|
STEEL |
|
|||||
|
Thickness |
0.55 |
0.60 |
0.70 |
0.80 |
0.90 |
1.00 |
|
65/333 |
6.48 |
7.07 |
8.25 |
9.43 |
10.61 |
11.79 |
|
65/400 |
6.15 |
6.71 |
7.83 |
8.95 |
10.07 |
11.19 |
|
65/500 |
5.79 |
6.31 |
7.36 |
8.42 |
9.47 |
10.52 |
|
ALUMINUM |
|
||||
|
Thickness |
0.70 |
0.80 |
0.90 |
1.00 |
1.20 |
|
65/333 |
2.86 |
3.27 |
3.68 |
4.08 |
4.91 |
|
65/400 |
2.71 |
3.10 |
3.49 |
3.88 |
4.65 |
|
65/500 |
2.55 |
2.92 |
3.28 |
3.64 |
4.38 |
Design Principle:
The design of a standing seam roof are based on the following principles:
• No puncturing of the sheets for fixing
• To allow the sheets to move freely to accommodate the thermal expansion.
• Ensure the sheets are fixed firmly to the sub structure.
All the above requirements are met with a specially designed T-Seam® clip which allows for positive anchoring of the roof to the sub-structure at the same time allowing all the thermal movements. The T-Seam® clips are provided with Thermal pads to act as a thermal break.
T-Seam® clip sizes:
The T-Seam® clips are supplied in variable heights to meet the various insulation thickness requirements. We supply these clips as per the insulation thickness requirement. (See table below for sizes.)
|
T-Seam® Clip Sizes |
||
|
Clip Type |
H(mm) |
W(mm) |
|
T-25 |
81 |
25 |
|
T-50 |
106 |
45 |
|
T-75 |
131 |
70 |
|
T-95 |
151 |
90 |
|
T-105 |
161 |
100 |
|
T-115 |
171 |
110 |
|
T-125 |
181 |
120 |
|
T-135 |
191 |
130 |
T-Seam® Fixed point:
The T-Seam® roofing is a floating construction. This means there is a need to restrict the sheet at one point which is called the fixed point. Generally the fixed points are located at the ridge. The fixed point will have to be properly designed taking into account the length of the panel, the building slope, design loads etc.
Also the sub-structure to which the fixed point clips are fixed, should be designed to transfer the loads. Care should be taken that there is only one fixed point for a single length of T-Seam® panel, because it may result in buckling of sheets, opening of seams or shear of fixings.
Fixed point construction:
Type 1: A hole is drilled through the small seam directly into the clip-head and blind rivet inserted. The head of rivet gets covered by the large seam of the next head.
Type 2: The T-Seam® flange is bolted to the clip after zipping.
Purlin Roof Construction:
In this construction the Inner deck sheet and outer T-Seam® roof corrugations run parallel to each other. The inner deck sheet will be spanning from purlin to purlin. The T-Seam® clips are either fixed directly to the purlin through the valley of the corrugation of the deck or fixed to the omega profiles which are in turn fixed to the purlin/ inner deck. The clips can be directly fixed to the purlin only if the pitch of the inner sheet is a module of the T-Seam® width. Otherwise an omega profile will have to be fixed over the inner liner sheet.
For curved roof as well as re-roofing applications, it is recommended to use the omega spacer profile.
Rafter Roof Construction:
In this construction the Inner deck sheet and outer T-Seam® roof corrugations run perpendicular to each other. The inner deck sheet will be spanning from rafter to rafter. The T-Seam® clips are either fixed directly to the top of the corrugation of the deck or fixed to the omega profiles which are in turn fixed to the inner deck.
The minimum thickness of the steel inner deck for direct fixing of the clips should be 0.70mm. In this construction the inner steel deck transfers all the loads from the external T-Seam® roof to the rafters, hence to be designed properly.
It is very important to fix the clips in a pattern, which distributes the loads evenly on the inner deck sheet.
• A continuous row of clips to be fixed at the ridge and eaves location.
• In between the clips are fixed diagonally, to avoid the overloading of the inner deck corrugation.
• The location of the clips to be as per the installation drawing.
