Design data for the Heavy Duty Rap-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™)
|
0.80 mm (max.) [0.031"]
|
| 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)
|
| Deflection |
0.47 mm [0.019"] |
0.50 mm [0.02"] |
Deflection +
Mechanical Free Play |
1.27 mm (max.)
[0.05"] |
1.30 mm (max.)
[0.051"] |
3. Factored Resistance
(Ø Pult) (v),(vi),(vii) |
1.51 kN [331 lbs.]
|
| 4. Maximum Recommended Spacing (viii) |
Horiz.
800 mm [32"]
|
Vert.
600 mm [24"]
|
| (i) |
These design data are based on connector testing in accordance with CSA A370-04, Connectors for Masonry, with no surcharge and with test samples having the following configuration: 127 mm [5”] cavity; 102 mm [4”] Heavy Duty L-Plate; 25 mm [1”] air space; one (1) fastener located in the centre hole of the L-Plate; standard FERO V-Tie™; and V-Tie™ engaged into L-Plate at position of maximum vertical adjustment. Smaller cavity widths and/or the addition of insulations providing lateral support to the tie L-Plate will increase the tabled factored resistance of the tie and reduce tie deflection.
|
| (ii) |
Protected exterior gypsum sheathing consisting of Perma-Barrier (W.R. Grace) adhered to 12.7 mm (0.5”) exterior gypsum board.
|
| (iii) |
These design data reflect both the windward (compression) and leeward (tension) capacities of the Heavy Duty Rap-Tie system, with the governing values listed.
|
| (iv) |
The Heavy Duty Rap-Tie satisfies the limiting requirements for serviceability (tie displacement and mechanical 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 Heavy Duty Rap-Tie, 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 (ø Pult = ø R) is calculated using the Limit States Design procedures of CSA A370-04.
|
| (vi) |
The stated tie factored resistance does not consider fastener resistance. A compatible fastener (or fasteners) 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-through 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, ø Pult. Failure by pull-out/push-through 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,
Ø Pult, equals or exceeds the effect of factored loads. See S304.1-04 for the design of masonry veneer systems. |
