DESIGN OF PURLINS REVISED-2005.xls

	A	B	C	D	E	F	G	H	I	J
1
2
3	DESIGN OF PURLINS						Date:	03/06/26
4
5	NAME OF BUILDING			:	PROPOSED 2 STOREY HOUSING UNIT
6	PURLIN DESIGNATION			:	P – 1
7
8	SPECIFICATIONS:
9
10	Type of section			:	Channel
11	Placing of sag rods			:	none
12	Slope of roofing			:	0.20
13	Spacing of truss			:	3.00	m
14	Spacing of purlins			:	0.60	m
15
16	loadings:
17
18	Weight of roofing			:	77.00	Pa
19	Other vertical loads			:	800.00	Pa
20	Wind load (normal projection)			:	704.00	Pa
21	Yield strength of steel			:	230.00	Mpa
22	Modulus of Elasticity			:	200.00	Gpa
23
24	suggested section:
25		Designation		H	B	TW	TF	A	W
26		LC 65x30x15x1.2		65.00	30.00	1.20	1.20	1.77	1.39
27		XC	YC	IX	IY	SX	SY	ASEP	BSTRESS
28		0.00	0.00	11.40	2.50	3.51	1.35	TRUE	123.60
29	RESULT:
30
31	Moment
32	Mn=	595.52	N-m	Mt=	119.10	N-m
33	flexural stress
34	fbx=	169.66	Mpa	Fbx=	151.80	Mpa
35	fby=	176.45	Mpa	Fby=	138.00	Mpa
36
37	interaction equation					deflection
38						y allow =	L / 180
39	case#	2					16.67	mm
40			.75(DL+LL)	governs
41						yn =	33.02	mm <	16.67	FAILS
42	(fbx / Fbx )+ (fby / Fby) < = 1.0					yt =	22.33	mm <	16.67	FAILS
43		2.40	< = 1.0	FAILS
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100