Tables

The following tables will prove useful in figuring the quantity of material required to cover a given number of square feet.

Flat-Seam Roofing

Table showing quantity of 14 x 20-inch tin required to cover a given number of square feet with flat-seam tin roofing. A sheet of 14 x 20 inches with 1/2-inch edges measures, when edged or folded, 13 x 19 inches or 242 square inches. In the following all fractional parts of a sheet are counted as full sheet.

No. of sq. ft.

Sheets required

100

59

110

65

120

70

130

76

140

82

150

88

160

94

170

100

180

105

190

111

200

117

210

123

220

129

230

135

240

140

250

146

260

152

270

158

280

164

290

170

300

175

310

181

320

187

No. of sq. ft.

Sheets required

330

193

340

199

350

205

360

210

370

216

380

222

390

228

400

234

410

240

420

245

430

251

440

257

450

263

460

269

470

275

480

280

490

286

500

292

510

298

520

304

530

309

540

315

550

321

No. of sq. ft.

Sheets required

560

327

570

333

580

339

590

344

600

350

610

356

620

362

630

368

640

374

650

379

660

385

670

391

680

397

690

403

700

409

710

414

720

420

730

426

740

432

750

438

760

444

770

449

No. of sq. ft.

Sheets required

780

455

790

461

800

467

810

473

820

479

830

484

840

490

850

496

860

502

870

508

880

514

890

519

900

525

910

531

920

537

930

543

940

549

950

554

960

560

970

566

980

572

990

578

1000 square feet, 583 sheets

A box of 112 sheets 14 x 20 inches will cover approximately 192 square feet.

Example. How much 14 x 20 inch tin with 1/2-inch edges is required to cover a roof of 20 feet x 84 feet? Take 20 x 84 = 1,680 square feet.

Referring to the table for Flat Seam Roofing, 1000 square feet require

583 sheets and 680 square feet require 397 sheets, making a total of

980 sheets.

It should be understood that this amount is figured on the basis of 247 square inches in an edged sheet, which will be a trifle less when the sheets are laid on the roof.

Example. What quantity of 20 x 28-inch tin will be required to lay a standing seam roof, measuring 37 feet long x 45 feet in width?

Take 37 x 45 = 1,665 square feet, or 16 squares and 65 feet. Referring to the table for Standing Seam Roofing, 16 squares require 4 boxes and 48 sheets, and 65 feet require 20 sheets, making a total of 4 boxes and 68 sheets.

Standing-Seam Roofing

Table showing the quantity of 20 X 28-inch tin in boxes, and sheets required to lay any given standing-seam roof.

SQ. FEET

SHEETS

SQUARES

SQ. FEET

liOXES

SHEETS

SQUARES

BOXES

SHEETS

1

1

..

68

.

21

35

9

77

2

1

..

69

.

21

36

9

108

3

1

..

70

.

22

37

10

27

4

2

..

71

.

22

38

10

58

5

2

..

72

.

22

39

10

89

6

2

..

73

.

22

40

11

8

7

3

..

74

.

23

41

11

39

8

3

..

75

.

23

42

11

70

9

3

..

76

.

23

43

11

101

10

4

..

77

.

24

44

12

20

11

4

..

78

.

24

45

12

51

12

4

..

79

.

2J

46

12

82

13

4

..

80

.

25

47

13

1

14

5

..

81

.

25

48

13

32

15

5

..

82

.

25

49

13

63

16

5

..

83

.

25

50

13

94

17

6

..

84

.

26

51

14

13

18

6

..

85

.

26

52

14

44

19

6

..

86

.

26

53

14

75

20

7

..

87

.

27

54

14

106

21

7

..

88

.

27

55

15

25

22

7

..

89

.

27

56

15

56

23

7

..

90

.

28

57

15

87

24

8

..

91

.

28

58

16

6

25

8

..

92

.

28

59

16

37

26

8

..

93

.

28

60

16

68

27

9

..

91

.

29

61

16

99

28

9

..

95

.

29

62

17

18

29

9

..

96

.

29

63

17

49

30

10

..

97

.

30

64

17

80

31

10

..

98

.

30

65

17

111

32

10

..

99

.

30

66

18

30

33

10

..

100

.

31

67

18

61

34

11

1

..

.

31

68

18

92

35

11

2

..

.

02

69

19

11

36

11

3

..

.

93

70

19

42

37

12

4

..

1

12

71

19

73

38

12

5

..

1

43

72

19

104

39

12

6

..

1

74

73

20

23

40

13

7

..

1

105

74

20

54

41

13

8

..

2

24

75

20

85

42

13

9

..

2

55

76

21

4

43

13

10

..

2

86

77

21

35

44

14

11

..

3

5

78

21

66

45

14

12

..

3

36

79

21

97

46

14

13

..

3

67

80

22

16

47

15

14

..

3

98

81

22

47

48

15

15

..

4

17

82

22

78

49

15

16

..

4

48

83

22

109

50

16

17

..

4

79

84

23

28

51

16

18

..

4

110

85

23

59

52

16

19

..

5

29

86

23

90

53

16

20

..

5

60

87

24

9

54

17

21

..

5

91

88

24

40

55

17

22

..

6

10

89

24

71

56

17

23

..

6

41

90

24

102

57

18

24

..

(i

72

91

25

21

58

18

25

..

6

103

92

25

52

59

18

26

..

7

22

93

25

83

60

19

27

..

7

53

94

26

2

61

19

28

..

7

84

95

26

33

62

19

29

..

8

3

96

26

64

63

19

30

..

8

34

97

26

95

64

20

31

..

8

65

98

27

14

65

20

32

..

8

96

99

27

45

66

20

33

..

9

15

100

27

76

67

21

34

..

9

46

Size of sheet before working, 20 X 28 inches. Exposed on roof 27X 17 3/4 inches Square inches per sheet exposed 479 1/4 inches. Sheets per box 112.

NET WEIGHT PER BOX TIN PLATES

Basis 14 x 20 , 112

Trade term.

80-lb.

85-lb.

90-lb.

95-lb.

100-lb.

IC

IXL

IX

IXX

IXXX

IXXX X

Weight per box, lb.

80

85

90

95

100

107

128

135

155

175

195

Size of sheets

Sheets per box

80

85

90

95

100

107

128

135

155

175

195

10 x 14

225

14 x 20

112

80

85

90

95

100

107

128

135

155

175

195

20 x 28

112

160

170

180

190

200

214

256

270

310

350

390

10 x 20

225

114

121

129

136

143

153

183

193

221

250

279

11 x 22

225

138

147

156

164

172

184

232

234

268

302

337

11 1/2 x 23

225

151

161

170

179

189

202

242

255

293

331

368

12 x 12

225

82

87

93

98

103

110

132

139

`59

180

201

12 x 24

112

82

87

93

&9632;98

103

110

132

139

159

180

201

13 x 13

225

97

103

109

115

121

129

154

163

187

211

235

13 x 26

112

97

103

109

115

121

129

154

163

187

211

235

14 x 14

225

112

119

126

133

140

150

179

189

217

245

273

14 x 28

112

112

119

126

133

140

160

179

189

217

245

273

i15 x 15

225

129

137

145

153

161

172

206

217

249

281

313

16 x 16

225

146

155

165

174

183

196

234

247

283

320

357

17 x 17

225

165

175

186

196

206

221

264

279

320

361

403

18 x 18

112

93

98

104

110

116

124

148

156

179

202

226

19 x 19

112

103

110

116

122

129

l -138

165

174

200

226

251

20 x 20

112

114

121

129

136

143

153

183

193

221

260

279

21 x 21

112

126

134

142

150

158

169

202

213

244

276

307

22 x 22

112

138

147

156

164

172

184

221

234

268

302

337

23 x 23

112

151

161

170

179

189

202

242

255

296

331

368

24 x 24

112

164

175

185

195

204

220

363

278

319

360

401

26 x 26

112

193

205

217

229

241

258

309

326

374

422

471

16 x 20

112

91

97

103

109

114

122

146

154

177

200

223

14 x 31

112

124

132

140

147

155

166

198

209

240

271

302

11 1/4 x 22 1/4

112

73

78

82

87

91

98

13 1/4 x 17 3/4

112

60

71

76

80

84

90

13 1/4 x 19 1/2

112

73

77

82

87

91

97

13 1/2 x 19 1/2

112

75

80

85

89

94

100

13 1/2 x 19 3/4

112

76

81

86

90

95

&9632;102

14 x 18 3/4

124

83

88

93

98

103

110

14 x 19 1/4

120

83

88

93

98

103

110

14 x 21

112

84

89

95

100

105

112

14 x 22

112

88

94

99

105

110

118

14 x 22 1/4

112

89

95

100

106

111

119

151/2 x 23

112

102

108

115

121

127

136

STANDARD WEIGHTS AND GAUGES OF TIN PLATES

Trade term ..

65-lb.

70-lb.

75-lb.

80-lb.

85-lb.

90-lb.

95-lb.

100-lb.

Nearest wire gauge No. .

35

35

34

33

32

31

31

30

Weight, square foot, lb. .

.298

.322

.345

.367

.390

.413

.436

.459

&9632;Weight, box, 14 x 20, lb. .

65

70

75

80

85

90

95

100

Trade term .....

IC

IXL

IX

IXX

IXXX

IXXXX

Nearest wire gauge No. .

30

28

28

27

26

25

24

Weight, square foot, lb. .

491

.588

.619

.712

.803

.895

.987

Weight, box, 14 x 20. lb. .

107

128

135

155

175

195

215

IC 14 x 20

IC 20 x 28

IX 14 x 20

IX 20 x 28

Black plates before coating

lb.

lb.

lb.

lb.

weight per 112 sheets

95 to 100

190 to 200

125 to 130

250 to 260

When coated the plates.

weigh per 112 sheets .

115 to 120

230 to 240

145 to 150

290 to 300