Illinois Administrative Code
Title 77 - PUBLIC HEALTH
Part 870 - MANUFACTURED HOME INSTALLATION CODE
Table G - Pier Load and Minimum Pier Capacity for 16 Foot Wide Section (Pounds)
Roof Live Load (psf) |
Mating/Perimeter Wall Opening (feet) |
||||||||||
5 |
10 |
15 |
20 |
25 |
30 |
35 |
|||||
20 |
1200 |
2300 |
3500 |
4700 |
5800 |
7000 |
8100* |
||||
30 |
1600 |
3100 |
4700 |
6200 |
7800 |
9300* |
10900* |
||||
40 |
1900 |
3800 |
5800 |
7500 |
9700* |
11600* |
13600* |
||||
Soil's Load- Bearing Capacity (psf) |
Footing Area (square inches) |
||||||||||
1000 |
20 |
173 |
331 |
504 |
677 |
835 |
1008 |
1166 |
|||
30 |
230 |
446 |
677 |
893 |
1123 |
1339 |
1570 |
||||
40 |
274 |
547 |
835 |
1080 |
1397 |
1670 |
1958 |
||||
1500 |
20 |
144 |
221 |
336 |
451 |
557 |
672 |
778 |
|||
30 |
154 |
298 |
451 |
595 |
749 |
893 |
1046 |
||||
40 |
182 |
365 |
557 |
720 |
931 |
1114 |
1306 |
||||
2000 |
20 |
144 |
165 |
252 |
338 |
418 |
504 |
583 |
|||
30 |
144 |
223 |
338 |
446 |
562 |
670 |
785 |
||||
40 |
144 |
144 |
418 |
540 |
698 |
835 |
979 |
||||
3000 |
20 |
144 |
144 |
168 |
226 |
278 |
336 |
389 |
|||
30 |
144 |
149 |
226 |
298 |
374 |
446 |
523 |
||||
40 |
144 |
182 |
278 |
360 |
466 |
557 |
653 |
||||
4000 |
20 |
144 |
144 |
144 |
169 |
209 |
252 |
292 |
|||
30 |
144 |
144 |
169 |
223 |
281 |
335 |
392 |
||||
40 |
144 |
144 |
209 |
270 |
349 |
418 |
490 |
* Individual supports shall NOT support loads greater than 8000 pounds for a single stack of 8"x8"x16" stack of blocks, 14000 pounds for a double stack.