Design data for the Pac-Tie are reported separately for Canada and the United States in the following tables because design methods and requirements for masonry ties and their uses differ between their respective codes and standards.
| Design Parameter |
Design Data (i),(iii)
|
1. Mechanical Free Play (iv)
(with FERO V-Tie™)
|
0.74 mm (max.) [0.029"]
|
| 2. Serviceability at 0.45 kN [100 lbs] (iv) |
Tie Mounted Directly
to Steel Stud
|
Tie Mounted on Surface of Protected Exterior Gypsum Sheathing over Steel Stud (ii)
|
| Displacement |
0.45 mm [0.018"] |
1.13 mm [0.044"] |
Displacement +
Mechanical Free Play |
1.19 mm (max.)
[0.047"] |
1.87 mm (max.)
[0.074"] |
3. Factored Resistance
(Ø Pult) (v),(vi),(vii) |
1.34 kN [300 lbs.]
|
| 4. Maximum Recommended Spacing (viii) |
Horiz.
800 mm [32"]
|
Vert.
600 mm [24"]
|
| (i) |
These design data are based on testing in accordance with CSA A370-04 with no surcharge, and with test samples having the following configuration: 102 mm [4”] cavity; standard AB-Clip, Backer Plate, and Fero V-Tie™; two (2) fasteners connecting the Pac-Tie System to the structural backing; and V-Tie™ positioned at the AB-Clip centreline. Smaller cavity widths will increase the tabled factored resistance of the tie and reduce tie deflections.
|
| (ii) |
“Protected Exterior Gypsum Sheathing” consisted of Perma-Barrier (by W.R. Grace) adhered over 12.7 mm (0.5”) exterior gypsum sheathing.
|
| (iii) |
These design data reflect both the windward (compression) and leeward (tension) capacities of the Pac-Tie System, with the governing values listed.
|
| (iv) |
The Pac-Tie System satisfies the limiting requirements for serviceability (tie displacement and free play) in CSA A370-04. Tabled mechanical free play is for stainless steel components. The mechanical free play for hot-dip galvanized components is less.
|
| (v) |
The ultimate strength of the Pac-Tie System, Pult, is determined in accordance with CSA A370-04, and is calculated by multiplying the average tie strength established by testing by (1 – 1.64 cov). The factored resistance of the tie system (φ Pult) is calculated using Limit States Design, with φ = 0.9, and following the procedures of CSA A370-04.
|
| (vi) |
The stated tie factored resistance is based on the capacity of Fero tie components and does not consider fastener resistance. A compatible fastener having an adequate factored resistance must be selected (by design in accordance with CSA A370-04).
|
| (vii) |
The factored resistance of the mortar pull-out or push-out for the V-Tie™ embedded at the centreline of 90 mm (3.5”) brick veneer utilizing Type S or N mortar exceeds or equals the tabled factored resistance, φ Pult. That is, failure by pullout/pushthrough of the mortar joint does not govern.
|
| (viii) |
Maximum recommended tie spacings are the maximum spacings permitted by CSA S304.1-04, Design of Masonry Structures. For a particular design, the actual tie spacings are calculated such that the factored resistance of the tie, φ Pult, equals or exceeds the effect of factored loads. See S304.1-04 for the design of masonry veneer systems. |
