Does pre-drilling affect withdrawal resistance?

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The majority of the time, self-tapping screws are installed with no pre-drilling. However, for some applications it is helpful to pre-drill a hole.

Is it safe to load screws laterally in the end grain?

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Standard design procedures in CSA O86 and NDS 2018 account for strength reductions associated with end grain installation, but member strength must...

When do I need to reinforce pre-engineered connectors?

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Dependent on installation location reinforcement of connector plates is required in order to maintain continuous shear transfer in the connected me...

What is the maximum distance that inclined screws in a screw cross can be spaced apart?

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If an inclined shear-tension screw and an inclined shear-compression screw are far apart, do they still function as a screw cross?

Can the tensile strength of a fastener be adjusted for short term loading?

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When loaded in tension, the withdrawal resistance of a fastener may be adjusted to short term loading, can the tensile strength be adjusted as well?

Are ASSY self-tapping screws considered “full-body” fasteners?

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Full body fasteners have a shank diameter that is equal to the outside thread diameter of the threaded portion.

How do I achieve a concealed, high capacity, fire rated post to beam connection using deep and narrow beams?

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For connecting a 6-⅞” by 21” beam to a column.

Can I use the RICON on both sides of a header?

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For symmetrical installation of RICON pre-engineered connectors application can often be limited by the width of the member resulting in fastener c...

(Canada) How do I calculate the design strength of inclined screws?

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Fully threaded self-tapping screws are optimized for axial loading. By sufficiently inclining the screws toward the line of the force, lateral conn...

(USA) How Do I Calculate the Design Strength of Inclined Screws?

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Fully threaded self-tapping screws are optimized for axial loading. By sufficiently inclining the screws toward the line of the force, lateral conn...

Can the Ricon®️ S VS and Gigant Systems Resist Uplift Forces?

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The RICON®️ S VS and GIGANT pre-engineered beam hangers are designed so that the beams are simply lowered into place during construction. To resist...

What Is ISO 50001?

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The International Organization for Standardization (ISO) has awarded SWG ASSY®️ screws with ISO 50001 certification.

Are Self-Tapping Screws Recognized in the Building Codes?

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Some conventional fasteners types, such as nails, bolts, and lag screws, have a devoted section in the building codes devoted to design procedures....

Can We Add up Force Contributions from Inclined Screws and 90° Shear Screws?

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When installing inclined fasteners, fasteners driven in at 90° to the shear plane are sometimes installed prior to inclined fasteners to ensure tig...

What Is the Rope Effect and Is It Considered in Connection Design Approaches in North America?

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The rope effect (or “string effect”) describes an additional strengthening component caused by the axial capacity of laterally loaded dowel-type fa...

Which Drill Should Be Used to Install Assy Fasteners?

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ASSY fasteners need capable equipment in order to be installed, as for longer fasteners significant torque can develop.

Which Diameter Do I Enter into the Yield Model Equations?

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Self tapping screws have up to 3 diameters: the outside thread diameter (D), the smooth shank diameter (Ds), and the minor (or “root”) diameter (Dm).

Can Megant Connectors Be Tightened from Below?

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Whether the secondary beam is installed with the crane from the side, from above or from below, Megant installation instructions show the threaded ...

Can Knapp Beam Hangers Be Welded to Steel?

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Knapp RICON S VS beam hangers with welded collar bolts can be welded to steel for the purpose of hanging wood beams to steel columns or girders.

Do Group Effects Apply to Fasteners Loaded in Withdrawal?

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NDS 2015 and CSA O86 do not include group action factors for fasteners loaded in withdrawal. European timber design models, however, account for gr...

Is Pre-Drilling Required For Inclined Screw Applications?

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When fully threaded screws are inclined to the wood surface, additional measures may be required in order for the screw tips to bite into the wood ...

How Can I Reduce Connection Geometry Requirements For ASSY® Self Tapping Screws?

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Self-tapping screws require larger relative geometry requirements than bolts or lag screws, but these can be reduced.

Can Screw Heads Be Left Exposed in Fire Rated Connections?

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Exposed screws create a thermal bridge to the inner core of wood members and leave screws vulnerable to damage.

How Much Do ASSY® Screws Cost Compared to Lag Screws?

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Cost comparison between different fastening technologies must consider the entire picture to have any relevance. A fastener-to-fastener cost compar...

Can European Design Values Be Used in North America?

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EC5, the NDS, and CSA O86 are based on different design approaches which means that characteristic/reference/basic design values cannot be applied ...

Can ASSY® Screws Be Considered “Wood Screws” for the Purpose of Lateral Connection Design? (Canadian)

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Evaluation report CCMC 13677-R for ASSY® screws specifies that lateral resistance of ASSY® screws in timber is to be calculated using CSA O86 Claus...

Which Size Fastener Should I Use for Lateral Connection Design?

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Single shear connection design procedures in both the NDS and CSA O86 are based on the "European Yield Model" which assigns the least of six possib...

What Is the Cost Comparison Between ASSY A2 Stainless Steel Screws and Regular ASSY Carbon Steel Screws?

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Corrosion-free stainless steel screws are roughly 1.5 to 3 times the price of their regular carbon steel counterparts.

Can Ricon® Beam Hangers Be Used to Connect Joists to Headers at Skewed Angles?

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RICON beam hangers are usually used to connect joists to girders at 90° horizontal angles. Generally, a RICON plate attaches to a joist with the sc...

Can Regular Carbon Steel Screws Be Used in a Sheltered, Outdoor Applications?

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Regular ASSY® carbon steel screws are intended for use in dry service conditions only, while corrosion-free ASSY® A2 stainless steel screws are sui...