the medium through which sound travels, be it brick, steel, wood or simply air, has a great effect on the sounds behavior. additionally, sound waves can bounce off surfaces and squeeze though small openings, allowing them to travel great distances in some cases. the two most useful descriptions of sound are the sounds intensity and frequency.
sound transmission and flooring types. without anything to absorb it, sound waves can spread, multiply, and echo off the walls, amplifying even a small sound to a distracting crescendo with the right acoustics. given a large room with high ceilings and hard polished floors, a simple walk across the lobby of an office building, for example, can become quite a distraction.
in 2011, liteform introduced their own modular system. the foam components are available in eight-foot lengths and instead of integral furring strips, the new system uses locally purchased lumber. the most common profile uses conventional 2×6 lumber or a light-gauge steel beam of the same size .
climb cutting versus conventional cutting here's a close look at the difference between climb-cutting and conventional cutting on the cnc, with explanations of how each method affects the quality of cut. october 3, 2011
floor squeak sounds like a birdcall, which produces noise by metal rubbing on wood. most floor-ceiling noise problems fall into one or more of these categories although occasionally there are struc- turally transmitted sounds due to equipment, doors or ders closing, or furniture sliding along the floor.
easily through many solid objects. for example, sound waves move through air 70 f at just 1,128 feet per second but travel about 10 times faster 11,700 feet per second through wood, and faster still 18,000 feet per second through steel. therefore, designers must consider not only airborne sound, such as voices and ringing telephones
green lumber vs kiln dried green lumber construction green lumber drying time. category making floor joists with the wood mizer lt10 - duration: 18:20. fall line ridge 76,964 views.
for these sources, accurate assessment of sound transmission requires a detailed analysis in frequency bands.' caution: stc is not a measure of how many decibels of sound a wall can stop. if you have an stc 45 wall, this does not mean the wall stops 45 db of sound. caution: you cannot add stc ratings. they are logarithmic values and cannot simply be added.
pros and cons about block cmu vs wood frame . concrete block cmu better sound proofing; durability during a hurricane; a simple box one-story home could be less expensive that wood frame. not always the case with more intense design, angles and varying wall heights. some say cmu has a better fire rating however the roof and interior walls are still wood frame.
alternative framing materials in residential construction: three case studies prepared for u.s. department of housing and urban development office of policy development and research prepared by nahb research center upper marlboro, md instrument no. du100k1 july 1994
strength characteristics of i-joists relative to conventional wood framing. with respect to conventional framing 16 inches or 19.2 inches on center joist spacing , i-joists are 50 percent stiffer than solid sawn lumber. in terms of strength, for simple spans, an i-joist series with the lowest design values pri-20 can span to within inches of the strongest solid sawn lumber joist s. pine .