The size of the anchor you need will depend on the size of the hole you're drilling. For example, if you used a 6 mm drill bit, you should use the same size anchor. The screws you use should then have a slightly smaller diameter of around 4–5 mm, which is opposite to if you're not using anchors (see 1.2).
One of the primary factors in determining anchor size is the size of your boat. It's important to remember that larger boats require larger anchors to provide sufficient holding power. As a general rule of thumb, the anchor should weigh at least 1/10th of the boat's weight.
Anchors are sized for the screw they take. Or take your screw to a real hardware store, and tell them what you have, what you're trying to do, and buy what they tell you you need.
It's based on the diameter of the screw - not the length. You just need to find a drywall anchor that the screw will fit into - and the anchor only needs to be slightly smaller than the diameter of the screw....
The size of the anchor you need will depend on the size of the hole you're drilling. For example, if you used a 6 mm drill bit, you should use the same size anchor. The screws you use should then have a slightly smaller diameter of around 4–5 mm, which is opposite to if you're not using anchors (see 1.2).
The easiest way is to use a Bit Sizer, which is a simple and inexpensive plastic measuring device that slides into the horse's mouth. Inch increments correspond directly to bit sizes, and you take the reading just as you would using a ruler.
There's a limit as to how heavy a wall anchor can support. As mentioned above, plastic anchors are best for lightweight items while zinc or metal anchors are ideal for heavier items. Most wall anchors have specified weight ratings such as the Snap Skru Anchor, Zinc Drywall Anchor, and the Snap Toggle Anchor.
It is important to consider the consequences of using an anchor that is too big for your boat. In addition to being inconvenient and potentially damaging to your windlass and pulpit, it can also be unsafe.
Toggler SNAPTOGGLE (Best Overall)
This anchor held strong at 180 lbs., and we couldn't turn the turnbuckle any more.
While drywall alone can hold about 1.6 pounds to 2 pounds per square foot, mounting an object to the stud with the proper hardware allows the drywall to support up to 100 pounds.
Drywall anchors aren't required for all wall-based fastening applications. If there's a stud directly behind the wall, for instance, you probably won't need to use them. Studs offer support for screws as well as the objects with which they are used. Of course, studs don't encompass the entire space of a given wall.
Calculating length: a rule of thumb
Simple equation The most basic equation is: wind speed + boat length = chain length. This works for anchorages up to around 10m. Beyond that depth, calculate 1.5 times wind speed instead.
Interior braced wall plates shall have anchor bolts spaced at not more than 6 feet (1829 mm) on center and located within 12 inches (305 mm) of the ends of each plate section where supported on a continuous foundation.
The bolt or screw length is determined by adding the thickness of the material to be fastened- plus any washers- plus the number of threads in the anchor and the embedment of the anchor into the concrete.
Your first task in choosing an anchor is to have an understanding of three things: Your Boat - Your boats' size, weight and design characteristics affect what kind of anchor you will need to use. For instance, a 30 foot 10,000 pound houseboat needs a larger anchor than a 30 foot 6000 pound speedboat.
Never anchor from the stern as this can cause the boat to swamp. The square stern may be hit by waves, and water will splash into the boat. The motor's weight will add to this problem.
Larger anchors that accept bigger screws are generally more secure.
The length parameter equivalent for drywall anchors would be the thickness of drywall they are made for. Since different types secure in different ways the overall length will vary but the thickness of drywall for which they are effective will be the same.
You definitely want to hit a stud for heavy-duty loads like a TV bracket, a handrail, or a grab bar. Hollow wall anchors won't cut it. And for that, you first need to find the studs.
Generally, these anchors can require a drill bit size in the range of 1/8 inch to 1/4 inch. While the range is broad, toggle bolt drywall anchors come in various sizes, as they are designed to hold some of the heaviest items you can secure in drywall.
The perfect bit is within reach
When adjusted correctly, it should rest on the toothless part of the mandible so that the corners of the mouth are slightly wrinkled. Another important criterion for choosing a mouthpiece is its length.
Click the Start menu. Type system into the search box and select System from the Programs list without pressing ENTER right away. The System type under System will tell you your operating system's bit version.