Phone: 360-757-4111 Fax: 866-479-7518

FACTORY DIRECT - STEEL ROOFING

  • Tuff-Rib
  • Pro-Panel
  • Snap Lock

TUFF-RIB 36” COVERAGE


MATERIAL SPECIFICATIONS

Gauge: 29
Weight: 1.98 lb. /LF
Steel Yield Stress: 80,000 psi
Galvanized Steel Gauge, AZ-50

Paint System: Baked-on Silicone Modified Polyester Gauging System:  Miramac, Inc. follows the national A.I.S.I. (American Iron and Steel Institute) specifications manual for tolerances in galvanized sheet metal.

All gauges conform to ASTM A446 Grade E (80,000 min. yield) unless otherwise designated at time of order


LOAD TABLES

  Live Load
Uplift Load
  (Strength) (Internal Pressure)
SPAN 2’ 3’ 4’ 5’ 2’ 3’ 4’ 5’
(in feet)
29 Gauge
113 45 19 10 113 59 33 21
(Simple Span)
29 Gauge
119 69 36 18 119 74 42 27
(Continuous Span)

1 ½” Bearing Length                                                                 
Load Span Tables Based on Working Stress. Flexural Design analysis according to AISI “Specification for the Design of Light Gauge Cold-Formed Steel Structural Members” May 1981. Continuous Span Loading applies to sheets continuous over three or more spans

Weight of sheet has not been allowed for when calculating live load and Uplift.

Deflection (L/180) limiting live load based on deflection of span. Metal thickness based on minimum ASTM specifications for allowable load calculations. Loads may be increased by 1/3 for wind loads

Note: The load tables have been compiled for the design of steel roofing and siding used in conjunction with either wood or steel framed structures.  Miramac, Inc. assumes no responsibility, either expressed or implied, for its use.

Wind Speed Live Loads (lbs. per Square Foot)
70 mph 12.6
80 mph 16.4
90 mph 20.8
100 mph 25.6
110 mph 31.0
120 mph 36.9
130 mph 43.3


Areas of discontinuity are subject to higher spikes in wind pressure, therefore a different coefficient in wind pressure will need to be considered and multiplied by a factor of 1.5Data from: 1994 UBC Table


APPLICATION DETAILS

Roof Application: Fasteners to be applied along side every rib and attached to each purlin.  Please note that it is the responsibility of the builder to insure that purlins are adequately spaced to meet specific engineering requirements. 

Miramac Inc. is nether partially nor solely responsible for improper installation or defects as a result of installation.


Note: If panels are to be cut, or pre-drilled, be certain to wipe free any metal chips that have accumulated on the panel.

Wall Screw Application: Fasteners to be applied along side every rib and attached to each girt.  Please note that it is the responsibility of the builder to insure girts are adequately spaced to meet specific engineering requirements.

 

Coming Soon!    


SNAP LOCK 12" COVERAGE

Miramac

MATERIAL SPECIFICATIONS

Gauge: 26,24
Weight: 26ga = 1.13 lb. /LF
              24ga = 1.40 lb. /LF 
Steel Yield Stress: 50,000 psi
Galvanized Steel Gauge, G90

Paint System: Baked-on Silicone Modified Polyester Gauging System:  Miramac, Inc. follows the national A.I.S.I. (American Iron and Steel Institute) specifications manual for tolerances in galvanized sheet metal.

 
APPLICATION DETAILS

Construction No. 529
January 08, 2009
Uplift — Class 90 Fire Not Investigated

Miramac

  1. Metal Roof Deck Panels* — No. 29 MSG min coated steel. Max panel width 24 in. Rib height nominal 1 in. Panels continuous over two or more spans. A bead of sealant may be used at panel endlaps.
  2. Fasteners — (Screws) — For panel attachment to wood deck (Item 3), fasteners to be No. 10 x 1 in. long No. 2 Phillips, Pancake Head Type A. Fasteners spacing to be 12 in. OC with fasteners installed through prepunched slots in fastener flange of panel. For attachment of plywood deck (Item 3) to joists (Item 5), fasteners to be min. No. 6 by 1-7/8 bugle head screw or annular ring-shank nails. Spacing to be 6 in. OC at plywood edges and 12 in. OC at intermediate supports. When light gauge structural steel joists are used, fasteners to be No. 12 by 1-5/8 in. long with a Phillips head.
  3. Substructure — (Plywood) — Plywood decking to be a nom 5/8 in. thick, exposure sheathing span C-D, 40/20 plywood. All butt joints to be sealed against leakage by using tape and/or caulk or with one-part urethane sealant.
  4. Moisture Barrier— Any suitable membrane to protect substructure (Item 3).
  5. Joists — Joists spaced at 2 ft, 0 in. OC, may be one of the following:
    • Nom 2 by 6 in. wood joists No. 2 or better.
    • Nom 2 by 4 in. wood when used on a top cord of a wood truss, No. 2 or better.
    • Light gauge structural steel framing with the member against the plywood to be a min No. 22 MSG coated steel.
    • Refer to General Information, Roof Deck Construction, (Roofing Materials and Systems Directory) for Items Not Evaluated.

      *      Bearing the UL Classification Mark
      TGKX.529 - Roof Deck Constructions
LOAD TABLES


Section : New Tech FF100 Panel (Snap Lock)
File :FF100X12
Date: 8/29/2002
Width - 12.56 in
Alloy - ASTM A792, G50 (Fy=50 ksi)
Gauge - 24 (0.024 in)

SPAN
DEFLECTION
SPAN LOAD(FEET)
2.00
2.25
2.50
2.75
3.00
3.25
3.50
3.75

4.00
1
L/180
82
65
52
43
36
30
26
22
19
L/240
82
65
52
43
35
27
22
18
15
L/360
78
55
40
30
23
18
15
12
10
2
L/180
82
65
52
43
36
30
26
22
20
L/240
82
65
52
43
36
30
26
22
20
L/360
82
65
52
42
33
26
21
17
14
3
L/180
95
75
61
50
42
35
30
26
23
L/240
95
75
61
50
42
35
30
26
23
L/360
95
75
61
50
42
34
27
22
18
  1. Formula's used in Load Tables for FLEXURE and DEFLECTION are:
            One Span        - Mp = .125wl^2, Mn = .125wl^2,    x = .0130wl^4/EI
            Two Span        - Mp = .125wl^2, Mn = .096wl^2,    x = .0092wl^4/EI
            Three Span     - Mp = .080wl^2, Mn = .107wl^2,     x = .0069wl^4/EI
            Modulas of Elasticity (E) = 29500 ksi
  2. Allowable uniform loads are determined per the following:
            a) Allowable Shear Stress (Fv)                         [AISI, C3.2]
            b) Combined Bending and Shear                      [AISI, C3.3]
            c) Combined Bending & Web Crippling             [AISI C3.5]
  3. Factors of Safety used to determine uniform loads:
            FS (Bending) = 1.67
            FS (Shear) = 1.50
            FS (Web Crippling) = 1.85
  4. Allowance has been made for member Dead Weight.
  5. Minimum panel support bearing length = 2.00 in
  6. Concentrated load = 250 lbs at mid-span, load width = 4 in
            Simple Span   : Maximum Span = 1.361 ft (L/180)
            Two Span        : Maximum Span = 1.560 ft (L/180)
            Three Span + : Maximum Span = 1.648 ft (L/180)

Note: If panels are to be cut, or pre-drilled, be certain to wipe free any metal chips that have accumulated on the panel.

Miramac Inc. is nether partially nor solely responsible for improper installation or defects as a result of installation.
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