Drywall anchors should be placed no more than 16" apart. On a 20 foot wall you should place approximately 15 drywall anchors.
You should never anchor a wall arm like this into just drywall. It is very dangerous. You will need to find a wall stud under the drywall to anchor this into.
A quality drywall anchor depends on the merchant you purchased it from. Sometimes the cheaper they are, the worse they are. Don't be afraid to spend a little more money for quality.
Drywall anchors are small devices used to hold heavier items you plan on placing upon walls, especially if you don't plan on using the studs. You typically drill a hole where you plan to mount whatever it is you're mounting, screw the drywall anchor in, and then place the screw inside the anchor. The drywall anchor will hold tight to the wall so things don't fall or ruin your wall.
If there's any question about whether or not a drywall anchor will hold on the ceiling, the best thing to do would be to find a ceiling joist and use a long screw to go into solid wood. (Use a stud finder to locate the joist.) Hanging on a ceiling is more dangerous than hanging on a wall since things that fall can fall on people or pets. If you HAVE to hang just in drywall, use the strongest anchor you can get (i.e. one that expands like a butterfly after insertion, or the type that flares out like a flower when you tighten it). Your local hardware store can help with what's a reasonable weight limit.
Yes, that's the exact purpose they were made for. -If you want an even better anchor, use E-Z Ancor, available in Home Depot.
If you are attaching it to drywall, use plastic anchors with the screws. The anchor expands while the screw is being installed and helps hold the fixture firmer to the wall. If the fixture is kind of heavy, use a "butterfly" anchor (the hardware store clerk will know what you want). Butterfly anchors open up like a butterfly's wings behind the wall as you insert the screw.
If the drywall is directly onto the concrete, drill into the concrete and use a shield and screw or there is a concrete screw called Tapcon that screws directly into the concrete without a shield and holds much better. If the drywall is on furring strips, either mount the banister on the strips or go through the strips into the concrete.
Question is unclear. A double sink can use one drain, you would anchor the base to the wall the same as a single sink and the vanity is on top or in front of the drywall. If you are replacing a single sink with a double, the supply and drain could be in the vanity, you would not have to open up the wall.
It depends on the application. Toggler makes SnapToggle bolts that hold up to several hundred pounds per anchor, provided there is a big-enough space behind the drywall to install them. These are about the most durable and highest test load you can find. Other anchors (Toggler SnapSkru and others) will hold a bit less but don't require as large of a channel behind the wall.
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The cast of Business World News - 2003 includes: Mark Bedor as Anchor Debbie Dujanovic as Anchor James Earl Jones as Spokesperson Penny Griego as Anchor Kyla Grogan as Anchor Joyce Harvey as Anchor Amy Hendel as Anchor Marti Johnson as Anchor Mark Kriski as Anchor Mario Machado as Anchor Berit Mason as Anchor Norm McBride as Anchor Lynette Romero as Anchor Karina Rusk as Anchor Tamara Taggart as Anchor Teresa Tanoos as Anchor
anchor is a noun and a verb.noun - Throw the anchor over now.verb - We will anchor here for the night.