SLOTTED STUD TIE (TYPE II) SYSTEM
The Slotted Stud Tie (Type II) was developed for brick veneer steel stud wall construction where significant differential movement between the veneer and the steel stud backup wall is expected, such as high walls or multi-storey buildings with full height veneer. The Slotted Stud Tie (Type II) allows for up to 60 mm (2.4") of construction adjustability and up to 25 mm (1") of differential movement between the veneer and the backup wall.
Note that as the Slotted Stud Tie (Type II) is only capable of transferring forces perpendicular to the wall and not parallel to the wall, composite action cannot be achieved between the masonry veneer and the steel stud backup wall. For the design of shear connected brick veneered steel stud wall systems (i.e. composite wall construction), see Fero Stud Shear™ Connector.
SLOTTED STUD TIE (TYPE II) DESCRIPTION
Every Slotted Stud Tie (Type II) assembly consists of a Slotted Stud Plate (Type II), a V-Tie™, and an optional Insulation Support.
The Slotted Stud Plate (Type II) component, presented in Figure 1, is manufactured from 16 gauge (1.61 mm [0.063"] thick) sheet metal conforming to ASTM Standard A570, and is available in hot dipped galvanized finish (conforming to CSA CAN3-A370-04 and ASTM A153 requirement of 458 g/m2/side [1.5 oz/ft2/side] of zinc coating) and stainless steel.
The length of the Slotted Stud Plate (Type II) can vary to accommodate stud width (S) of 102 mm (4"),152 mm (6") and 203 mm (8"), insulation plus membrane plus gypsum sheathing thickness (IG) of 0 mm (0") and up, and air space width (A) of 25 mm (1") and greater.
The two 30 mm (1.2") high by 5.25 mm (0.21") wide slots at the end of the Slotted Stud Plate (Type II) allow for up to 60 mm (2.4") of construction adjustability and up to 25 mm (1") of differential movement between the plate and the V-Tie™.
Four, 6.0 mm (0.24") diameter screw holes in the stud width portion (S), of the Slotted Stud Plate (Type II) provide for adequate fixity of the plate to the steel stud. Note that a minimum of two screws per connector is required to produce a moment connection. The shear mode connection of the screws is much more desirable than the corrosion susceptible tension mode connection.
Thermal bridging reducing holes are incorporated within the insulation thickness portion (IG), of the Slotted Stud Plate (Type II).
The V-Tie™, as shown in Figure 2 , is manufactured from 4.76 mm (0.19") diameter wire conforming to CSA Standard G30.3, and is available in hot dipped galvanized finish (conforming to CSA CAN3-A370-04 and ASTM A153 requirement of 458 g/m2/side [1.5 oz/ft2/side] of zinc coating) and stainless steel. The legs of the V-Tie™ are mortared into place at the centerline of the brick veneer.
The Insulation Support is manufactured from polyethylene and is optionally used to secure the sheet insulation in place.
RECOMMENDED DESIGN LOAD AND DEFLECTIONS
| 1 | Free Play (maximum): | 0.50 mm (0.02") | |
| 2 | 0.45 kN (100 lbs) Deflection: - free play not included: - including free play: |
0.10 mm (0.0004”) 0.60 mm (max) (0.024”) |
|
| 3 | Recommended Design Load: | 1.27 kN (284 lbs) | |
| 4 | Recommended Design Load Deflection - free play not included: | 0.28 mm (0.011”) | |
| 5 | Maximum Recommended Spacing: | Horizontal | Vertical |
| 800 mm (32") |
600mm (24") |
||
SLOTTED STUD TIE (TYPE II) NOTES
- The design values reflect both the windward and leeward capacity of the Slotted Stud Tie (Type II) system, with the governing values listed.
- The tie system recommended design load value was formulated using working stress design following the procedures of CSA CAN3-A370-04 "Connectors for Masonry", ACI/ASCE/TMS/518 and U.B.C. The value has been reduced to account for test result variation, and reflects a factor of safety of 2.25 (i.e. 75% of 3.0), as per Table 3 (A370).
- The allowable mortar pull-out or push-out design load for the V-Ties™ embedded at the centerline of 90 mm (3.5") brick veneer utilizing Type M, S, or N mortar, exceeds or equals the recommended design load listed above.
- The above design values relate to the capacity of the FERO tie components. Compatible fasteners capable of resisting the design loads must be selected.
- The above design values are based on test results utilizing a 127 mm (5") cavity (25 mm [1"] air space). No insulation or gypsum sheathing was used. Note that for smaller cavity widths and/or with the addition of insulation sheathing providing lateral tie support, increased tie system design loads and reduced tie system deflections may be realized.
Maximum recommended spacing reflects the maximum allowable by CSA-A370-04, ACI/ASCE/ TMS/518 and U.B.C. For stud construction, every vertical stud should contain ties. Design will ultimately govern spacing.
View figure 5, An installation wall section
SLOTTED STUD TIE (TYPE II) SPECIFICATION GUIDELINES
The Slotted Stud Plate (Type II) specification length (S) refers to the actual width of the stud, the specification length (IG) refers to the actual thickness of the insulation plus membrane plus gypsum sheathing, and the specification length (P) refers to the length of projection of the Slotted Stud Plate (Type II) into the air space.
The V-Tie™ specification length (L) should be selected to provide for placement of the legs of the V-Tie™ at the centerline of brick veneer. The 80 mm (3.1") V-Tie™ is utilized in the Slotted Stud Tie (Type II) system consisting of 25 mm (1") air space and 90 mm (3.5") brick veneer. Other V-Tie™ sizes are: 60 (2.4"), 100 (3.9"), 120 (4.7"), 140 (5.5"), 160 (6.3"), 180 (7.1"), 200 (7.9"), 225 (8.9") and 250 (9.8") mm.
The Insulation Support is standard.
