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198934 Roof Stairs INSTALLATION INSTRUCTIONS.pdf - Westeel

198934 Roof Stairs INSTALLATION INSTRUCTIONS.pdf - Westeel

ROOF STAIR MODULE

ROOF STAIR MODULE LAYOUTS ROOF STAIRS (in assembly order) BIN MODEL STAIR TREAD MODULES 15' 5 18' 7 21' 8 24' 6 5 27' 5 7 30' 7 6 33' 8 7 36' 8 8 39' 5 7 7 42' 7 6 7 45' 6 8 8 48' 8 8 7 51' 5 7 7 7 54' 7 7 7 6 60' 8 8 7 7 66' 6 6 6 8 8 72' 8 8 8 7 7 78' 7 7 7 7 7 7 84' 5 5 7 7 7 7 7 90' 8 8 8 8 8 8 96' 6 6 8 8 8 8 8 102' 7 7 7 7 7 7 7 7 108' 5 5 8 8 8 8 8 8 SHADED MODULE IS THE BOTTOM MODULE (supplied with short hand and mid rails) NON COMMON PART NUMBERS DESCRIPTION 5 TREAD 6 TREAD 7 TREAD 8 TREAD MODULE MODULE MODULE MODULE STRINGER RIGHT 234059 234057 234055 234053 STRINGER LEFT 234058 234056 234054 234052 HAND RAIL 234065 234066 234067 234068 MIDDLE RAIL 234060 234061 234062 234063 SHORT HAND RAIL* 234087 234088 234089 234090 SHORT MIDDLE RAIL* 234071 234072 234073 234074 * SUPPLIED FOR BOTTOM MODULE ONLY Page 16

Roof Stair Assembly – The following assembly instructions should be used in combination with the layouts provided in the Layout Section for the bin diameter under construction. The layouts provide part numbers, and relative positioning of the principle components. 1. In general 3/8” x 1” bolts and nuts are used unless noted otherwise. The best method of construction would be to conduct as much of the assembly on the ground, as possible, and then lift the completed assembly into place and secure to the bin roof structure. Z-SECTION BOLTS ON SUCH THAT THE FLANGE WITH MULTIPLE SLOTS POINTS DOWN THE ROOF AND MATES WITH THE ROOF RIBS. Figure 6 MATING STRINGER SECTIONS OVERLAP. BOTTOM FLANGES POINT OUTWARD. 2. If multiple stringer sections are being utilized, assemble these sections together. Consult the Layout Section for the bin diameter in question, for the part numbers being utilized, and the location of each. Note that there are left and right stringer section sections and the stringer flanges point outwards. It is also necessary to bolt on the stair treads at this time. For the larger bin diameters with many stair modules it would be desirable to assemble the stair in manageable parts and bolt the mating assemblies together as they are fitted to the roof. CENTER STAIR ASSEMBLY ON UNDERLYING ROOF PANEL. Figure 7 3. Z-supports bolt to the stringers at the hole locations in the bottom flanges. There should be a Z-support at every hole location. Note that the flange with the multiple slots is positioned downwards and mates to the roof ribs. On the top flange of the Z-support there are three possible bolting locations. These allow the roof stairs to be shifted to the right or left in relation to the underlying roof panels if this is desirable. In general the center bolting location should be used. However at the bottom end of the roof stairs, it may be desirable to shift the Z- support to the right or left if there is the possibility of it interfering with the operation of the inspection hatch, or if it interferes with the use of the internal ladder sections. LOWER Z- SUPPORT SHIFTED TO AVOID INSPECTION HATCH Figure 8 Page 17

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