Dai goes to the Source

Part of an exchange Dai had with Max Closen, of My-Ti-Con Timber Connectors.

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Daizen Joinery Blog

Dai ASSY Plus VG Self Tapping Fully Threaded Wood Screws








www.logandtimberconnections.com

ASSY Plus VG Fully Threaded Self Tapping Structural Wood Screw

The "plus" in the name of the screw shows that it is a screw with a drilling point.

The ASSY plus VG is a universal screw which can above all be used in the wood glue sector, the carpentry, the wood and modular construction. These screws are especially suitable for: coupled purlins, ledgers, notch and opening reinforcements, main/secondary support beam connection, build-up beams, rafter purlin connection, applications in structural panels/wood frame construction and compression perpendicular to grain and shear reinforcements.

Due to the full thread screw connections can be produced which can stand high bearing loads.

The screw is produced either with a cheese head or a countersunk milling pocket head. It can be hardened, galvanized and yellow or blue passivated.

 

A plastic slide coating reduces the screw-in torque, so that less power is needed for the handling.

Since drilling and screwing can be done in one work step you are capable with the ASSY plus VG to produce screw connections in a time and cost saving way which were up to now difficult to handle.

Self-tapping tip
Significantly reduces the tendency of wood splitting, eliminates pre-drilling requirements reduced edge distances are permissible.

Fully threaded
High withdrawal resistance. High load bearing capacity.

Hardened steel
High tensile strength.

Plastic slip-coated
Reduced screw-in torque.

Countersunk head with
milling pockets
The countersunk head ensures proper scew-head bearing in steel-to-wood connections.

Cylindrical head
Reduced tendency to split compared to countersunk head. The screw can be installed concealed/hidden in the wood by driving it into the wood.
 

 www.logandtimberconnections.com

will.leverett@cox.net

478-474-9745

System Solutions with ASSY Plus VG Fully Threaded Structural Wood Screws

System solutions

ZD-plates

Problem

A portal frame is defined as an assembled load-carrying system of posts and beams. When portal frames are not clamped but tilt mounted on the support leg, they are also able to transfer horizontal loads. Instead of a fixed support at the post base a rigid connection between pillars and beams is created. For this reason a rigid design of the frame corner is necessary. With the increasing relevance of engineered timber frame structures time and cost effective solutions for rigid timber connections between posts and beams are essential.

Current Solution

Currently rigid frame corners in timber structures can be achieved by:

• Post and beam connected by metal parts and nails/drift pins (high assembly effort on site)
• Post and beam connected by pre-glued single or double finger jointing at the shop (elaborate and bulky)
• Post and beam connected by steel parts, for tensile forces, and hardwood inserts for compressive forces.
• Post and beam connected by doweled haunch

 

The disadvantage of these solutions is that they consume too much time, money and effort upon assembling.

SWG solution

The SWG solution is a combination of wood and steel parts. Its essence is a system solution around the ASSY Plus full thread screw, containing of the ASSY Plus VG and tension-compression plates (ZD-plates). In addition to that conventional steel plates and steel bolts (M16) are used.

Technical benefits of the SWG system

• Combining wood and steel construction
• Simple pre-manufacturing
• high level of pre-manufacturing possible
• easy to assemble
• reduced on site construction time
• Optimized connection capacity through combination of tension and compression screws
• reverse loads are taken with ZD-Plate - tension and compression screws

 

The ability to transfer tension and compression forces is unique to the ZD-Plate system.

Commercial benefits of the SWG system

• value added for timber construction companies
• standard timber cross sections can be used
• Reduced number of fasteners when compared to common connection systems
• Time and cost reduction for assembly

Application examples

Timber frame constructions of all kinds

• Warehouses
• Workshops
• Sport centres
• Storage units
• Gym's
• Community halls

www.logandtimberconnections.com
Let us help you get connected!

Cross Laminated Timber Gains Approval

 "Leesburg, Va. – A proposed code change by the American Wood Council (AWC) to expand the use of cross laminated timber through the building code's heavy timber construction classification has been approved by the International Code Council (ICC). The recently approved change will lead the way for new U.S. markets for this emerging wood product in non-residential buildings."


Log andTimber Connection, as distributor of ASSY Self Tapping Structural Wood Screws, is very excited about the Cross Laminated Timber approval. Much research on CLT connections have been conducted with ASSY STS WS and have shown notable improvement in such connections.

www.logandtimberconnections.com

Cross Laminated Timber Gains Approval

 "Leesburg, Va. – A proposed code change by the American Wood Council (AWC) to expand the use of cross laminated timber through the building code's heavy timber construction classification has been approved by the International Code Council (ICC). The recently approved change will lead the way for new U.S. markets for this emerging wood product in non-residential buildings."


Log & Timber Connection, as distributor of ASSY Self Tapping Structural Wood Screws, is very excited about the Cross Laminated Timber approval. Much research on CLT connections have been conducted with ASSY STS WS and have shown notable improvement in such connections.

ASSY Plus VG Fully Threaded Structural Wood Screw Demo

MyTiCon Timber Connectors Inc. testing the applicability of the biggest ASSY VG full thread wood screw in Canadian Cross-Laminated-Timber (CLT)

Typical applications: Glu-lam, Timber Beams, Cross Laminated Timber, Timber Bridges

Log & Timber Connections

Wood-Concrete-Composite Slab

A wood-concrete-composite is a connection between supporting timber beams and a concrete slab mounted on them. A rigid connection is achieved with shear connectors or screws which transfer shear forces between beams and slab. Wood-concrete-composite floors are utilized when large beam spacing’s or spans must be bridged and high pay loads must be carried after retrofitting the ceiling. This bonding is deemed to be the ideal solution for increasing the load-carrying capacity and stiffness of ceiling systems.

The SWG solution

The SWG solution includes a combination of wood and concrete construction. The essence is a system solution that is build around the ASSY Plus full thread screw, composed of the ASSY Plus VG and precast connectors (FT-Connectors). The ASSY Plus VG is inserted into the FT Connector whereby a fast and comfortable screwing of concrete slabs is possible. It is also possible to pre-install the precast connectors to the beam and pour the concrete on site. But in general it is easier to work with custom made concrete slabs in which the FT-Connectors are already embedded.

Commercial Benefits of Our Solution

• Higher added value for wood construction businesses
• The valuable soffits are preserved
• No separating layer necessary to protect the wood from entry of moisture and contamination
• No idle time on site caused by setting concrete
• Less money and time required for assembly

Technical Benefits of Our Solution

• The combination of wood/concrete construction
• The high prefabrication degree
• The short assembly time on site → placing and screwing together of precast concrete parts with ASSY Plus VG.

 

When precast concrete parts are used: no entry of moisture into the wood construction; full load bearing capacity of composite slab right after screw application; no formwork necessary; no support structure required, no assembling of further components on concrete; useable for large beam spans and large beam spacing.

 

The uniqueness lies in the fact that only a comparably small number of screws are needed when using the FT-connectors, which minimizes the amount of work and effort.

Examples of Applications

Wood-concrete-composite floors of all kind, e.g.:

• Floor ceilings and basement ceilings in old and new buildings
• Combination of FT-connectors and shotcrete ceilings when reconstructing old buildings
• Wall and ceiling components in prefabricated houses
• Bridge building

FT-Connector allows for easy cooperation between the concrete and wood industry. Pre-manufactured concrete elements can now be offered and installed to and from wood working companies.

www.logandtimberconnections.com

will.leverett@cox.net

478-474-9745