sp.) 208 5
Gum, black (Nyssa sylvatica) 393 10
Gum, red (Liquidambar styraciflua) 294 7
Gum, tupelo (Nyssa aquatica) 366 9
Hackberry (Celtis occidentalis) 376 9
Hemlock, eastern (Tsuga canadensis) 273 7
Hemlock, western (Tsuga hetrophylla) 232 6
Hickory, pecan (Hicoria sp.) 697 17
Hickory, true (Hicoria sp.) 789 20
Honey locust (Gleditsia triacanthos) 779 19
Larch, western (Larix occidentalis) 369 9
Locust, black (Robinia pseudoacacia) 772 19
Magnolia, cucumber (Magnolia acuminata) 242 6
Magnolia, evergreen (Magnolia grandiflora) 362 9
Maple, bigleaf (Acer macrophyllum) 318 8
Maple, black (Acer nigrum) 427 11
Maple, red (Acer rubrum) 424 11
Maple, silver (Acer saccharinum) 311 8
Maple, sugar (Acer saccharum) 618 15
Oak red (Quercus sp.) 431 11
Oak, white (Quercus sp.) 482 12
Pine, lodgepole (Pinus contorta) 256 6
Pine, northern white (Pinus strobus) 188 5
Pine, Norway (Pinus resinosa) 284 7
Pine, ponderosa (Pinus ponderosa) 253 6
Pines, southern yellow:
Loblolly (Pinus taeda) 335 8
Longleaf (Pinus palustris) 407 10
Shortleaf (Pinus echinata) 342 9
Pine, sugar (Pinus lambertiana) 202 5
Pine, western white (Pinus monticola) 185 5
Poplar, yellow (Liriodendron tulipifera) 198 5
Redwood (virgin) (Sequoia sempervirens) 294 7
Spruce, eastern (Picea sp.) 202 5
Spruce, Englemann (Picea engelmannii) 219 5
Spruce, Sitka (Picea sitchensis) 243 6
Sugarberry (Celtis laevigata) 424 11
Sycamore (Platanus occidentalis) 294 7
Tamarac (Larix laricina) 338 8
Walnut, black (Juglanus nigra) 427 11
Numbers converted to Metric from the original reference: Handbook of
Engineering Fundamentals, Prepared by a Staff of Specialist Under the
Editorship of Ovid W. Eshbach, (C) 1936 by John Wiley & Sons Inc.
David Michael Grouchy II
_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com
=====
Post to the entire list by writing to tft@brainiac.com.
Unsubscribe by mailing to majordomo@brainiac.com with the message body
"unsubscribe tft"