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One of the most important components in homebuilding

construction is the header. When framed in a wall, headers

span the spaces above doors and windows and bear the weight

of floors, ceilings and roofs above them. They are also used

in interior walls for doorways and where more open spaces

are desired between rooms.

Depending on the bearing load above an opening, headers can

be constructed of 2x4's on up to 2x14's or microlams. In a

standard 2x4 wall these elements are doubled up with a 1/2"

spacer between them and nailed together with 16d nails on

both sides. In homebuilding, the most common size headers

are usually 2x10 or 2x12.

Most headers for doors and windows are cut 3" longer than

the width of the rough opening. In a standard wall, a 2x10

or 2x12 header is usually nailed to the top plate. Next,

2x4's are nailed to the top plate and into the ends of the

header. Next two by (2x) cripples are nailed inside these

studs and under the header. These 2x4's are cut to the

height of the door or window. If it is a window, a 2x4 sill

is nailed to the bottoms of these cripples. The cripple is

then continued below the sill to the bottom plate. This

transfers the load from above the window to the floor and

onto the foundation.

For an example, lets say we are building a header in a 2x4

wall for a 36" wide rough opening. Take 2 pieces of header

material (2x10, 2x12 etc.) and cut them to 39". This allows

for the thickness of the 2x4 cripples(3"). Next cut a piece

of 1/2" plywood slightly less than the width and length of

the header. This is to keep it from hanging into the opening

and to keep it away from framing members. Sandwich the 1/2"

plywood spacer between the header material. Make sure to

crown the 2x's with the crown up. Before nailing the header

pieces together make sure the ends and bottom are flush.

Nail together with 16d nails, 3 nails top to bottom, 16

inches on center from one end to the other.

Rough openings are usually known well in advance of the jobs

start. Headers can be built before any framing even begins.

When building headers the use of a framing nailer can make

the task go faster and save wear and tear on ones arm.

Mike Merisko (C) 2006

http://www.sawkerfs.com

Mike Merisko has been a carpenter for 26 years. Most of those years were spent in the homebuilding and remodeling industries. He was also in business as a carpentry and general contractor. While that is his forte, he also has experience in bridge building, commercial construction, and exhibit building which is how he earns his living these days. You can browse through articles by him and others at his website www.sawkerfs.com or visit his blog at www.sawkerfs.blogspot.com

Popular Brands Of DVD Writers

In recent days, DVD writers are gaining popularity along with the fact that the price of blank DVDs is going down as well. DVDs can hold a significantly larger amount of data than standard CD-Rs. Most standard DVDs hold about 4GB of data, compared to about one tenth of that for a standard CD-R. And the dual layer DVDs are 2 sided, so they have twice as much storage capacity, about 8GB. Now that the DVD writers have become affordable, even to the average household computer user, it is starting to become standard equipment with new computer systems and laptop computers. The older CD burners are now being replaced with DVD burners.

Some of the popular brands of digital writers that one can find in the market are LG, Asus, Sony, Samsung, BenQ and the list continues. These are all well-known manufacturers in the field of electronic products. Let us go through the various models these companies manufacture.

While talking about popular brands of DVD writers, the first name that comes to mind is Asus. ASUSTek Computer Incorporated is a China based company that manufactures computer motherboards, graphic cards and other computer related peripherals.

In fact, a few years back, Asus produced the finest CD ROM drives. The Asus DRW-0804P is a type among DVD Writers that has the capability of burning both DVD+R and DVD-R media at a maximum speed of 8X. One of the noteworthy features of this particular writer is that it supports a high read speed of 40X for all types of CD media.

BenQ Corporation, a Taiwanese based company that is expert in manufacturing communications, computing and consumer based electronic devices. Initially it was known as Acer Peripherals when established in 1984. The DVD writer model that BenQ launched is DW1625. It uses a technology that was formerly developed by HP called LightScribe. With the help of this technology one can burn a CD or DVD, rotate it above, and burn the cover or can perform any other artwork on the label side of the disc.

Sony Corporation, one of the electronic giant in the field of electronics, manufactures video, communication, and information technology products is equally successful in making DVD writers. The look of Sony DRU-700A is white and the front plate is translucent blue in colour. It is capable of burning both D.V.D+R and D.V.D-R at a maximum speed of 8X i.e., 10,800 KBps.

Since this D.V.D writer has Dual layer the maximum speed for burning, reading C.Ds henceforth is 40X max, and the same can be rewritten at 24X. This dual layer technology is a hi-tech development that focuses light to mark or spot areas on two dye surfaces that are divided through a spacer layer. Each dye surface sits through reflective material, which sends the light back to the optical pickup lens. This results in interpreting the signal.

With so many brands in the market, it seems that DVD writers are gradually making their presence felt. Technology changes rapidly, however, and what is the standard today will again be a thing of the past in a decade.

About the Author

Victor Epand is an expert consultant for used DVDs, used movies, and used car stereos. You can find the best marketplace for used DVDs, used movies, and used car stereos at these sites for DVD writers, speed, used movies, and used car stereos.

Electrochemistry?

During reconstruction of the Statue of Liberty, Teflon spacers were placed between the iron skeleton and the copper plates that cover the outside. What purpose do these spacers serve?

a. to strengthen the copper
b. to act as a rain shield
c. to reflect heat from the copper
d. to prevent birds from flying into the copper
e. to prevent the iron from contacting the copper and forming a circuit that can lead to corrosion.

I would suspect the answer to be E.

yeah its E

a steel pan of lasagna with aluminum foil on it is a battery

Cyfac...
Cyfac have grown in recognition in the US since our review 5 years ago, but when people pretty frequently ask me about high end custom carbon, I still need to explain to a few, where to look for examples of the company craft.

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