TimberLOK is a heavy duty wood screw for applications such as attaching rafter or trusses to the top plate, landscape timbers, fences, decks, headers, stair stringers and more.
There is no need to predrill with TimberLOK. Its sharp point and aggressive threads zip right into the densest woods. It is also approved for use in ACQ or treated lumber.
A 6" TimberLOK is a code-compliant way to attach rafters or trusses to a double top plate. For technical documentation of all our structural wood screws, see our Technical Resources page. Choose the proper length so that threads fully engage the main member or bottom piece. Bring fastener head flush to wood surface or countersink head flush. TimberLOK is not recommended for saltwater applications.
Evaluation Reports qualify for building official approval and are developed from test reports that comply with IBC Section This report also provides the engineer with critical values needed to design safe installations. This document can be shared with code officials, engineers, architects and specifiers who may have questions regarding proper use or code compliance of LOK fasteners. FastenMaster technical bulletins are abridged versions of our TERs that demonstrate general guidelines and fastening patterns.
This file contains technical information on how to fasten this application in a code-compliant manner. This file contains technical information on how to fasten this application in a code-compliant manner - Canadian version both English and French.
The file contains information regarding TimberLOK's product guarantee including fastener performance and corrosion resistance. Code Compliance Reports by State. Part Numbers. Technical Docs. Related Products. Purchase FM Products.
From testing to service to availability, everything we do is engineered to ensure your project's success. With every product, you know you are getting the quality, value, service and on-time delivery that we have built our reputation on for the past 60 years. From straps and ties to heavy girder hangers and much more, we have the connection solution for your job. Contact us today and find out how we can help.
Our full line Wood Construction Connectors Catalog includes specifications, load tables and fastener schedules for over 3, connectors. An indispensable reference for anyone planning a wood structure. Whether you're a specifier, builder or homeowner, our state-of-the art design solutions and comprehensive resources can help you prepare and protect structures against damage due to high-wind events.
The Joist Hanger Selector is a quick and easy tool to help in selecting the most cost effective joist hanger based on the type of installation, hanger options, and demand load. Follow the step-by-step instructions for installation in three rafter assembly types. Select One of Our Sites.
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This line of Simpson hardware features a variety of wood-to-wood, wood-to-masonry and wood-to-concrete connectors. Post caps are used for attaching a post to a beam or header. Joist Hangers - Help in anchoring joists in a fixed position, creating a better connection between the joist and the wall or beam. They are available in either a face mount or top flange application for nominal, rough-cut, glulams and all types of engineered lumber.
Framing Angles - Used to strengthen and join two pieces of lumber, or other suitable substrates at an angle, while providing more consistent, straight corners. Framing angles have an unlimited number of uses and come in a wide array of corrosion-resistance for interior, exterior and severe environments.
Deck Ties and Fence Brackets - Deck ties are connectors designed for code compliance in deck construction, specifically where the deck connects to the house and where the deck posts and railing posts are connected. Fence brackets strengthen the connection between fence rails and posts and provide a nice cosmetic appearance. Straps are designed to transfer tension loads in a variety of applications and are available in a wide variety of sizes and load values.
Holdowns and Tension Ties - Holdowns, also known as hold downs or tension ties, represent key components that comprise a continuous load path. They are typically used in light-frame construction to resist uplift due to shear wall overturning or wind uplift forces.
TimberLOK Structural Wood Screw
In panelized roof construction, these connectors are used to anchor concrete or masonry walls to roof framing. Plated Truss Connectors - These ties are light-gauge metal plates that are used to connect prefabricated light frame wood trusses. Their manufacturing facility consistently produces top-quality plates with some of the highest loads in the industry. These are also referred to as H-clips or panel sheathing clips. Outdoor Accents - A great way to add beauty and strength to your custom outdoor living structures.
Our galvanized steel with black powder coat provides corrosion protection for these decorative brackets. Indoor Architectural Products - Aesthetically pleasing, pre-finished connectors and innovative concealed joist ties designed for exposed wood applications. These connectors provide structural performance while adding a unique appearance to a project. They have the same qualities as wood connectors, but are designed specifically for steel in both commercial and residential applications.
Masonry Connectors - These connectors are designed and engineered to be used with anything concrete-related. They are typically used to hold down structures including racking and shelving.
Included in this section are anchors, hangers, straps and tie downs used to connect and reinforce. Sheathing Clips and Truss Clips - Used for alignment control in truss and sheathing connections. Sheathing clips are metal clips designed to be used in between wooden structures to provide support to the edges. Truss clips are light metal clips used to connect wooden trusses. Tie Plates and Mending Plates - Designed to join two pieces of lumber together, both tie plates and mending plates accomplish this task through installation at the joint, and hammering the plate down.
Tie Plates require the use of specified fasteners and create a stronger connection, while Mending Plates are simply hammered down and use metal tabs that penetrate the wood to create a solid connection. Stud Shoes - Created to strengthen, protect and reinforce wooden studs that have been notched for plumbing and other work. The galvanized stud shoes protect the plumbing from nails and other fasteners penetrating the pipes, and also add strength and structural integrity to the studs.Although truss-designed roofs are predominant throughout most of the residential construction industry, there are regions where building with stick-frame roofs is still common.Timber Framing Scarf Joint
There are two common ways of framing the roof of a house: with premanufactured trusses, or with rafters and ceiling joists, commonly called stick framing.
While truss roofs are the most popular construction style today — by some estimates, truss roofs outnumber stick-frame roofs two to one— there are regions of the country where builders still prefer stick-frame roofing. There are several reasons for this. Builders sometimes also prefer this construction method when they want to provide a large attic space or high, vaulted ceilings often called cathedral ceilings.
However, constructing a stick-framed roof is not always easy. For example, in Texas where stick framing is common, there are entire crews specializing only in framing roofs. Meeting current IRC roof framing requirements means builders are really constructing very simple triangles using the rafters and ceiling joists, because triangles are known to be the most stable shape. In order to maintain the triangle shape, there are specific requirements for how to fasten the corners of the triangle together.
Most importantly, the bottom of each triangle the ceiling joistsmust be fastened securely to the rafters on each end and must continue across the entire width of the ceiling so they keep the ends of the rafters from spreading out when loaded. See illustration. Also because of this triangle shape, the connection of rafters to the ridge board is easy because all the weight of the roof is assumed to transfer down to the bearing at the top plate.
However, there are a couple of cases where the bottom leg of the triangles the ceiling joists might not be present or might not connect rafters together. The first case is when the ceiling joists are oriented perpendicular to the rafters. The other common case is the cathedral or vaulted ceiling. The load-resisting concepts of the vaulted ceiling are completely different.
Without the tie at the bottom, the rafters must be supported at their upper end to prevent the rafter thrust at the lower end. Since half the load is now supported at the ridge, the ridge member becomes a ridge beam that is a load-carrying element, and must be designed to bridge the span between the supports, which carry the vertical load to the ground.
This requires a secure connection of the rafters to the ridge beam at the top. Furthermore, if the vaulted roof is constructed as a hip roof, things get even more complicated. Not only must the ridge beam be supported, but the top ends of the hips must also be supported.
And the rafters must have a secure connection to the hips. Simpson Strong-Tie recently developed three products that can greatly simplify the construction of these types of roofs. The LSSJ field-adjustable jack hanger is the ideal hanger for connecting jack rafters to hip or valley members. The LSSJ is designed with a versatile, hinged seat allowing for easy field adjustment to typical rafter slopes, from of When our company is considering a new or improved product, we like to start out by talking to our customers first.
We heard from installers that they really wanted a hanger that could be easily adjusted in the field for different slopes and skews.
We were asked whether we could design a hanger that could be installed after the rafters were already tacked into place to support construction sequencing and retrofit applications. Also, having a hanger that could be installed from one side was a popular time-saving request. Our Engineering innovation team took all this feedback and closely evaluated our current selection of hangers.
After months of designing and testing prototypes in the lab and in field trials, the answer was yes. The result is our new LSSJ field-adjustable jack hanger. This new design allows it to be adjusted to typical rafter slopes, with a max slope of up or down.
What is a jack hanger and why does it provide a better connection than nails alone? There are two basic types of wood roof construction: framed roof construction stick framing as shown above, and truss assembly. The main difference is that stick assembly takes place onsite, while trusses are prefabricated and ready to place. In the United States, the number of truss-built roofs versus stick-frame roofs is about two to one.
The LSSJ jack hanger is used for stick-frame construction and provides a connection between the jack rafter to either the hip rafter or the valley rafter as shown below.
How To Connect Rafters Ridge Beam
Connecting a 2X jack rafter to a hip is hardly new. The hardest thing is making a good compound miter cut — something an experienced framer can figure out and most engineers marvel at. In many parts of the country, these are simply face-nailed into place. However, a closer look raises a couple of questions.
Where exactly are those nails going? This is based on the split that develops at the lowest fastener. The LSSJ conforms to the bottom of the jack rafter slope and ensures consistent nail placement on both the rafter and the hip.
Consistent nail placement promotes consistent performance based on testing or as consistent as wood gets! The highest nail on the hip is located near the neutral axis if the hip is one size deeper than the rafter.
This assures that not all the load is focused at the bottom of the hip. Some of our customers may be familiar with our current product, the LSSU, which is used for the same connection. You can see the differences and improvements just by looking at these hangers, installations and load tables. One of the greatest improvements is the fact that there are fewer nails to install in the LSSJ, and the loads are very similar if not better. We look forward to hearing from you about our newest innovation.
For more information about the LSSJ hanger, please see strongtie. Necessary cookies are absolutely essential for the website to function properly.
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It is mandatory to procure user consent prior to running these cookies on your website.Full depth shear tab - secondary beam cut short of main part.
Use Beam with stiffener Simple shear tab to beam. Use Shear plate simple Simple shear tab to beam - bolt elimination option. Simple shear tab to beam - skewed secondary part. Simple shear tab to beam - sloped and skewed secondary part.
Bolts and plate oriented with secondary part.
Beam to beam framing connections
Valley condition. Partial depth shear tab to top flange of beam - square or skewed, stiffener option. Use Welded to top flange Partial depth shear tab to top flange of beam. Partial depth shear tab to top flange of beam, secondary beam cut short of main part. Square, sloped, skewed. Use Welded to top flange S Full depth shear tab.
Use Full depth Secondary beam cut short of main part. Use Full depth S Sloped secondary. Secondary offset. Bolt elimination option. Use Clip angle Sloped secondary part.
Various notching options. Weld preparation option. Two secondary parts. Use Two sided clip angle Two secondary parts at differing heights. Safety connection.
One sloped.InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website. This article describes the proper method for strong "double-shear" angled or toe nailing of joists or studs that butt into beams or top or shoe plates in wood framed buildings. Properly done, toe-nailing makes very strong wood framing connections.
But mistakes like choosing the wrong nail size, wrong nail placement, or wrong number of nails can mean weak joints and a weak structure. Definition of toe-nailing : framing nails driven on an angle from opposing sides and through the nailed-through wood framing member into the nailed-to framing member so that the "crossed" opposed toe-nails form both a shear-resistant and a withdrawal-resistant connection between the framing members. Toe-nailing or slant-driven nails are commonly used where it is not possible to drive through the side plate or top plate into the framing member, and has been historically widely used for connecting studs to the top or bottom plate, beam to plate, and rafter to plate or ridge board connections.
Toe-nailing is used both stand-alone, without steel framing connectors and also toe-nailing is specified for the installation of some not all framing connectors. In carpentry school we were taught that provided you use the correct type and size fastener common nails, construction screws and the correct number of them there are tables and standards toe-nailed from both sides of the abutment of a stringer face to the floor joist or rafter to ridge and rafter to top plate, or stud to top and bottom plate the connection is completely adequate, and is as strong as that made using proper joist hanger nails and joist hangers.
You will see that there are many opportunities to make a bad connection using either approach, in particular, using improperly-sized, placed, or number of fasteners. There is no evidence in my experience that people make fewer mistakes using a joist hanger than using direct nailing.
They just make different mistakes. Shear loads or lateral load are across the framing nails while withdrawal loads are those that tend to pull the framing nails out of the nailed-to member. It is not necessary to use steel joist hangers if the joist is properly toe-nailed from either side into the ledger board, provided that the proper size and number of nails are used. Our illustration above left, adapted from a Double-Shear stamping on a steel joist hanger explains why toe-nailed lumber connections can be very strong.
We drew in spray-brown color, a representation of wood framing members showing the abutting of 2x lumber vertical in the illustration with a header or beam horizontal in the illustration. The crossed nails, when applied close together as guided by the framing connector or by the hand of a competent framing carpenterform a very strong wood-to-wood connection.
Use of toe-nailing, or angled opposed framing nails Double-Shear in Simpson Strong-Tie's patented joist hanger such as the item adapted abovecan permit the use of fewer total nails in a wood frame construction. Our photo at left shows an unsuccessful use of toenailing in a failed attempt to connect intersecting glulam beams. The nails those brown spots pulled, broke, bent, and allowed the connection to fail.
These beams are not properly connected and their structure is in danger of collapse. That some movement has already occurred is evident in the gap above my tape measure. Because the "toe-nails" cross one another in the header or ledger board when used to secure a deck joist, this connection can actually be stronger than straight-in or end-nailing the deck joists from the other side of the ledger or girder.
But using too many nails below left or too few nails below right is a mistake that results in a weak connection and potentially an unsafe structure.
Using too many nails in a framing lumber connection when toe-nailing or in any position for that matter will also cause a weak framing connection that can lead to structural collapse. That's because an excessive number of nails actually fractures the lumber. If you click-on and enlarge our photo at above left you'll see that the contractor fractured the vertical stud near its top. Our photo left shows about 30 nails shot by the builder during framing of this home.
The framer was trying to drive a recalcitrant stud into position. Clamps might have worked better. This stud was so split as to lose its structural integrity, and replacement of this wall stud was needed. As we show below, adding more nails, even with a pneumatic nail gun, does not do a great job of pulling togehter framing members that are separated.
Using too few toe-nails in a framing lumber connection is going to make a weak structure that could collapse. For code compliant nailing see the nail schedules in the applicable building code for your area. A few examples are cited below. Notice that using the VPA rafter connector the bird's mouth cut or notch is eliminated. At the ridge the rafter is toe-nailed to the ridge board OR a steel framing connector can be used. Below my photo shows separation between the rafter face and the ridge board.
Above: two visible, possibly four maximum, toe-nails through rafter ends along with some other rather odd wood framing in a U.