UDC 691.424

THAI INDUSTRIAL STANDARD

. 158 2518

STANDARD FOR CLAY PLAIN ROOFING TILES

6 10400

0 2202 3300

93 28 12 2519

. 158 2518

(2)

60

...

-

(3)

15 .. 2511

B.S. 402 : Part 2 : 1970 Clay plain roofing tiles

British Standards Institution.

(5)

187 ( .. 2518 )

.. 2511

15 .. 2511

.158-2518

17 .. 2518

-1-

. 158-2518

1.

1.1

2.

2.1

3.

3.1

3.1.1 1 4.2.1

3.1.2 2 4.2.2

3.2

3.2.1 1

3.2.2 2

3.2.3 3

3.2.4 3.2.1 3.2.2 3.2.3

-2-

. 158-2518

3.3 3.3.1 1

3.3.1.1 3 3.3.1.2 6 3.3.1.3

3.3.2 23.3.2.1 5

1

( 3.2)

-3-

. 158-2518

2 ( 3.2)

-4-

. 158-2518

3

( 3.2)

-5-

. 158-2518

3.3.2.2 10 3.3.2.3

4.

4.1 4.1.1 (red burning clay or plastic clay or ball clay)4.1.2 (white clay or kaolin) (grog)

4.2

4.2.1 () ()

4.2.2 () ()

5.

5.1 5.1.1 5.1.2 5.1.3

5.2 5.2.1 (water absorption) 13.5

.5.2.2 (transverse strength) 7

(70 ) .

-6-

. 158-2518

6.

6.1

6.2 (1) (2) (3) (4) (5) (6) (7)

6.3

7.

7.1 7.1.1

1

1 ( 7.1)

2 500 35

2 501 4 000 45

4 001 6 500 60

6 501 16 000 85

16 001 40 000 120

40 001 50 000 160

-7-

. 158-2518

7.1.2

7.2 7.2.1

2

2 ( 7.2)

20 2

10 0

6 0

6 0

-8-

. 158-2518

.

.1 .2

.2.1 10 .2.2 10 2

.3 3.2

-9-

. 158-2518

Ww WbWb

.

.1 110 5

(Wd) 24 (Ww)

.2 0.1 3

.3

= 100

Wd Ww 24

-10-

. 158-2518

.

.1 24 .2 .1

40 180 445 667

.3 .

.4

S =

S P L 180 b d

1.5 PLbd2

-11-

. 158-2518

A B

.1 ( .2)