{"id":8889,"date":"2026-10-15T07:20:36","date_gmt":"2026-10-15T07:20:36","guid":{"rendered":"https:\/\/ristek.pl\/timber-connectors-for-wood-nail-plates-and-other-hardware-in-wooden-structures\/"},"modified":"2026-10-27T14:12:44","modified_gmt":"2026-10-27T14:12:44","slug":"timber-connectors-for-wood-nail-plates-and-other-hardware-in-wooden-structures","status":"publish","type":"post","link":"https:\/\/ristek.pl\/en\/timber-connectors-for-wood-nail-plates-and-other-hardware-in-wooden-structures\/","title":{"rendered":"Timber connectors for wood \u2013 nail plates and other hardware in wooden structures"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"8889\" class=\"elementor elementor-8889 elementor-8802\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6ddcd98 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6ddcd98\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f2865d4\" data-id=\"f2865d4\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-409aa39 elementor-widget elementor-widget-text-editor\" data-id=\"409aa39\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h1>Timber connectors \u2013 nail plates and other hardware in wooden structures<\/h1>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2fdf675 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"2fdf675\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c0fd22f elementor-widget elementor-widget-text-editor\" data-id=\"c0fd22f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Timber connectors for wood are steel elements that transfer forces between beams, rafters, and posts without the need for cutting tenons and mortises. Nail plates hold a special place among them, as they are the only popular carpentry hardware that does not require a single nail. In wooden structures, and especially in roof trusses, the durability of the connection is determined by matching the connector to the location and installation technology. Therefore, the following sections outline the types of connectors, selection principles, installation instructions, and situations where nail plates are the best choice, as well as those where they cannot be used.   <\/p>\n<h2><strong>What are timber connectors for wood, and what place do nail plates hold among them?<\/strong><\/h2>\n<p>Timber connectors are metal elements that join two or more wooden components into a single working unit. Nail plates belong to the group of pressed-in inserts\u2014connectors that are embedded into the wood under the pressure of a press. <\/p>\n<p>In a study by researchers from the Cz\u0119stochowa University of Technology, steel connectors in wooden structures were divided into three groups.<\/p>\n<ul>\n<li><strong>Dowel-type fasteners<\/strong> include nails, screws, bolts, pins, and staples, which work in bending and shear.<\/li>\n<li><strong>Profiled steel elements<\/strong> are hardware such as angle brackets, beam hangers, and saddle connectors, fastened to wood with nails, screws, or bolts.<\/li>\n<li><strong>Mechanical pressed-in and embedded connectors<\/strong> include nail plates, punched metal plate fasteners, and split-ring connectors.<\/li>\n<\/ul>\n<p>This division has practical significance. The first two groups are installed on-site, while the third requires a prefabrication plant. It is therefore more reasonable to treat nail plates as an element of a finished product, i.e., a truss, rather than as hardware purchased individually for DIY use.  <\/p>\n<h2><strong>Types of timber connectors for wood \u2013 from angle brackets to nail plates<\/strong><\/h2>\n<p>The most commonly used carpentry hardware includes angle brackets, perforated plates, beam hangers, rafter-to-purlin connectors, perforated strapping, and nail plates. Each corresponds to a different type of connection and requires different fastening elements. <\/p>\n<table>\n<thead>\n<tr>\n<td>\n<p><strong>Connector type<\/strong><\/p>\n<\/td>\n<td>\n<p><strong>Typical application<\/strong><\/p>\n<\/td>\n<td>\n<p><strong>Fastening method<\/strong><\/p>\n<\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\n<p>Angle bracket (angle connector)<\/p>\n<\/td>\n<td>\n<p>Beam to post, rafter to wall plate, right-angle connections<\/p>\n<\/td>\n<td>\n<p>Ring shank nails or connector screws<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>Perforated plate<\/p>\n<\/td>\n<td>\n<p>Elements in one plane, collar beam to rafter, brace to post<\/p>\n<\/td>\n<td>\n<p>Ring shank nails, double-sided fastening<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>Beam hanger (joist hanger)<\/p>\n<\/td>\n<td>\n<p>Floor joist to main beam, wall plate, or top plate<\/p>\n<\/td>\n<td>\n<p>Ring shank nails, anchors for masonry<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>Rafter connector<\/p>\n<\/td>\n<td>\n<p>Rafter on purlin or wall plate<\/p>\n<\/td>\n<td>\n<p>Ring shank nails<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>Perforated strapping<\/p>\n<\/td>\n<td>\n<p>Wind bracing for roof trusses<\/p>\n<\/td>\n<td>\n<p>Ring shank nails<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>Nail plate<\/p>\n<\/td>\n<td>\n<p>Nodes of prefabricated roof trusses<\/p>\n<\/td>\n<td>\n<p>No nails, pressed in with a press<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><strong>Angle brackets and angle connectors<\/strong><\/h2>\n<p>Angle brackets join elements at right angles and are the most universal hardware in wooden structures. They are made of sheet metal with a thickness of 2 to 4 mm, and versions with an embossed rib are intended for heavily loaded connections. Experience shows that using an angle bracket without reinforcement in a rafter-to-wall plate node is a saving of a few cents that is not worth taking.  <\/p>\n<h2><strong>Perforated plates and perforated strapping<\/strong><\/h2>\n<p>Perforated plates join elements lying in the same plane and are usually installed in pairs, one on each side. Standard dimensions range from 40&#215;120 to 200&#215;300 mm with a sheet thickness of 1.5 to 2 mm, which is confirmed by a publication on <a href=\"https:\/\/yadda.icm.edu.pl\/baztech\/element\/bwmeta1.element.baztech-28fa28ee-f641-4608-929f-e14702635f0e\/c\/kysiak.pdf\" target=\"_blank\" rel=\"noopener\">steel timber connectors in the repair of roof truss nodes<\/a>. Perforated strapping is used to stiffen the truss.  <\/p>\n<h2><strong>Beam hangers and rafter connectors<\/strong><\/h2>\n<p>Beam hangers support a beam from below like a stirrup and are primarily used in wooden floors. Rafter-to-purlin connectors are used to join rafters to purlins; they transfer the reaction from the rafter to the supporting element, e.g., a purlin, ensuring the stability and rigidity of the connection. <\/p>\n<h2><strong>Nail plates and split-ring connectors<\/strong><\/h2>\n<p>Nail plates and split-ring connectors transfer forces through the pressure of spikes or teeth pressed into the wood. Both solutions require a press, while split-ring connectors are additionally tightened with a bolt passing through the axis of the connector. <\/p>\n<h2><strong>Nail plates as timber connectors for wood \u2013 construction and principle of operation<\/strong><\/h2>\n<p>A nail plate is a sheet of galvanized or stainless steel with rows of spikes embossed on one side. The sheet usually has a thickness of 1 to 2 mm, and the spikes replace several rows of nails distributed evenly over the entire contact surface. The technology was introduced in the United States in the 1960s and has since become the basis for the production of prefabricated trusses.   <\/p>\n<p>The principle of operation is based on three features.<\/p>\n<ul>\n<li><strong>No notches in the wood<\/strong> \u2013 the plates do not weaken the cross-section of the joined elements, so lumber cross-sections can be smaller than with traditional tenon or mortise connections.<\/li>\n<li><strong>Uniform stress distribution<\/strong> \u2013 the large number of spikes limits the impact of minor wood defects at the node location.<\/li>\n<li><strong>Predictable strength<\/strong> \u2013 the position and size of each plate result from calculations, not from a decision made on the construction site.<\/li>\n<\/ul>\n<p>Plates are <a href=\"https:\/\/zpe.gov.pl\/a\/Dm0eW9uqS\" target=\"_blank\" rel=\"noopener\">pressed in exclusively with a press<\/a> at the production plant, simultaneously from both sides of the node.<\/p>\n<h2><strong>Where are timber connectors for wood in the form of nail plates used?<\/strong><\/h2>\n<p>Nail plates are primarily used in prefabricated roof trusses, which are frameworks of beams joined in a single plane. Besides the roofs of single-family homes, they are used in lattice girders for halls, in wall nodes of frame structures, and in vertical extensions of existing buildings where low structural weight is important. <\/p>\n<p>However, they are not suitable for two situations.<\/p>\n<ul>\n<li><strong>Traditional trusses installed on-site<\/strong> \u2013 the lack of a press precludes the correct seating of the plates.<\/li>\n<li><strong>Renovation and strengthening of existing nodes<\/strong> \u2013 here, perforated plates, angle brackets, and nail-on plates are used.<\/li>\n<\/ul>\n<h2><strong>Nail plates vs. perforated plates \u2013 which timber connectors for wood to choose?<\/strong><\/h2>\n<p>Nail plates are chosen for prefabrication, while perforated plates are for on-site installation. Both join elements in a single plane, but they differ in almost everything except shape. <\/p>\n<table>\n<thead>\n<tr>\n<td>\n<p><strong>Feature<\/strong><\/p>\n<\/td>\n<td>\n<p><strong>Nail plate<\/strong><\/p>\n<\/td>\n<td>\n<p><strong>Perforated plate<\/strong><\/p>\n<\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\n<p>Fastening method<\/p>\n<\/td>\n<td>\n<p>Spikes pressed in with a press<\/p>\n<\/td>\n<td>\n<p>Ring shank nails driven into holes<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>Installation location<\/p>\n<\/td>\n<td>\n<p>Prefabrication plant<\/p>\n<\/td>\n<td>\n<p>Construction site<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>Dependence on the contractor<\/p>\n<\/td>\n<td>\n<p>Low, machine process<\/p>\n<\/td>\n<td>\n<p>High, the number and type of nails matter<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>Use in renovations<\/p>\n<\/td>\n<td>\n<p>No<\/p>\n<\/td>\n<td>\n<p>Yes<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>Selection basis<\/p>\n<\/td>\n<td>\n<p>Truss design and manufacturer&#8217;s software<\/p>\n<\/td>\n<td>\n<p>Structural design and load capacity tables<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>It is also worth clarifying the terminology. The terms &#8216;nailing plates&#8217; and &#8216;nailed plates&#8217; are sometimes used for both perforated plates and plates with spikes. When ordering material, it is safer to describe the fastening method than to rely on the name alone.  <\/p>\n<h2><strong>How to select timber connectors for wood for a specific connection?<\/strong><\/h2>\n<p>The connector is selected based on the force acting in the node, the dimensions of the elements, and the conditions in which the structure will work. The selection and placement of steel connectors should be planned by a designer, as emphasized by the authors of a work on <a href=\"https:\/\/yadda.icm.edu.pl\/baztech\/element\/bwmeta1.element.baztech-016932db-2033-4a31-b513-f4fd35d6cc8c\/c\/kysiak2.pdf\" target=\"_blank\" rel=\"noopener\">timber connectors in traditional and modern roof truss structures<\/a>. <\/p>\n<p>A helpful rule organizes the decision into three questions.<\/p>\n<ol>\n<li><strong>Design<\/strong> \u2013 what type of hardware, what size, and how many connectors are provided for a given node? Steel-to-wood connections are calculated according to the PN-EN 1995-1-1 standard, i.e., <a href=\"https:\/\/eurocodes.jrc.ec.europa.eu\/EN-Eurocodes\/eurocode-5-design-timber-structures\" target=\"_blank\" rel=\"noopener\">Eurocode 5<\/a>. <\/li>\n<li><strong>Coating<\/strong> \u2013 does the anti-corrosion protection correspond to the service class? The interior of a dry attic, a covered terrace, and a coastal zone require different protection. <\/li>\n<li><strong>Fastening<\/strong> \u2013 have the nails or screws specified by the manufacturer been selected for the hardware?<\/li>\n<\/ol>\n<p>Market observations show that investors most often skip the second question. Meanwhile, it is corrosion, not overload, that is often the first visible sign of poorly selected hardware, especially when the wood was treated and installed while wet. <\/p>\n<h2><strong>Installing timber connectors for wood \u2013 step-by-step instructions<\/strong><\/h2>\n<p>The instructions apply to hardware installed on-site, such as angle brackets, perforated plates, and beam hangers.<\/p>\n<p><strong>Step 1: Check hardware and nails against the design<\/strong><\/p>\n<p>A mistake at this stage is repeated in all roof nodes. Compare the markings on the packaging with the material list. Check the hardware type, sheet thickness, <a href=\"https:\/\/www.gov.pl\/web\/rozwoj-technologia\/wyroby-budowlane\" target=\"_blank\" rel=\"noopener\">CE mark<\/a>, and nail type. Smooth nails and black drywall screws are not a substitute for ring shank nails.   <\/p>\n<p><strong>Step 2: Assess the wood at the node location<\/strong><\/p>\n<p>The hardware transfers the load only if the nails hold in sound material. Inspect the ends of the beams and the contact points. If the connection point falls near large knots on the element, the wooden element must be replaced. Wet wood shrinks as it dries, and hardware can become loose.    <\/p>\n<p><strong>Step 3: Fit the elements flush<\/strong><\/p>\n<p>A gap between elements causes the entire load to be taken by the nails working in bending. Press the elements together and, if necessary, secure them with a wood clamp. A gap of a few millimeters in perforated plates disqualifies the connection.  <\/p>\n<p><strong>Step 4: Position the hardware and mark the holes from the design<\/strong><\/p>\n<p>Not every hole in the hardware is intended to be filled. Position the hardware, check the distances from the edge and the end of the beam, and then mark the holes indicated in the nailing schedule. Nails driven too close to the end of the beam cause it to split along the grain.  <\/p>\n<p><strong>Step 5: Drive in the specified number of ring shank nails<\/strong><\/p>\n<p>The load capacity declared by the manufacturer applies to a specific number and arrangement of fasteners. Drive the nails perpendicular to the sheet metal until the conical enlargement under the head wedges into the hole. Start with the outermost nails so the hardware does not shift. Both too few nails and filling all holes without a basis in the design impair the node&#8217;s performance.   <\/p>\n<p><strong>Step 6: Inspect the node <\/strong><\/p>\n<p>An error detected before the roofing is laid can be fixed in minutes. Check if the hardware is not pulling away and if the wood has not split. Take a photo of the node before it is enclosed. A crack originating from a nail means the connection must be corrected.   <\/p>\n<p>After completing these steps, the connection should work as assumed in the calculations. For trusses with nail plates, the investor&#8217;s role is different. You should collect the manufacturer&#8217;s documentation, check if the plates are pressed in over the entire surface on both sides of the node, and ensure the transport and storage of the trusses in the position specified by the manufacturer.  <\/p>\n<h2><strong>How many nails should be driven into a carpentry angle bracket?<\/strong><\/h2>\n<p>As many as specified by the design or the manufacturer&#8217;s nailing schedule. Filling all holes without a basis in the documentation can change the static scheme of the system. <\/p>\n<h2><strong>Can carpentry hardware be fastened with ordinary wood screws?<\/strong><\/h2>\n<p>No. For hardware, ring shank nails or special connector screws are used, which wedge into the hole of the sheet metal. <\/p>\n<h2><strong>Most common mistakes when using timber connectors for wood<\/strong><\/h2>\n<p>The most common mistake is fastening hardware with the wrong fasteners, such as smooth nails or black drywall screws. Such screws are brittle and do not handle the shear forces that dominate in hardware well. Other recurring mistakes include:  <\/p>\n<ul>\n<li>fewer nails than in the design, usually justified by the claim that the connection is already holding<\/li>\n<li>attempting to manually seat nail plates<\/li>\n<li><a href=\"https:\/\/extranet.worldstainless.org\/Files\/issf\/non-image-files\/PDF\/Euro_Inox\/Contact_with_Other_PL.pdf\" target=\"_blank\" rel=\"noopener\">combining stainless steel hardware with galvanized nails<\/a>, which accelerates the corrosion of the weaker metal<\/li>\n<li>installation in wet wood without subsequent inspection of the connections<\/li>\n<li>driving timber screws too deep, which crushes the fibers under the head<\/li>\n<\/ul>\n<p>The belief that more nails always mean a stronger connection is just as harmful as skimping on them. A heavily perforated beam end splits more easily than one with correctly spaced fasteners. <\/p>\n<h2><strong>Timber connectors for wood \u2013 summary<\/strong><\/h2>\n<p>The choice comes down to the construction technology. For prefabricated trusses, nail plates are the correct solution, while for on-site constructions, angle brackets, perforated plates, and beam hangers fastened with ring shank nails are used. In both cases, the starting point remains the design, which specifies the type of hardware, its size, and the number of fasteners.  <\/p>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Timber connectors \u2013 nail plates and other hardware in wooden structures Timber connectors for wood are steel elements that transfer forces between beams, rafters, and posts without the need for cutting tenons and mortises. Nail plates hold a special place among them, as they are the only popular carpentry hardware that does not require a<\/p>\n","protected":false},"author":6,"featured_media":8890,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-8889","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/ristek.pl\/en\/wp-json\/wp\/v2\/posts\/8889","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ristek.pl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ristek.pl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ristek.pl\/en\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/ristek.pl\/en\/wp-json\/wp\/v2\/comments?post=8889"}],"version-history":[{"count":1,"href":"https:\/\/ristek.pl\/en\/wp-json\/wp\/v2\/posts\/8889\/revisions"}],"predecessor-version":[{"id":8891,"href":"https:\/\/ristek.pl\/en\/wp-json\/wp\/v2\/posts\/8889\/revisions\/8891"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ristek.pl\/en\/wp-json\/wp\/v2\/media\/8890"}],"wp:attachment":[{"href":"https:\/\/ristek.pl\/en\/wp-json\/wp\/v2\/media?parent=8889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ristek.pl\/en\/wp-json\/wp\/v2\/categories?post=8889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ristek.pl\/en\/wp-json\/wp\/v2\/tags?post=8889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}