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Willamette StrucJoist SJ-32-42-55 StrucJoist SJ-32-42-55 - Page 6
TABLE VII
| |
SJ-32 Roof Load Table
Allowable Load in Pounds per Lineal Foot |
| Span (ft) |
9-1/2" |
11-7/8" |
14" |
16" |
| Deft l/240 |
Total Load |
Defl l/240 |
Total Load |
Defl l/240 |
Total Load |
Defl l/240 |
Total Load |
| 115% |
125% |
115% |
125% |
115% |
125% |
115% |
125% |
| 10 |
|
233 |
253 |
|
270 |
294 |
|
270 |
294 |
|
270 |
294 |
| 11 |
|
193 |
210 |
|
246 |
267 |
|
246 |
267 |
|
246 |
267 |
| 12 |
|
163 |
177 |
|
218 |
236 |
|
226 |
245 |
|
226 |
245 |
| 13 |
|
139 |
151 |
|
186 |
202 |
|
209 |
227 |
|
209 |
227 |
| 14 |
|
120 |
131 |
|
161 |
175 |
|
194 |
211 |
|
194 |
211 |
| 15 |
|
105 |
114 |
|
140 |
152 |
|
181 |
197 |
|
181 |
197 |
| 16 |
|
92 |
100 |
|
123 |
134 |
|
170 |
185 |
|
170 |
185 |
| 17 |
|
82 |
89 |
|
110 |
119 |
|
160 |
174 |
|
160 |
174 |
| 18 |
|
73 |
80 |
|
98 |
106 |
|
151 |
165 |
|
151 |
165 |
| 19 |
63 |
66 |
72 |
|
88 |
96 |
|
144 |
156 |
|
144 |
156 |
| 20 |
55 |
59 |
65 |
|
79 |
86 |
|
136 |
148 |
|
136 |
148 |
| 21 |
48 |
54 |
59 |
|
72 |
78 |
|
130 |
141 |
|
130 |
141 |
| 22 |
42 |
49 |
54 |
|
66 |
72 |
|
119 |
130 |
|
124 |
135 |
| 23 |
37 |
45 |
49 |
|
60 |
65 |
106 |
109 |
119 |
|
119 |
129 |
| 24 |
32 |
41 |
43 |
54 |
55 |
60 |
94 |
101 |
109 |
|
114 |
124 |
| 25 |
29 |
38 |
38 |
48 |
51 |
56 |
84 |
93 |
101 |
|
109 |
118 |
| 26 |
|
|
|
43 |
47 |
51 |
75 |
86 |
93 |
|
101 |
110 |
| 27 |
|
|
|
39 |
44 |
48 |
67 |
80 |
87 |
91 |
94 |
102 |
| 28 |
|
|
|
35 |
41 |
44 |
60 |
74 |
80 |
82 |
87 |
95 |
| 29 |
|
|
|
31 |
38 |
41 |
55 |
69 |
73 |
74 |
81 |
88 |
| 30 |
|
|
|
28 |
36 |
38 |
50 |
65 |
66 |
67 |
76 |
82 |
| 31 |
|
|
|
|
|
35 |
45 |
60 |
60 |
61 |
71 |
77 |
| 32 |
|
|
|
|
|
|
41 |
55 |
55 |
56 |
67 |
73 |
| 33 |
|
|
|
|
|
|
38 |
50. |
50 |
51 |
63 |
68 |
| 34 |
|
|
|
|
|
|
35 |
46 |
46 |
47 |
59 |
62 |
| 35 |
|
|
|
|
|
|
32 |
42 |
42 |
43 |
56 |
57 |
| 36 |
|
|
|
|
|
|
29 |
39 |
39 |
40 |
53 |
53 |
| 37 |
|
|
|
|
|
|
27 |
36 |
36 |
37 |
49 |
49 |
| 38 |
|
|
|
|
|
|
|
|
|
34 |
45 |
45 |
| 39 |
|
|
|
|
|
|
|
|
|
31 |
42 |
42 |
| 40 |
|
|
|
|
|
|
|
|
|
29 |
39 |
39 |
| |
SJ-42 Roof Load Table Allowable
Load in Pounds per Lineal Foot |
| Span (ft) |
9-1/2" |
11-7/8" |
14" |
16" |
| Defl l/240 |
Total Load |
Defl l/240 |
Total Load |
Defl l/240 |
Total Load |
Defl l/240 |
Total Load |
| 115% |
125% |
115% |
125% |
115% |
125% |
115% |
125% |
| 10 |
|
253 |
275 |
|
288 |
313 |
|
288 |
313 |
|
288 |
313 |
| 11 |
|
231 |
251 |
|
262 |
285 |
|
262 |
285 |
|
262 |
285 |
| 12 |
|
212 |
230 |
|
241 |
262 |
|
241 |
262 |
|
241 |
262 |
| 13 |
|
196 |
213 |
|
223 |
242 |
|
223 |
242 |
|
223 |
242 |
| 14 |
|
182 |
198 |
|
207 |
225 |
|
207 |
225 |
|
207 |
225 |
| 15 |
|
170 |
185 |
|
193 |
210 |
|
193 |
210 |
|
193 |
210 |
| 16 |
|
160 |
173 |
|
182 |
197 |
|
182 |
197 |
|
182 |
197 |
| 17 |
137 |
150 |
163 |
|
171 |
186 |
|
171 |
186 |
|
171 |
186 |
| 18 |
118 |
142 |
154 |
|
162 |
176 |
|
162 |
176 |
|
162 |
176 |
| 19 |
101 |
135 |
135 |
|
153 |
166 |
|
153 |
166 |
|
153 |
166 |
| 20 |
88 |
117 |
117 |
144 |
146 |
158 |
|
146 |
158 |
|
146 |
158 |
| 21 |
76 |
102 |
102 |
126 |
139 |
151 |
|
139 |
151 |
|
139 |
151 |
| 22 |
67 |
89 |
89 |
111 |
132 |
144 |
|
132 |
144 |
|
132 |
144 |
| 23 |
59 |
79 |
79 |
98 |
126 |
131 |
|
127 |
138 |
|
127 |
138 |
| 24 |
52 |
70 |
70 |
87 |
116 |
116 |
|
122 |
132 |
|
122 |
132 |
| 25 |
47 |
62 |
62 |
77 |
103 |
103 |
112 |
117 |
127 |
|
117 |
127 |
| 26 |
42 |
56 |
56 |
69 |
92 |
92 |
100 |
112 |
122 |
|
112 |
122 |
| 27 |
37 |
50 |
50 |
62 |
83 |
83 |
90 |
108 |
118 |
|
108 |
118 |
| 28 |
34 |
45 |
45 |
56 |
75 |
75 |
81 |
104 |
108 |
|
104 |
113 |
| 29 |
30 |
41 |
41 |
51 |
68 |
68 |
74 |
98 |
98 |
99 |
101 |
110 |
| 30 |
28 |
37 |
37 |
46 |
61 |
61 |
67 |
89 |
89 |
90 |
97 |
106 |
| 31 |
|
|
|
42 |
56 |
56 |
61 |
81 |
81 |
82 |
94 |
102 |
| 32 |
|
|
|
38 |
51 |
51 |
56 |
74 |
74 |
75 |
91 |
99 |
| 33 |
|
|
|
35 |
47 |
47 |
51 |
68 |
68 |
68 |
89 |
91 |
| 34 |
|
|
|
32 |
43 |
43 |
47 |
62 |
62 |
63 |
84 |
84 |
| 35 |
|
|
|
30 |
39 |
39 |
43 |
57 |
57 |
58 |
77 |
77 |
| 36 |
|
|
|
27 |
36 |
36 |
40 |
53 |
53 |
53 |
71 |
71 |
| 37 |
|
|
|
|
|
|
37 |
49 |
49 |
49 |
66 |
66 |
| 38 |
|
|
|
|
|
|
34 |
45 |
45 |
46 |
61 |
61 |
| 39 |
|
|
|
|
|
|
31 |
42 |
42 |
42 |
57 |
57 |
| 40 |
|
|
|
|
|
|
29 |
39 |
39 |
39 |
53 |
53 |
| |
SJ-55
Roof Load Table Allowable Load in Pounds per
Lineal Foot |
| Span (ft) |
11-7/8" |
14" |
16" |
| Defl l/240 |
Total Load |
Defl l/240 |
Total Load |
Defl l/240 |
Total Load |
| 115% |
125% |
115% |
125% |
115% |
125% |
| 10 |
|
315 |
342 |
|
315 |
342 |
|
315 |
342 |
| 11 |
|
287 |
312 |
|
287 |
312 |
|
287 |
312 |
| 12 |
|
264 |
286 |
|
264 |
286 |
|
264 |
286 |
| 13 |
|
244 |
265 |
|
244 |
265 |
|
244 |
265 |
| 14 |
|
226 |
246 |
|
226 |
246 |
|
226 |
246 |
| 15 |
|
212 |
230 |
|
212 |
230 |
|
212 |
230 |
| 16 |
|
199 |
216 |
|
199 |
216 |
|
199 |
216 |
| 17 |
|
187 |
203 |
|
187 |
203 |
|
187 |
203 |
| 18 |
|
177 |
192 |
|
177 |
192 |
|
177 |
192 |
| 19 |
|
168 |
182 |
|
168 |
182 |
|
168 |
182 |
| 20 |
|
159 |
173 |
|
159 |
173 |
|
159 |
173 |
| 21 |
143 |
152 |
165 |
|
152 |
165 |
|
152 |
165 |
| 22 |
125 |
145 |
158 |
|
145 |
158 |
|
145 |
158 |
| 23 |
110 |
139 |
147 |
|
139 |
151 |
|
139 |
151 |
| 24 |
98 |
131 |
131 |
|
133 |
145 |
|
133 |
145 |
| 25 |
87 |
116 |
116 |
126 |
128 |
139 |
|
128 |
139 |
| 26 |
78 |
104 |
104 |
113 |
123 |
133 |
|
123 |
133 |
| 27 |
70 |
93 |
93 |
101 |
118 |
129 |
|
118 |
129 |
| 28 |
63 |
84 |
84 |
91 |
114 |
122 |
|
114 |
124 |
| 29 |
57 |
76 |
76 |
83 |
110 |
110 |
|
110 |
120 |
| 30 |
52 |
69 |
69 |
75 |
100 |
100 |
101 |
107 |
116 |
| 31 |
47 |
63 |
63 |
68 |
91 |
91 |
92 |
103 |
112 |
| 32 |
43 |
57 |
57 |
62 |
83 |
83 |
84 |
100 |
109 |
| 33 |
39 |
52 |
52 |
57 |
76 |
76 |
77 |
97 |
103 |
| 34 |
36 |
48 |
48 |
52 |
70 |
70 |
71 |
94 |
94 |
| 35 |
33 |
44 |
44 |
48 |
64 |
64 |
65 |
87 |
87 |
| 36 |
30 |
41 |
41 |
44 |
59 |
59 |
60 |
80 |
80 |
| 37 |
28 |
37 |
37 |
41 |
55 |
55 |
55 |
74 |
74 |
| 38 |
26 |
35 |
35 |
38 |
50 |
50 |
51 |
68 |
68 |
| 39 |
|
|
|
35 |
47 |
47 |
47 |
63 |
63 |
| 40 |
|
|
|
33 |
43 |
43 |
44 |
59 |
59 |
Notes:
- All roof joists to be sloped 1/4" per foot minimum and
use of these tables is limited to roof slopes of 3 1/2" per foot maximum. Use
StrucJoist roof span table for greater slopes.
- Total load values are based on single joists spaced at
24" o.c. or less (repetitive member). Double joists should be designed using
StrucJoist design properties.
- Total load deflection is limited to L/180. For stiffer
deflection criteria, use the L/240 column.
- Allowable loads shown may be used for simple or multiple
spans. Outermost spans in multiple-span applications must be at least 40% of adjacent
span.
- Spans are based on clear distance between supports.
- Web stiffeners are required at interior supports of
multiple spans.
- Contact Willamette Technical Support at 1 -800-942-9927 for
applications with holes.
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