Base Plate

Column base plates, consist of a single plate welded to the end of the column and attached to the foundation with four holding down bolts. They are used to not only secure the columns to the ground but also provide a wide area to transfer the load from the structure to the concrete pad below.

Eaves Haunch to Flange

The use of a haunch at the eaves reduces the required depth of rafter by increasing the moment resistance of the member where the applied moments are highest. The haunch also adds stiffness to the frame, reducing deflections, and facilitates an efficient bolted moment connection. The eaves haunch is typically cut from the same size rolled section as the rafter, or one slightly larger, and is welded to the underside of the rafter. The length of the eave’s haunch is generally 10% of the frame span.

Apex Haunch

This connection is most commonly used at the top the roof to connect the individual rafters. It consists of two beams spliced with bolted end plates(10mm), on which haunches or plates can be attached at the top/and at the bottom. The haunches are created from profile or plates. Additional stiffeners and anti-sag elements can be added if necessary.

Bracing Single & Double

Bracing ensures that trussed rafters maintain a rigid, secure and stable roof structure. This helps to combat wind where bracing can transmit wind forces between other supporting elements of the structure.

Tie Bar Single & Double

Tie bars are steel hollow cold rolled circular sections, typically placed in the center of the web in line with the rafter joints. They are designed to reduces transverse stress by holding the individual sections in contact. This assists in the load transfer between sections. Whilst also increasing structural stability.

Gable Post Fin Plate

The fin plate connection is a popular solution in connection of additional supporting columns and rafters, this is because of the absence of shared bolts between members. This is done by welding the fin plate to the rafter and bolting it to the supporting member on the beam’s web.

Moment Connection

A moment connection, usually between a column and beam has two parts. A main supporting column with a welded endplate, this element secures to the flange of the secondary horizontal beam. Then there is an additional welded endplate on the beam that overhangs the supporting column, it is secured with bolts on the outer flange. This kind connection reduces the moment forces on the connection.

Cleat

The cleat connection utilizes an angle piece to secure either beam to a column or beam to beam. The main advantages of angle cleat connections are that no welding is required as both members are secured with bolts and that the bolt hole clearances allow minor adjustments to be made on site.

Spacer Beam

A piece of a steel bar placed in between the two beams or columns of the web of the beams is called a spacer bar. They are inserted perpendicularly to the web and assist in maintaining a uniform space between the beams. This connection is done by bolting spacer to the beams with a singular bolt.

Crank 90°

A crank is a welded, angled section that allows for a connection between two perpendicular beams. Cranked beams are most frequently used in roof structures where the midsection follows the pitch of the roof.

Kink 90°

A kink 90° connection is a 90° section of steel welded together, at a mitered joint. It is used to affix a column and beam together where a bolted connection cannot be used. Having a welded connection rather than a bolted connection will mainly be used where access to the area is challenging and or bolts cannot be used.

Gusset

A gusset connection is a triangular connection used to provide additional stiffness for members that are offset from each other, this is commonly used for plates that are welded to the bottom of the beam.

Stiffeners

As the name suggests, the stiffeners provide additional stiffness to the web of a beam. These are flat steel pieces that are welded, they can be attached transversely or longitudinally to prevent buckling from compression and shearing stresses on the member.

Beam Splice

A beam splice consists of 4 bolted plates that are used to secure both beams from all sides. At the top and bottom of the flange, long bolted plates are secured to both members. These are referred to as Flange cover plates. These assist in support of the Tension as well as compression of the members. The we also have the 2 plates that are placed at the sides of the web, these are generally smaller and require less bolts to secure the sides, these plates assist in the support of the shear stress placed on the flange cover plates.

Plate Top

These plates are used when the span of the flange is not wide enough to support the wall or other elements above, this provides larger surface area for the elements above the beam.

Plate Bottom

A bottom plate is often used to secure walls below the beam. These plates to be offset due to how the beams and walls are laid out. The bottom plate is often used in conjunction with a gusset for extra support.

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