![]() In order to get a good idea as to which type of fasteners to use, you first need to consider the way in which roof installation works. You may come to a point where you need to make a decision about whether to use nails or screws for construction of a metal roof. In such cases, it’s critical that you make the right decisions regarding this, since it will determine how safe it will be. A good example of this is when you are putting up a metal roof on your house. ![]() ![]() It is always critical that you use the right type of fasteners for any job since this will determine many things from how safe the house will be to how expensive it will be to construct. ![]() Whenever you are doing any type of home construction, one of the issues you will always need to address is which type of fastener to use. It is always critical that you use the right type of fasteners for any job since this will determine many things from how safe the house will be to Usually drilling just 3/8" will cut through enough grain to keep it perpendicular to the connector hardware.Whenever you are doing any type of home construction, one of the issues you will always need to address is which type of fastener to use. Near the edges of some boards the grain might encourage the screw to dig in at an angle. retrofitting) It's not a bad idea to have a compact drill handy with a 7/64" bit. Their ese of use does come at a premium though, as I've only seen them in small quantitly boxes so far of 100, priced at about ¢10 a piece. They really are a dream to drive - they use a 1/4" hex head, so with a magnetic bit they will stay in place in the driver while you manuver the clip into position.Īs far as strength, Simpson has stated that the screws have been found to have MORE strength than the nails you would have ordinarily used. You have to match the screw (SD9 or SD10) to the specific hurricane clip you will be using - pick the clip then see which screw you need from their chart on tht page. Here are the specific screws you are looking for:Īll the big box stores and builders stores carry them now. You can't do any damage by beating on the head of the nail that will effect either the pull out strength or the shear strength. A nail on the other hand can only be damaged by bending, and it is pretty obvious to anyone who looks that the damage has been done. This damage is below the surface and very hard to detect. This is particularly easy with an impact driver, and torx heads. I have not seen any real lab generated data on the failure modes so, my opinion is just a highly educated guess.Īlso, it is possible to over torque a screw so that you have stretched it far enough to weaken it. But the increased holding power of the screw leaves fracture as the only mode of failure. Personally, I think that under similar loads, the nails would have failed in pull out. One of hte hesitations some people have against screws is that they have seen screws that failed, and blame the failure entirely on the increased brittleness. This leaves the screw more susceptable to failure under shock loads than a nail. The issue with screws versus the nails, is that the thread forming process can lead to embrittlement and hardening of the screw. The local one I have been bying mic out at 0.136. Simpson catalogs #9 screws that have a diameter of 0.131. A #10 wood screw is slightly over that, and a #8 is slightly under that, varying by manufacturer. And, if I were doing the work for myself, I would just tell the local Inspector that I was going to use them, and he would make a note in his inspection file that I did.īack to the OP's question: A #8 nail has a diameter of 0.131-inches. There are some form GRK, and a regional manufacturer, that I would probably approve. So, they are extremely hesitant to do it. The problem of approving screws from the designer's perspective is: It requires them to put their license, and financial well being on the line, for a very low return. Right now the only ones I know of that are certifed are the ones simpson is selling. Generally screws aren't code compliant unless the manufacturer has taken the time to have them certified, or a Licensed Desgin Professional authorizes the use of a specific product.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |