SPIRAL STAIRCASE INSTALLATION GUIDE
37
1
/
2
”
4 Bolt Spaces
28
1
/
8
”
3 Bolt Spaces
37
1
/
2
”
4 Bolt Spaces 9
3
/
8
”
8 Bolt Spaces @ 4
11
/
16
”
PLATFORM LAYOUT:
The platform rests 12” below the eave and the A-frame brackets are 4 bolt spaces apart (37-1/2”). It is
recommended to place two thirds of the platform under the roof ladder with the remainder under the
manhole. The stair section assembly attaches to the platform and has an A-frame 3 bolt spaces (28
1/8”) from the platform A-frame. The stair section is included in the platform package.
1 of 16(800) 667-5904 | www.meridianmfg.com | [email protected]
Fig 1 - Platform layout
IMPORTANT:
It is necessary to have the correct
spacing between bin walls before
installing the spiral staircase:
- Single Platform: 32” - 34”
- Dual Platform: 64” - 66”
2 of 16 10.2020
Spiral Staircase Installation Guide
18
3
/
4
”
2 Bolt Spc
28
1
/
8
”
3 Bolt Spc
37
1
/
2
”
4 Bolt Spc
28
1
/
8
”
3 Bolt Spc
INTERMEDIATE PLATFORM LAYOUT (OPTIONAL EQUIPMENT):
1. The platform should be laid out with the longer end toward the upward run of the stairs.
2. From the top down, the brackets are spaced 2, 3, 3 in terms of bolt spacing:
- TWO from the last stair section.
- THREE from the first middle platform wall bracket.
- THREE from the last middle platform wall bracket to the next stair wall bracket.
3. Platform A-frame wall brackets should be assembled like the platform layout shows in Figure 4.
Fig 2 - Intermediate platform layout
10.2020 3 of 16
Spiral Staircase Installation Guide
51722 WALL BRACE
51702 BRACE
51720 ANGLE BRACE
18
/
"
2 Bolt Spc
51720
ANGLE BRACE
51722
WALL BRACE
51718 BASE
SUPPORT POST
51703 BASE SUPPORT POST
Bottom Bracket Platform Bracket Stair Bracket
51706
BASE POST B
51705 BASE PAD
51722 WALL BRACE
51702 BRACE
51720 ANGLE BRACE
18
/ "
2 Bolt Spc
51720
ANGLE BRACE
51722
WALL BRACE
51718 BASE
SUPPORT POST
51703 BASE SUPPORT POST
Bottom Bracket Platform Bracket Stair Bracket
51706
BASE POST B
51705 BASE PAD
Fig 3 - Staircase layout
Fig 4 - Assemble A-Frames
4 of 16 Revised 10.2020
Spiral Staircase Installation Guide
Detail C
Scale 1/6
Middle Splice
Detail A
Scale 1/6
Top End
51725
SIDERAIL
Detail B
Scale 1/6
Bottom End
C
B
A
51725 SIDERAIL
51728 INSIDE SIDERAIL
51698 STAIR STEP
Detail C
Scale 1/6
Middle Splice
Detail A
Scale 1/6
Top End
51725
SIDERAIL
Detail B
Scale 1/6
Bottom End
C
B
A
51725 SIDERAIL
51728 INSIDE SIDERAIL
51698 STAIR STEP
ASSEMBLE STAIR SECTIONS:
Note: Painted end of Side Rails are always UP
The basic stair section has five steps.
4. The A-frame attaches 4 bolt spaces (37 1/2”) from the preceding A-frame.
5. The outside siderail on the stair sections are two pieces.
6. Attach the steps and tighten the steps to the inside siderail.
7. Tighten the round-hole connection to the outside side rail, but leave the slot connections loose for
later adjustments.
Fig 5 - Staircase layout
Fig 6 - Staircase detail
Note:
Stair Step Dimensions:
24 1/8” x 9” x 1 3/4”
10.2020 5 of 16
Spiral Staircase Installation Guide
ASSEMBLE TO PLATFORM:
These instructions are for putting the stairs on as the bin is being built.
8. Attach the platform A-frame to begin installation.
IMPORTANT: See wall bracket layout drawing for up and down indicators
9. Attach the mid-brace to the bottom of the platform skin through the pre-punched holes.
10. Attach platform skin to A-frames with the four short platform mount posts.
11. Attach the platform posts and the kick board post to the corners of the platform.
Detail C
Scale 1/9
Detail D
Scale 1/9
Detail E
Scale 1/9
51723
SHORT
POST
51722
WALL
BRACE
51720
ANGLE
BRACE
51702 Brace
51712
51716
51723
SHORT
POST
51719
PLATFORM
SIDE HANDRAIL
E
C
D
51701
PLATFORM
END MIDRAIL
51708
PLATFORM
END
KICKBOARD
51707 PLATFORM
END HANDRAIL
Detail C
Scale 1/9
Detail D
Scale 1/9
Detail E
Scale 1/9
51723
SHORT
POST
51722
WALL
BRACE
51720
ANGLE
BRACE
51702 Brace
51712
51716
51723
SHORT
POST
51719
PLATFORM
SIDE HANDRAIL
E
C
D
51701
PLATFORM
END MIDRAIL
51708
PLATFORM
END
KICKBOARD
51707 PLATFORM
END HANDRAIL
Fig 7 - Platform corner detail
Fig 8 - Platform railing and support
51725 SIDERAIL
Note:
Platform Skin Dimensions:
50 1/2” x 24” x 3”
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Spiral Staircase Installation Guide
Outside Siderail Connection Inside Entry Detail
51727
SIDERAIL
ATTACH THE KICK BOARDS, HAND AND INTERMEDIATE RAILS:
12. Attach stair section to platform with the hole in the platform skin and the bottom hole of the posts
on the inside and outside siderail.
- The shallow holes on the outside siderail are for smaller bins (type 60’ and under) and the deep
holes are for larger bins.
13. The top of the siderail is flush with the deck to clear the kickboard.
14. Keep the inside siderail as close to the centre of the adjustment slot as possible to keep the stairs
from creeping forward down the bin.
- Continue to monitor this as you put successive sections on by watching the connections of the
short post to the siderail.
- Stay as close as possible to the centre to keep the post plumb.
15. Tighten stair sections from the inside out and from the top down.
- Always level the bottom step before tightening the outside siderail splice.
- Use the slotted connection on the outside siderail to adjust steps for even fan pattern.
16. Tighten all connections.
Fig 9 - Kickboard and rails
10.2020 7 of 16
Spiral Staircase Installation Guide
ATTACH STAIR SECTIONS:
17. Attach the A-frame to the bottom of the siderail using the top hole on the short post and the top
hole (of the two) in the baluster post directly above the wall cross.
- After jacking the bin, the A-frame will fit into place and be ready to attach the bin wall.
18. The bin wall brackets call for one bolt at the top and bottom of the bracket on the horizontal bolt
seam, see Figure 1.
19. When attaching the next stair sections, use the same procedure as the stair section on the
platform, except level the middle step and tighten the upper splice.
20. Level the bottom step and tighten the middle splice. The wall brackets assemblies are placed at
4 bolt spaces (37 1/2”) around the bin.
ASSEMBLY AND FINISHING OF BOTTOM SECTION:
21. Attach the “51700 Bottom Knee Brace” to the rear inside hole of the bottom step.
22. Attach the other end of bottom knee brace to “51722 Wall Brace” in the hole that would normally
have a knee brace as pictured on page 9.
Note: On some bin diameters this may not work. If the stair system has to be
severely deformed to use the hole, drill the hole to allow for connection.
23. Attach the “51710 Bottom Brace” to the inside and outside siderails under the bottom step so to
not be in the walk path when coming off the step.
- On bins with a rolled flange bottom ring, it may be necessary to move the bottom brace up to the
step bolts for the upper holes.
24. If possible, attach the bottom post to the bottom brace bracket.
- If that causes the post to be misaligned with the hand and midrails, then attaching them
separately to the outside siderail will be adequate.
Fig 10 - 51700 Bottom Knee Brace Fig 11 - 51710 Bottom Brace
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Spiral Staircase Installation Guide
18
3
/
4
”
2 Bolt Spaces
51715 MIDRAIL
51703 BASE SUPPORT POST
51724 HANDRAIL
51706
BASE POST
ATTACH BOTTOM SECTION:
The bottom section uses a special configuration of
the A-frame.
- For assembly, see the A-frame drawing,
see Figure 4.
It attaches in the middle of the stair section and
is two bolt spaces (18 3/4”+/-) from the last wall
mount.
There is a baluster post, bottom brace bracket,
and bottom knee brace included with the platform
that attaches to the bottom of the bottom section.
- This allows the handrail to end at the bottom of
the stairs and braces the bottom two steps and
post.
Note: Gate is optional equipment.
ATTACH HANDRAIL:
Shape the handrails according
to the circumference of the
bin and attach them to the
baluster posts.
Midrails bolt on the posts
through the slots and are to be
entered between each baluster
post.
Fig 12 - Image of the optional gate
Fig 13 - Handrail assembly
Revised 10.2020 9 of 16
Spiral Staircase Installation Guide
51720
ANGLE BRACE
51722
WALL BRACE
51707 PLATFORM END HANDRAIL
51707 PLATFORM END HANDRAIL
51701
PLATFORM
END MIDRAIL
51701
PLATFORM
END MIDRAIL
51729
PLATFORM
SKIN
51721
PLATFORM
POST
51721
PLATFORM
POST
TWIN PLATFORM (OPTIONAL EQUIPMENT):
On standard 32" and 44" bin sheets the platform Wall Brackets will attach 4 bolts (35.5") apart.
a. Attach Wall Brace to the bin.
b. In the lowest hole of the Wall Brace attach Angle Braces.
c. Assemble Platform.
d. On the Platform skin, attach Posts to corners as shown.
e. Attach Platform to Wall Braces using the holes in the post under the platform skin and the
bottom hole of the Post to the Wall Brace.
f. Attach Angle Braces to the 2nd and 3rd holes from the bottom of the Posts.
g. Attach Handrail on the outside of the Posts.
h. Tighten Platform.
Twin bin spacing must be 64–68" between bins.
Fig 14 - Twin platform assembly
Note:
Platform Skin Dimensions:
50 1/2” x 24” x 3”
10 of 16 Revised 10.2020
Spiral Staircase Installation Guide
CENTRE SECTION PARTS
Table 1 - 9 Ring Bin Staircase Pkg
ITEM PART # DESCRIPTION
1 51698 STAIR STEP - 24-1/8” x 9” x 1-3/4”
12 51709 SHORT POST
17 51714 HORIZONTAL SUPPORT
18 51715 MIDRAIL
21 51718 BASE SUPPORT POST
23 51720 ANGLE BRACE
25 51722 WALL BRACE
27 51724 HANDRAIL
28 51725 SIDERAIL
31 51728 45 INSIDE SIDERAIL
21
17
23
??
1
18
27 12
31
25
28
28
Fig 15 - Centre section
Revised 10.2020 11 of 16
Spiral Staircase Installation Guide
29
16
20
??
30
21
12
25
17 1
STAIRS TO PLATFORM TOP CONNECTION PARTS
Table 2 - 9 Ring Bin Staircase Pkg
ITEM PART # DESCRIPTION
1 51698 STAIR STEP - 24-1/8” x 9” x 1-3/4”
12 51709 SHORT POST
16 51713 MIDRAIL
17 51714 HORIZONTAL SUPPORT
20 51717 HANDRAIL
21 51718 BASE SUPPORT POST
25 51722 WALL BRACE
29 51726 SIDERAIL
30 51727 SIDERAIL
Fig 16 - Stair to platform
12 of 16 Revised 10.2020
Spiral Staircase Installation Guide
11
32
26
17
1915
22
23
25
7
5
24
10
4
PLATFORM SECTION PARTS
Table 3 - 9 Ring Bin Staircase Pkg
ITEM PART # DESCRIPTION QTY
4 51701 PLATFORM END MIDRAIL 1
5 51702 BRACE 1
7 51704 PLATFORM SHORT POST 1
10 51707 PLATFORM END HANDRAIL 1
11 51708 PLATFORM END KICKBOARD 1
15 51712 PLATFORM SIDE MIDRAIL 1
17 51714 HORIZONTAL SUPPORT 10
19 51716 PLATFORM SIDE KICKBOARD 2
22 51719 PLATFORM SIDE HANDRAIL 1
23 51720 ANGLE BRACE 11
24 51721 PLATFORM POST 3
25 51722 WALL BRACE 11
26 51723 SHORT POST 4
32 51729 PLATFORM SKIN - 50-1/2” x 24” x 3” 1
Fig 17 - Platform section
Revised 10.2020 13 of 16
Spiral Staircase Installation Guide
25
26
23
5
24
4
10
10
4
24
TWIN PLATFORM PARTS
Table 4 - 9 Ring Bin Staircase Pkg
ITEM PART # DESCRIPTION QTY
4 51701 PLATFORM END MIDRAIL 1
5 51702 BRACE 1
10 51707 PLATFORM END HANDRAIL 1
23 51720 ANGLE BRACE 11
24 51721 PLATFORM POST 3
25 51722 WALL BRACE 11
26 51723 SHORT POST 4
32 51729 PLATFORM SKIN - 50-1/2” x 24” x 3” 1
Fig 18 - Twin platform
14 of 16 Revised 10.2020
Spiral Staircase Installation Guide
BOTTOM SECTION PARTS
31
17
23
??
1
18
21
27
12
1725
31
25
6
28
9
8
28
Table 5 - 9 Ring Bin Staircase Pkg
ITEM PART # DESCRIPTION QTY
1 51698 STAIR STEP - 24-1/8” x 9” x 1-3/4” 43
8 51705 BASE PAD 1
9 51706 BASE POST B 1
12 51709 SHORT POST 10
17 51714 HORIZONTAL SUPPORT 10
18 51715 MIDRAIL 8
21 51718 BASE SUPPORT POST 10
23 51720 ANGLE BRACE 11
25 51722 WALL BRACE 11
27 51724 HANDRAIL 8
28 51725 SIDERAIL 16
31 51728 45 INSIDE SIDERAIL 8
Fig 19 - Bottom section
ITEM QTY MASS PART # DESCRIPTION
1 43 5.399 lbmass 51698
STAIR STEP 1007
2 1 5.606 lbmass 51699 BOTTOM PLATFORM 1???
3 2 1.414 lbmass 51700 BOTTOM KNEE BRACE 1026
4 1 0.984 lbmass 51701 PLATFORM END MIDRAIL 1011
5
1 1.800 lbmass 51702 BRACE 1008
6 1 1.972 lbmass 51703
BASE SUPPORT POST 1018
7 1 1.008 lbmass 51704 PLATFORM SHORT POST 1025
8 1 1.341 lbmass 51705 BASE PAD 1040
9 1 2.732 lbmass 51706 BASE POST B 1028
10 1 1.682 lbmass 51707 PLATFORM END HANDRAIL 1013
11 1 2.185 lbmass 51708 PLATFORM END KICKBOARD 1015
12 10 1.512 lbmass 51709
SHORT POST 1021
13 1 4.638 lbmass 51710 BOTTOM BRACE 1024
14 1 5.834 lbmass 51711 POST 1016
15 1 2.100 lbmass 51712 PLATFORM SIDE MIDRAIL 1010
16 1 2.729 lbmass 51713 MIDRAIL 1030
ITEM QTY MASS PART # DESCRIPTION
17 10 3.981 lbmass 51714
HORIZONTAL SUPPORT 1003
18 8 3.878 lbmass 51715 MIDRAIL 1019
19 2 4.754 lbmass 51716 PLATFORM SIDE KICKBOARD 1014
20 1 3.572 lbmass 51717 HANDRAIL 1031
21 10 5.541 lbmass 51718 BASE SUPPORT POST 1001
22 1 3.576 lbmass 51719
PLATFORM SIDE HANDRAIL 1012
23 11 3.192 lbmass 51720 ANGLE BRACE 1045
24 3 5.641 lbmass 51721 PLATFORM POST 1009
25 11 3.778 lbmass 51722 WALL BRACE 1002
26 4 0.476 lbmass 51723 SHORT POST 1029
27 8 5.260 lbmass 51724 HANDRAIL 1020
28 16 7.053 lbmass 51725
SIDERAIL 1006
29 1 8.713 lbmass 51726 SIDERAIL 1032
30 1 9.373 lbmass 51727 SIDERAIL 1???
31 8 12.976 lbmass 51728 45 INSIDE SIDERAIL 1005
32 1 26.490 lbmass 51729 PLATFORM SKIN 1023
40668
PROJECT/CUSTOMER NAME:
9 RING BIN STAIRCASE PKG
PART DESCRIPTION:
SPIRAL STAIRS
A
PART/DRAWING NUMBER:
REV:
10/18/2019
SCALE: SHEET No:
BP DS
DRAWN BY DATE:DRAWN BY:
WEIGHT:
828.06 lbmass
1 OF 1 1 / 58
www.meridianmfg.com
CHECKED BY:
FABRICATION: XXX
MATERIAL:
THIS DRAWING IS THE EXCLUSIVE PROPERTY OF MERIDIAN
MFG INC. DUPLICATION BY ANY MEANS IS PROHIBITED
WITHOUT PERMISSION FROM MERIDIAN MFG INC.
A BP
REVISION HISTORY
REV DESCRIPTION DATE DESIGNER
11
32
29
13
17
15
22
20
30 31 271619
4
21
14
24
18
23
25
26
7
28
1
128109 2
3536
STAIR AND PLATFORM DIMENSIONS:
- 51698 STAIR STEP - 24-1/8” x 9” x 1-3/4”
- 51729 PLATFORM SKIN - 50-1/2” x 24” x 3”
(800) 667-5904 | www.meridianmfg.com | [email protected]
©2020 Meridian Manufacturing Inc. Registered Trademarks Used Under License. Printed in Canada (10/2020) Revision 1
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