Äâóòàâðû ñòàëüíûå ãîðÿ÷åêàòàíûå
Hot-rolled steel flange beams. Rolling products
Ñðîê äåéñòâèÿ ñ 01.07.90
Íåñîáëþäåíèå ñòàíäàðòà ïðåñëåäóåòñÿ ïî çàêîíó
Íàñòîÿùèé ñòàíäàðò óñòàíàâëèâàåò ñîðòàìåíò ãîðÿ÷åêàòàíûõ ñòàëüíûõ äâóòàâðîâ ñ óêëîíîì âíóòðåííèõ ãðàíåé ïîëîê.
1. Ïîïåðå÷íîå ñå÷åíèå äâóòàâðîâ äîëæíî ñîîòâåòñòâîâàòü óêàçàííîìó íà ÷åðò. 1.
h — âûñîòà äâóòàâðà; b — øèðèíà ïîëêè; s — òîëùèíà ñòåíêè; t — ñðåäíÿÿ òîëùèíà ïîëêè; R — ðàäèóñ âíóòðåííåãî çàêðóãëåíèÿ; r — ðàäèóñ çàêðóãëåíèÿ ïîëêè
×åðò. 1
Ïðèìå÷àíèå. Óêëîí âíóòðåííèõ ãðàíåé ïîëîê äîëæåí áûòü 6—12 %.
|
Íîìåð
äâóòàâðà |
Ðàçìåðû |
Ïëîùàäü
ïîïåðå÷íîãî
ñå÷åíèÿ, |
Ìàññà
1 ì, êã
|
Ñïðàâî÷íûå çíà÷åíèÿ äëÿ îñåé |
|
h |
b |
s |
t |
R |
r |
X – X |
Y – Y |
|
íå áîëåå ìì |
Ix, |
Wx, |
ix, |
Sx, |
Iy, |
Wy, |
iy, |
|
ñì2 |
ñì4 |
ñì3 |
ñì |
ñì3 |
ñì4 |
ñì3 |
ñì |
|
10 |
100 |
55 |
4,5 |
7,2 |
7,0 |
2,5 |
12,0 |
9,46 |
198 |
39,7 |
4,06 |
23,0 |
17,9 |
6,49 |
1,22 |
|
12 |
120 |
64 |
4,8 |
7,3 |
7,5 |
3,0 |
14,7 |
11,50 |
350 |
58,4 |
4,88 |
33,7 |
27,9 |
8,72 |
1,38 |
|
14 |
140 |
73 |
4,9 |
7,5 |
8,0 |
3,0 |
17,4 |
13,70 |
572 |
81,7 |
5,73 |
46,8 |
41,9 |
11,50 |
1,55 |
|
16 |
160 |
81 |
5,0 |
7,8 |
8,5 |
3,5 |
20,2 |
15,90 |
873 |
109,0 |
6,57 |
62,3 |
58,6 |
14,50 |
1,70 |
|
18 |
180 |
90 |
5,1 |
8,1 |
9,0 |
3,5 |
23,4 |
18,40 |
1290 |
143,0 |
7,42 |
81,4 |
82,6 |
18,40 |
1,88 |
|
20 |
200 |
100 |
5,2 |
8,4 |
9,5 |
4,0 |
26,8 |
21,00 |
1840 |
184,0 |
8,28 |
104,0 |
115,0 |
23,10 |
2,07 |
|
22 |
220 |
110 |
5,4 |
8,7 |
10,0 |
4,0 |
30,6 |
24,00 |
2550 |
232,0 |
9,13 |
131,0 |
157,0 |
28,60 |
2,27 |
|
24 |
240 |
115 |
5,6 |
9,5 |
10,5 |
4,0 |
34,8 |
27,30 |
3460 |
289,0 |
9,97 |
163,0 |
198,0 |
34,50 |
2,37 |
|
27 |
270 |
125 |
6,0 |
9,8 |
11,0 |
4,5 |
40,2 |
31,50 |
5010 |
371,0 |
11,20 |
210,0 |
260,0 |
41,50 |
2,54 |
|
30 |
300 |
135 |
6,5 |
10,2 |
12,0 |
5,0 |
46,5 |
36,50 |
7080 |
472,0 |
12,30 |
268,0 |
337,0 |
49,90 |
2,69 |
|
33 |
330 |
140 |
7,0 |
11,2 |
13,0 |
5,0 |
53,8 |
42,20 |
9840 |
597,0 |
13,50 |
339,0 |
419,0 |
59,90 |
2,79 |
|
36 |
360 |
145 |
7,5 |
12,3 |
14,0 |
6,0 |
61,9 |
48,60 |
13380 |
743,0 |
14,70 |
423,0 |
516,0 |
71,10 |
2,89 |
|
40 |
400 |
155 |
8,3 |
13,0 |
15,0 |
6,0 |
72,6 |
57,00 |
19062 |
953,0 |
16,20 |
545,0 |
667,0 |
86,10 |
3,03 |
|
45 |
450 |
160 |
9,0 |
14,2 |
16,0 |
7,0 |
84,7 |
66,50 |
27696 |
1231,0 |
18,10 |
708,0 |
808,0 |
101,00 |
3,09 |
|
50 |
500 |
170 |
10,0 |
15,2 |
17,0 |
7,0 |
100,0 |
78,50 |
39727 |
1589,0 |
19,90 |
919,0 |
1043,0 |
123,00 |
3,23 |
|
55 |
550 |
180 |
11,0 |
16,5 |
18,0 |
7,0 |
118,0 |
92,60 |
55962 |
2035,0 |
21,80 |
1181,0 |
1356,0 |
151,00 |
3,39 |
|
60 |
600 |
190 |
12,0 |
17,8 |
20,0 |
8,0 |
138,0 |
108,00 |
76806 |
2560,0 |
23,60 |
1491,0 |
1725,0 |
182,00 |
3,54 |
Ïðèìå÷àíèÿ:
1. Ïëîùàäü ïîïåðå÷íîãî ñå÷åíèÿ è ìàññà 1 ì äâóòàâðà âû÷èñëåíû ïî íîìèíàëüíûì ðàçìåðàì; ïëîòíîñòü ñòàëè ïðèíÿòà ðàâíîé 7,85 ã/ñì3.
2. Âåëè÷èíû ðàäèóñîâ çàêðóãëåíèÿ, óêëîíà âíóòðåííèõ ãðàíåé ïîëîê, òîëùèíû ïîëîê, óêàçàííûå íà ÷åðò. 1 è â òàáë. 1, ïðèâåäåíû äëÿ ïîñòðîåíèÿ êàëèáðîâ è íà ãîòîâîì ïðîêàòå íå êîíòðîëèðóåòñÿ.
3.  òàáëèöàõ èñïîëüçóþò îáîçíà÷åíèÿ:
I — ìîìåíò èíåðöèè;
W — ìîìåíò ñîïðîòèâëåíèÿ;
S — ñòàòè÷åñêèé ìîìåíò ïîëóñå÷åíèÿ;
i — ðàäèóñ èíåðöèè.
4. Äâóòàâðû îò ¹ 24 äî ¹ 60 íå ðåêîìåíäóåòñÿ ïðèìåíÿòü â íîâûõ ðàçðàáîòêàõ.
2. Íîìèíàëüíûå ðàçìåðû äâóòàâðîâ, ïëîùàäü ïîïåðå÷íîãî ñå÷åíèÿ, ìàññà è ñïðàâî÷íûå çíà÷åíèÿ äëÿ îñåé äîëæíû ñîîòâåòñòâîâàòü ïðèâåäåííûì â òàáë. 1.
3. Ïî òî÷íîñòè ïðîêàòêè äâóòàâðû èçãîòîâëÿþò:
ïîâûøåííîé òî÷íîñòè — Á,
îáû÷íîé òî÷íîñòè — Â.
4. Ïðåäåëüíûå îòêëîíåíèÿ ïî ðàçìåðàì è ôîðìå ïîïåðå÷íîãî ñå÷åíèÿ äâóòàâðîâ (÷åðò. 1—2) äîëæíû ñîîòâåòñòâîâàòü ïðèâåäåííûì â òàáë. 2.
b1 — øèðèíà óêîðî÷åííîãî ôëàíöà; b2 — øèðèíà óäëèíåííîãî ôëàíöà; D — ïåðåêîñ ïîëêè; f — ïðîãèá ñòåíêè
×åðò. 2
Òàáëèöà 2, ìì
|
Ïàðàìåòð äâóòàâðà,
ïîêàçàòåëü êà÷åñòâà |
Ðàçìåð
|
Ïðåäåëüíûå îòêëîíåíèÿ ïðè òî÷íîñòè ïðîêàòêè |
|
ïîâûøåííîé |
îáû÷íîé |
|
Âûñîòà h
|
Äî 140 âêëþ÷. |
|
± 2,0 |
|
Ñâ. 140 ” 180 ” |
±2,0 |
±2,5 |
|
” 180 ” 300 ” |
|
± 3,0 |
|
” 300 ” 360 ” |
± 3,0 |
± 3,5 |
|
” 360 ” 600 ” |
±4,0 |
±4,0 |
|
Øèðèíà ïîëêè b
|
Äî 73 âêëþ÷. |
|
± 2,0 |
|
Ñâ. 73 ” 90 ” |
±2,0 |
± 2,5 |
|
” 90 ” 135 ” |
|
±3,0 |
|
” 135 ” 155 ” |
|
± 3,5 |
|
” 155 |
±3,0 |
±4,0 |
|
Òîëùèíà ïîëêè t*
|
Äî 7,5 âêëþ÷. |
– 0,4 |
– 0,7 |
|
Ñâ. 7,5 ” 8,9 ” |
– 0,5 |
– 0,7 |
|
” 8,9 ” 10,7 ” |
– 0,6 |
– 0,8 |
|
” 10,7 ” 12,3 ” |
– 0,7 |
|
|
” 12,3 ” 14,2 ” |
– 0,8 |
– 1,0 |
|
” 14,2 ” 15,2 ” |
– 0,9 |
|
|
” 15,2 |
– 1,0 |
– 1,2 |
|
Ïåðåêîñ ïîëêè D ïðè øèðèíå b |
Îò 55 äî 190 âêëþ÷. |
Íå áîëåå 0,0125 b |
Íå áîëåå
0,02 b |
|
Îòêëîíåíèå îò
ñèììåòðè÷íîñòè d
|
Äî 73 âêëþ÷. |
|
2,0 |
|
Ñâ. 73 ” 90 ” |
2,0 |
2,5 |
|
” 90 ” 135 ” |
|
3,0 |
|
ïðè øèðèíå b |
” 135 ” 145 ” |
|
3,5 |
|
” 145 |
3,0 |
4,0 |
|
Äëèíà |
Äî 8 ì âêëþ÷. |
+40 |
+40 |
|
Ñâ. 8 ì |
Ê äîïóñêó +40 ïðèáàâëÿòü ïî 5 ìì íà
êàæäûé ìåòð äëèíû ñâ. 8 ì |
+80 |
_____________
* Ïëþñîâûå îòêëîíåíèÿ îãðàíè÷èâàþòñÿ ïðåäåëüíûìè îòêëîíåíèÿìè ïî ìàññå.
5. Ïðîãèá ñòåíêè (f) íå äîëæåí ïðåâûøàòü 0,15 S.
6. Êðèâèçíà äâóòàâðà íå äîëæíà