For more information about lag screws, their uses, or how to install them, contact us at ProvenProductivity@bossard.com. removed a strip of bark all the way around a branch so sap could not flow past that point. Read through the page on tree damage to learn how to reduce the damage you cause when the supports are fixed to the tree.   Thanks for the info. Thread a 15-inch galvanized lag bolt into place and tighten it with a socket wrench. I once drilled a hole completely through a large branch of my parents tree -- that had split wide open after cold weather. These are like giant screws with hexagonal heads that tighten into a pre-drilled hole. -- Doug Geiste                     | 3M Health Information Systems   |    "I'm hurrying as fast as I can!" Hope your kids get as much good out of it as I did! Real pain to get a***into. The ins and out of mulch (from a newbie), 7. Of course that wasn't a palm. The problem with rods or bolts is if the tree is a merchantable species it may be worthless after the rods/bolts are inserted. I suspect maple may be a better choice than hemlock-- hemlock tends to split a bit. Currently I screwed piece of 2x4 along the trunk and 2x4 on top of that, so that there's kind of a small shelf on each trunk and 2x6 plank between the trees just rest on top of those shelves. The tree will have to divert energy to wall off the wounded area and seal over it … That means the already weak tree will have a harder time getting the nutrients? SUMMARY: (re: WANTED - chinese tallow tree seeds), 12. yicn lag ssug eheoe edr thufn odxalo ex, 13. In order to "keep things out of the tree", mounted the camera to a piece of wood then bolt the wood to the tree. Stainless steel 316. AgCan zone 5a, USDA zone 4 (on a windy hilltop) *************************************************************************** from: original poster Quote:>Thanks for your quick response. They have a hexagonal head which is tightened by a spanner or wrench. Bolt Hardware to the Tree Photo by Anthony Tieuli. I may ask you a followup question when >I decide exactly which tree to use - could be a maple or hemlock. Insert the lag bolt into the hole. Lag screws won't kill the tree. 5. The holes never heal. 10. Lag bolt/lag screw. Stainless steel 18-8. ..!uunet!his!geiste            |, **************************************************************************** Quote:>plans for the tree house came from a book entitled "Outdoor Building" *************************************************************************** Other trees, like oaks, do not take kindly to having soil disturbed around their roots, or soil compaction from lots of traffic. That would kill the branch and it would rot and fall. But as a tree ages, it can not maintain the walls and infection starts to spread. They're secured with a ratchet into all kinds of media. Just remember to use LARGE washer on the  lag screws as, over time, the tree will 'push' the wood right over the head of the screw(trees do grow). In fact, as already mentioned, rods and bolts/lag bolts will do less damage to a tree than bands and straps around the trunk or limbs. Knee braces | Dangerous things to avoid | Non-flat surfaces | Improving stability | Building without trees. If the tree is healthy, it can maintain the barrier walls for decades. Kay Klier  (botanist) Biology Dept   UNI *********************************************************************. Lag Screws are hex head screws with thick Lag Screws are hex head screws with thick shafts and coarse threads. Large bolt with a coarse thread, commonly used for fixed joints on supports into the tree. The tree will have to divert energy to wall off the wounded area and seal over it eventually. A hardware store's staff can help you figure this out, but usually a 2-by-4 piece of wood will need a concrete lag bolt with a diameter of half an inch. Use a hammer to knock the first couple threads in into the hole. Bottom line, don’t further burden an already stressed tree. The best time to drill holes is mid-summer. Need safe way to get rid of spider mites on oak tree [SUMMARY], 10. ge dated 11-13-94, markkane@ins.infonet.net said to All:? BTW, where did you get the plans for the treehouse? it needs to regain strength. Washers, like bolts, should be galvanised for rust protection. It worked and it healed and grew over the bolt which I just left in the tree. later bobby ********************************************************************** Pre-drill using a bit the same diameter as the internal part of the threaded section Structurally rated lag bolts screws are available, but most home centers carry generic versions of varying quality. The most common stainless steel for general hardware use. it will hold better. 2) Some species can bleed a lot of sap when their bark is punctured when the sap is moving. It doesn't sound like you intend to do that though. As I put the pipe wrench up to the bolt, it suddenly became apparent that because of the way the branches were growing at this spot, I’d have to push up on the wrench to tighten the bolt — while standing on the wobbly ladder. removed a strip of bark all the way around a branch so sap could not flow past that point. Pecan Tree roots putting off a natural herbicide. The best time to drill holes is mid-summer. You might want to revise your plan a bit and build a treehouse supported by 4x4's around a tree (a railed platform with the tree's trunk through the center) or next to a tree. It's important to have the correct size of concrete lag bolt before you begin your project. Lag screws won't kill the tree. Sap flows most heavily in spring or fall in most trees. Lag bolts are generally the best thing to use because the pre-drilled hole in the tree only has to be the length of the bolt less the beam thickness, not the entire diameter of the tree as is necessary with full bolts. Unfortunately TABs are much more expensive than lag bolts and require a special drill bit to form the correctly shaped hole, but for large treehouses there is no better way of attaching supports to the tree. I'd like to do the same for my kids and have put it off becuase I wasn't sure how to secure it to the tree(s). (Now). Just remember to use LARGE washer on the  lag screws as, over time, the tree will 'push' the wood right over the head of the screw(trees do grow). Putting lag screws (aka lag bolts) into a tree will damage the tree. In short, if the tree is big enough to support a tree house, it ought to be big enough to handle a few holes, as long as the holes are drilled before fall. non treated wood will decay at a rate proportional the growth of your kids. Buy Lag Screws, Lag Bolts, Coach Screws at InStock Fasteners - The low-price easy-to-use source for industrial and construction fasteners. This means the holes can be drilled using a normal drill bit. For more shopping options click here. #2 - Hold the TAB level and start turning the bolt into the tree very slowly to ensure the first couple of threads catch the wood. i.e. A pilot hole is a hole that is drilled into the material you wish to use a lag screw on. treated wood will be there forever. Lag bolts come in different sizes to hold different weights. Projects for beginners, with or without trees, Build | Plans | World treehouses | Books | Tools | Contact, Build | World treehouses | Plans | Books | Tools | Contact, Home > Building advice > Supports > Fixtures and fastenings, Types of support | Flexible supports | Rigid framed supports | Fixtures and fastenings | Metal brackets | Cables Reason I ask is some trees have weak wood, and I'd hate to see the kids get hurt with falling or split branches. The lag bolt needs to be long enough to go through the concrete and securely penetrate the wood by at least five inches. Sep 23, 2015 - Lag bolt or lag screw or coach screw for treehouse. Lag bolts are generally the best thing to use because the pre-drilled hole in the tree only has to be the length of the bolt less the beam thickness, not the entire diameter of the tree as is necessary with full bolts. Diameter needs to be considered as well when choosing a size. In short, if the tree is big enough to support a tree house, it ought to be big enough to handle a few holes, as long as the holes are drilled before fall. They are sometimes sold as deck washers or simply large square washers. I suspect maple may be a better choice than hemlock-- hemlock tends to split a bit. >plans for the tree house came from a book entitled "Outdoor Building", >Thanks for your quick response. The advantage of a lag bolt is the amount … A standard washer should also be used under the head of the bolt to spread the load into the beam. * TABs are unequivocally the best way to attach treehouses to trees. Screw a nut onto the other end of the TAB. Would you mind posting a summary of responses you get? Using the metal tube as a guide, drill an 8-inch-deep hole into the tree with a 1 1⁄4-inch auger bit. 2) The tree "bleeding" from the holes. (Now). A lag bolt is used in wood construction to assemble structures such as decking, bridges and beams. 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