METALLIC SCISSOR SHOE PRIMARY SEAL

INSTALLATION GUIDE

Revised: January 2005

METALLIC SCISSOR SHOE PRIMARY SEAL

INSTALLATION GUIDE THIS BOOKLET IS DESIGNED AS A GUIDE ONLY AND DESCRIBES AN INSTALLATION TECHNIQUE THAT HAS PROVEN TO BE EFFICIENT. WE RECOMMEND THIS BOOKLET BE THROUGHLY REVIEWED BY THE CREW FOREMAN AND THE INFORMATION SHARED WITH THE ENTIRE CREW PRIOR TO SHOE SEAL INSTALLATION. HMT IS AVAILABLE TO ANSWER QUESTIONS AND TO ASSIST IN THE EXPLANATION OF THESE PROCEDURES. HMT SUPERVISORS ARE AVAILABLE FOR PERSONAL INSTRUCTION AT A DAILY RATE PLUS EXPENSES.

SAFETY NOTE:…………………………………………………………………… PRIOR TO ENTERING THE FIREWALL, SECONDARY CONTAINMENT, OR CLIMBING/ENTERING THE TANK, ENSURE THAT THE TANK IS SAFE FOR ENTRY AND THAT ALL APPLICABLE PERMITS HAVE BEEN OBTAINED (ENTRY, HOT WORK, CONFINED SPACE, ETC.). SAFETY NOTE:…………………………………………………………………… ENSURE THAT ALL PIPING HAS BEEN PROPERLY BLINDED AND THAT ALL VALVES ARE LOCKED OR TAGGED OUT. SAFETY NOTE:…………………………………………………………………… CHECK ALL INTERNAL TANK PIPING, VALVES, INCLUDING ROOF SUPPORT COLUMNS, FLOATING SUCTION LINES, GAUGE POLES, ETC. FOR PRODUCT CONTAINMENT AND FOR PROPER BLOCKING AND BLINDING. DO NOT ASSUME A TANK IS SAFE FOR ENTRY UNTIL ALL ENTRAPMENT AREAS ARE EXAMINED.

SAFETY NOTE:…………………………………………………………………………… FOLLOW ALL CUSTOMER, GOVERNMENTAL, AND HMT SAFETY PROCEDURES AT ALL TIMES.

TABLE OF CONTENTS 1.0 General Requirements

……………………………………………………………………………………………5

2.0 Unload Materials

……………………………………………………………………………………………5

3.0 Preparation for Shoe Installation

……………………………………………………………………………………………7

4.0 Shoe Installation

……………………………………………………………………………………………9

5.0 Installation of Primary Fabric

…………………………………………………………………………………………..18

6.0 Finishing the Seal

………………………………………………………………………………………….29

METALLIC SCISSOR SHOE PRIMARY SEAL

INSTALLATION GUIDE 1.0 GENERAL REQUIREMENTS

1.1 Required Tools and Equipment

A tool and equipment list follows the text. The tool list represents only the minimum requirement. Ensure that all tools on the list are readily available.

1.2 Personal Safety Equipment (minimum)

Hard hat (ANSI Z-89.1) Safety glasses (ANSI Z-87) Work gloves Work shoes Face shield for chip removal processes (ANSI Z-89.1) Hearing protection

2.0 UNLOAD MATERIALS

2.1 Perform an inventory of the following major items:

Number of:

-Wooden shipping crates -Shoes

If possible, place wooden crates and shoe pallet onto floating roof.

NOTE: Ensure all major items listed on the Bill of Lading have been delivered. List any shortages or damaged material on all drayage documents.

2.2 Staging the Materials

Stage materials in a way that minimizes handling.

2.2.1 Unpack shoes and distribute around the perimeter of the roof.

If winds permit, stand the shoes between the rim plates and the foam dams or against the tank shell so they are leaning against the shell plates.

2.2.2 Unpack the scissor hanger assemblies and distribute around

the perimeter of the roof. There are three scissor hangers per shoe. Refer to Figure 1 for details.

2.2.3 While unpacking the scissor hanger assemblies, ensure the

clevis pin that attaches the scissor mechanism to the rim clip is installed through the middle hole in the rim clip.

FIGURE 1

2.2.4 Distribute shoe clips, pusher bars, and pusher plates around

the perimeter of the roof.

2.2.5 Place the remaining seal parts at a location convenient to the work area of the roof.

3.0 PREPARATION FOR SHOE INSTALLATION

3.1 Determine the Type of Rim Extension

3.1.1 The type of rim extension will slightly alter the seal installation method when the primary seal fabric is attached to the rim.

3.1.2 Rim Extension Configurations

1. Vertical Rim. 2. Horizontal Rim.

FIGURE 2

3.2 Apply Neosponge Tape to Shoes

3.2.1 Use a continuous strip of neosponge tape to cover the entire

length of bolt holes used for fabric hold-downs (holes along

the top of the shoe). The neosponge tape is applied to the inside of the shoe. See Figure 3 for shoe orientation.

3.2.2 Use a small piece of neosponge tape (approx. 5”) to cover the

two bolt holes used to mount each shoe clip.

3.3 Preparing the Rim and Shoe Clips (See Figure 3)

3.3.1 Attach the pusher bars (P.M. No. 5) in Figure 3 to the scissor hanger assembly. Notice that the hole in the pusher bar is off-centered. During assembly, ensure that the bottom of the pusher bar extends below the rim clip (P.M. No. 7).

3.3.2 Using one 3/8” x 1” carriage bolt/washer/nut, attach the

pusher bar to the front of the rim clip in the notched area. Tighten securely.

FIGURE 3

3.3.3 At the pre-punched and dimpled holes on the shoe, use 3/8” x 1” bolts/washers/nuts to attach the shoe clips (P.M. No. 6) to

the shoes. Each shoe will receive three shoe clips. Tighten securely.

3.3.4 Using a 5” clevis pin, two 3/8” flat washers, and 1/8” hairpin,

attach the scissor hanger/pusher bar assembly to the shoe clip. Assembly is accomplished by aligning the upper holes in the scissor hanger channel with the holes in the shoe clip and securing with the clevis pin.

3.3.5 Install the hairpin to prevent the clevis pin from backing out.

3.3.6 Repeat the steps above until all three hanger assemblies are

attached to the shoe.

3.3.7 Attach all hanger assemblies to all shoes. PROCEDURAL NOTE…………………………………………………………….. DURING IN-SERVICE INSTALLATIONS, EXTRA PRECAUTIONS ARE REQUIRED TO ENSURE THAT NO SEAL COMPONENTS ARE DROPPED INTO THE PRODUCT.

3.3.8 The shoes are now ready for installation. 4.0 SHOE INSTALLATION PROCEDURAL NOTE…………………………………………………………….. IF A FLAT BAR ANTI-ROTATION DEVICE IS ATTACHED TO THE TANK SHELL, A GUIDE SHOE WILL BE REQUIRED FOR PROPER INSTALLATION. THE GUIDE SHOE SHOULD BE THE FIRST SHOE INSTALLED. IF A GUIDE SHOE IS NOT REQUIRED, PROCEED TO SECTION 4.2.

4.1 Guide Shoe Installation

4.1.1 The complete guide shoe consists of the guide shoe assembly plus a special right hand and left hand shoe that will be bolted to the guide shoe assembly. 4.1.2 Preparing the Guide Shoes

4.1.2.1 Using 3/8” x 1” bolts/washers/nuts, attach

shoe clips to the three places on both the right-hand and left-hand shoe and the two places on the guide shoe assembly.

4.1.2.2 Assemble six scissor hanger/pusher bar

assemblies as described above for use on the left-hand and right-hand guide shoes. Tighten securely. Do not attach the hanger/pusher bar assemblies to the shoes at this point.

4.1.2.3 Two hanger assemblies without pusher bars

are used to hang the guide shoe assembly. These hanger assemblies will be attached later.

4.1.2.4 Install a 3/8” x 2” bolt/nut to mount a shoe

hold-down channel to the center hole of both the left and right-hand guide shoe to allow the attachment of a block and tackle.

4.1.3 Guide Shoe Assembly

4.1.3.1 Stand the guide shoe assembly directly in

front of the flat bar anti-rotation device so that the channel formed in the guide shoe will fit over the flat-bar attached to the tank.

4.1.3.2 Using #10 x 1” bolts/nuts, attach the right and

left-hand guide shoes to the guide shoe assembly. Tighten securely. See Figure 4.

SAFETY NOTE…………………………………………………………………… THE COMPLETED GUIDE SHOE ASSEMBLY IS LARGE, VERY HEAVY, AND AWKWARD TO HANDLE. A BLOCK AND TACKLE OR OTHER APPROPRIATE LIFTING DEVICE SHOULD BE USED TO MANEUVER AND LOWER THE GUIDE SHOE INTO THE RIM SPACE.

FIGURE 4

4.1.4 Positioning the Guide Shoe

4.1.4.1 Using a block and tackle, position the guide shoe assembly into the rim space. Lower the guide shoe until the top of the shoe is 4” - 6” above the rim extension. Tie-off the block and tackle to hold the guide shoe in place.

4.1.4.2 To the shoe clips installed earlier, attach three

hanger/pusher bar assemblies using five inch clevis pins on both the right-hand and left-hand guide shoe. Assembly is accomplished by aligning the upper holes in the scissor hanger channel with the holes in the shoe clip and securing with the clevis pin.

PROCEDURAL NOTE………………………………………………………….. THE PUSHER BARS WILL HAVE TO BE SPREAD AND HELD APART TO ALLOW THE HANGER ASSEMBLY TO ENTER THE RIM SPACE.

4.1.4.3 Using a 5” clevis pin, two 3/8” flat washers, and 1/8” hairpins, attach the scissor hanger/pusher bar assemblies to the shoe clips.

4.1.4.4 Install the hairpin to prevent the clevis pin

from backing out.

4.1.4.5 Repeat the steps above until all six hanger/pusher bar assemblies are attached to the right-hand and left-hand guide shoes.

4.1.4.6 Attach the two hanger assemblies without

pusher bars to the guide shoe assembly at the points next to the channel.

4.1.4.7 Using the block and tackle, raise or lower the

entire guide shoe until the top of the rim clips are even with the top of the rim extension. See Figure 5.

4.1.4.8 Using 11R Vise Grips, securely clamp the rim

clips to the rim extension. (For a horizontal rim, use 11R “C” clamp vise grips.) See Figure 5.

FIGURE 5

4.1.5 Attaching the Guide Shoe to the Roof

4.1.5.1 Use existing bolt holes in the rim extension where possible. Otherwise, drill or punch a 7/16” hole through the rim extension at each slotted hole in the rim clip. Holes through the rim extension should be placed near the bottom of the slotted hole to allow adjustment.

PROCEDURAL NOTE…………………………………………………………….. USE EXISTING BOLT HOLES IN THE RIM EXTENSION ONLY WHEN THEY EXACTLY MATCH THE SPACING REQUIRED TO MOUNT THE RIM CLIPS. SAFETY NOTE…………………………………………………………………… WHEN DRILLING ON A TANK IN SERVICE, THE DRILL BIT MUST BE WATER COOLED.

4.1.5.2 Bolt the rim clips to the rim extension using 3/8” x 1-1/4” hex tap bolts/washers/nuts.

NOTE: The washer is placed over the slot in

the rim clip. Hand tighten only. See Figure 6.

FIGURE 6

4.1.5.3 Adjust the shoes by raising or lowering the

hanger assemblies until shoe is level and the scissor hanger channel is in contact with the floating roof rim. The weight of the shoes should be equally distributed on each hanger assembly.

4.1.5.4 Should rim clip adjustment be insufficient to level the shoe, further adjustment can be obtained by re-pinning the scissor mechanism to one of the other adjustment holes in the rim clip.

4.1.5.5 Once properly adjusted, securely tighten all

rim clip bolts and nuts.

4.1.5.6 The basic installation of the guide shoe is now complete and the block and tackle may be removed from the guide shoe.

4.1.6 Following the procedure outlined above, start at the left guide

shoe, and working counter-clockwise, begin installing the regular metallic shoes.

4.2 Normal Shoe Installation

4.2.1 Once three scissor hanger/pusher bar assemblies have been

attached to each shoe, the shoe is ready for hanging.

4.2.2 Hanging the Shoes

4.2.2.1 To provide a convenient hand-hold on the shoe, securely clamp vise grips, hooks, or other device to the top corners of the shoe. See Figure 7.

Shoe

Vise Grip

Vise Grip

Make Sure ShoeClips are Fitted

FIGURE 7

4.2.2.2 Two workers lift the shoe over the rim and

begin lowering the shoe into position. 4.2.2.3 A third worker compresses the scissor

hanger/pusher bars to allow the hanger assemblies to enter the rim space.

4.2.2.4 Continue lowering the shoe into the rim space

to a point where the top of the shoe is 4” to 6” above the rim extension and the top of the rim clip is even with the top of the rim extension.

4.2.2.5 Using 11R vise grips, securely clamp each rim

clip to the rim extension. See Figure 5.

4.2.2.6 Remove the vice grips from the corners of the shoe.

4.2.2.7 In the same manner, lower the second shoe

into the rim space. Allow the second shoe to overlap the first shoe by two inches.

4.2.2.8 Using vise grips, clamp the two shoes together

making sure that the top edges are even and level.

4.2.2.9 The number of shoes that can be installed

before bolting the rim clips to the rim is limited only by the number of available vice grips.

PROCEDURAL NOTE…………………………………………………………….. SHOES ARE DESIGNED TO BE LAPPED BY TWO INCHES. AN EXTRA SHOE HAS BEEN PROVIDED AS A “MAKE-UP” SHOE FOR THE AREA COVERED BY THE LAST SHOE INSTALLED. IN THIS AREA, A COMPLETE SHOE WILL NOT FIT PROPERLY. THE “MAKE-UP” SHOE IS FIELD CUT TO FIT INTO THIS AREA.

4.2.3 Attaching the Shoes to the Roof

4.2.3.1 Use existing bolt holes in the rim extension where possible. Otherwise, drill or punch a 7/16” hole through the rim extension at each slotted hole in the rim clip. Holes through the rim extension should be placed near the bottom of the slotted hole to allow adjustment.

PROCEDURAL NOTE…………………………………………………………….. USE EXISTING BOLT HOLES IN THE RIM EXTENSION ONLY WHEN THEY EXACTLY MATCH THE SPACING REQUIRED TO MOUNT THE RIM CLIPS. PROCEDURAL NOTE…………………………………………………………….. DO NOT WELD THE RIM CLIPS TO THE RIM EXTENSION. WELDING THE RIM CLIPS WILL ELIMINATE MUCH OF THE AVAILABLE ADJUSTMENT OF THE CLIP.

4.2.3.2 Bolt the rim clips to the rim extension using 3/8” x 1-1/4” hex tap bolts/washers/nuts.

NOTE: The washer is placed over the slot in the rim clip. Hand tighten only. See Figure 6.

4.2.3.3 The last shoe installed is field cut-to-length.

Carefully measure the space to be filled by the make-up shoe or place the make-up shoe over the space and mark. Before marking the shoe for cutting, be sure to allow the make-up shoe to overlap both adjacent shoes by two inches. Make-up shoes should contain at least two scissor support hangers. Previously installed shoes can be cut to accommodate the make-up shoe.

4.2.3.4 Remove the marked make-up shoe from the

rim space. At the mark, scribe a cut-line completely across the shoe and use an air nibbler to perform the cut. File cut edge smooth.

4.2.3.5 Attach the required shoe clips and

hanger/pusher bar assemblies and place the trimmed shoe into the rim space and secure.

4.2.3.6 Adjust the shoes by raising or lowering the

hanger assemblies until shoe is level and the scissor hanger channel is in contact with the floating roof. The weight of the shoes should be equally distributed on each hanger assembly.

4.2.3.7 Should rim clip adjustment be insufficient to

level the shoe, further adjustment can be obtained by re-pinning the scissor mechanism to one of the other adjustment holes in the rim clip.

4.2.3.8 Once properly adjusted, securely tighten all

rim clip bolts and nuts.

PROCEDURAL NOTE…………………………………………………………….. IF ADJUSTMENT CAUSES THE TOP OF THE RIM CLIP TO RISE ABOVE THE RIM EXTENSION, THE PROTRUDING EDGE SHOULD BE TRIMMED AND FILED SMOOTH OR COVERED AND PADDED WITH NEOSPONGE TAPE TO PREVENT DAMAGE TO THE PRIMARY FABRIC. 5.0 INSTALLATION OF PRIMARY FABRIC

5.1 Determine Which Fabric Material is Being Used.

5.1.1 Most common fabrics used are:

1. VS-10 (Petrolam 10) 10 mil, black both sides. 2. VS-18 (Petrolam 18) 18 mil, black both sides. 3. TB-35 (Urethane) 35 mil, black and tan.

5.1.2 The urethane fabric is installed with the tan side up.

5.1.3 Petrolam fabric can be installed with either side up.

5.2 Roll out the Fabric

5.2.1 Near the rim space and around the circumference of the roof,

sweep clean an area where the primary fabric can be laid out. Be sure the fabric is not laid over any object that may tear or puncture the fabric. Do not walk on top of rolled out fabric.

5.2.2 In the cleaned space, roll out a convenient amount of fabric

(approximately 30 feet or more).

5.3 Attaching the Fabric to the Shoe. See Figure 8 PROCEDURAL NOTE…………………………………………………………….. THE FABRIC MUST BE ATTACHED TO THE SHOE BEFORE IT IS ATTACHED TO THE ROOF RIM.

5.3.1 At approximately four feet from the vertical edge of the first shoe, fit the fabric to the holes in the top of the shoe. This point will become the “start/finish” point for the installation of the primary fabric.

5.3.1.1 The fabric is not punched and it will be necessary to cut a slot in the fabric so it can be attached to the shoe.

5.3.1.2 Using a razor knife, cut a one inch slit at a

position one inch from the top edge of the fabric.

5.3.2 Bolting the Fabric into Place

5.3.2.1 With one hand, pull the top of the shoe away

from the tank shell.

5.3.2.2 With the other hand, from the outside toward the inside, insert a 3/8” x 1” carriage bolt (Item12) through the dimpled fabric hold-down bolt hole and pierce the neosponge tape.

5.3.2.3 At the hole slit earlier, place the fabric over

the bolt.

5.3.2.4 Slide the 7-3/4” shoe hold-down channel (Item 9) over the bolt. Legs of the channel face toward the shoe.

5.3.2.5 Level the fabric with the shoe and tightly

secure the fabric and hold-down channel with a 3/8” washer and nut.

5.3.2.6 Working counter-clockwise, move to the next

fabric hold-down bolt hole and insert another carriage bolt as described above.

5.3.2.7 Pull the fabric tight and slit the fabric over the

bolt. Be sure the slit is one inch from the top edge of the fabric.

5.3.2.8 Tightly secure the fabric to the shoe with the

shoe hold-down channel and 3/8” washer and nut.

5.3.2.9 Continue to attach fabric to the shoe until the

point is reached where two shoes are overlapped.

FIGURE 8

5.3.3 Fabric Overlap

5.3.3.1 At each shoe overlap, a two inch fold must be

put in the fabric to allow for expansion. See Figure 9.

RIGHT & LEFT SPLICEHOLDDOWN CHANNEL

SHOE OVERLAPFOLD FABRIC

SHOE

PRIMARY FABRIC SEAL

3/8” x 1 ¼” CARRIAGE BOLTW/ NUT AND WASHERFINGER TIGHTEN ONLY

2”

FIGURE 9

PROCEDURAL NOTE…………………………………………………………… SPECIAL HOLD-DOWN CHANNELS ARE REQUIRED AT ALL SHOE OVERLAPS. BE SURE TO USE ONLY THE APPROPRIATE LEFT AND RIGHT SPLICE CHANNELS TO SECURE THE FABRIC OVERLAPS. EACH SPLICE CHANNEL HAS ONE SLOTTED HOLE.

5.3.3.2 At the shoe overlap, place a two inch fold in the fabric and secure the fabric to the shoe with a Right Splice Channel mounted to the last hole in the shoe.

5.3.3.3 When attaching the Right Splice Channel to

the shoe, do not over tighten this bolt. Proper bolting will allow the fabric to expand and contract as the shoes move.

5.3.3.4 Insert a bolt through the first bolt hole on the

next shoe and extend the fabric over the bolt.

5.3.3.5 Slit the fabric and attach it to the shoe using the Left Splice Channel. Again, do not over tighten this bolt. Proper bolting will allow the fabric to expand and contract as the shoes move.

5.3.3.6 Once the Right and Left Splice Channels are

secured in place, proceed to the next bolt hole and attach the fabric using the normal 7-3/4” channel.

5.3.3.7 Return to the overlap area. Pull the shoe in

toward the floating roof rim and then release. Ensure the splice channels allow the shoes to “expand” and “contract.” Adjust the tightness of the channel bolts as necessary.

5.3.3.8 Continue around the circumference of the tank

attaching fabric to the top of the shoes. PROCEDURAL NOTE…………………………………………………………….. TO REDUCE FIRE HAZARD AND EXPOSURE TO HYDROCARBON MATERIALS, FOR SEAL WORK ON TANKS IN SERVICE, THE PRIMARY FABRIC IS ATTACHED TO BOTH THE SHOE AND THE RIM AS WORK PROGRESSES AROUND THE TANK.

5.4 Splicing the Fabric

The number of rolls of fabric required to complete the job depends on the type of fabric used and the diameter of the tank. All jobs will require at least one fabric splice at the start/finish point. Where multiple rolls of fabric are involved, the ends of the rolls are spliced together just prior to being attached to the shoe.

5.4.1 When a splice is made, leave enough fabric at the end of the

first roll to allow the fabric to be laid flat on the roof or pontoon deck.

5.4.2 Overlap approximately ten inches of the end of the first roll

with ten inches of the beginning of the second roll.

5.4.3 Splice the fabric using the method appropriate for the type of fabric.

5.4.4 Splicing Procedure for TB-35 Fabric (black and tan)

5.4.4.1 Leave approximately three feet of fabric

unattached to the shoe. Position the fabric so the ends of the two rolls overlap approximately ten inches.

5.4.4.2 Clean the ten inch mating surfaces with the

supplied cleaner.

5.4.4.3 Apply contact glue to both surfaces and press together firmly.

5.4.4.4 Using a roller, press the fabric flat against the

deck and roll out any air trapped in the glued area.

5.4.4.5 Complete the splice by attaching the

mechanical splice bars to both sides of the fabric. See Figure 10.

FIGURE 10

5.4.5 Splicing Procedure for Petrolam Fabric

5.4.5.1 Leave approximately three feet of fabric

unattached to the shoe. Position the fabric so the ends of the two rolls overlap approximately ten inches.

5.4.5.2 Clean the ten inch mating surfaces with a

clean cloth.

5.4.5.3 Apply the etching liquid to a clean cloth and thoroughly wipe the mating surfaces of the fabric. The fabric will change color. Ensure that the entire area to be glued changes color. Repeat process if necessary.

5.4.5.4 Mixing and Applying the Glue

NOTE: The glue used to splice the Petrolam fabric comes in two parts. To ensure a good splice, work quickly.

5.4.5.5 Mix three parts of component B to two parts

of component A. Mix thoroughly and quickly apply a thin layer of glue to one of the mating surfaces.

5.4.5.6 Firmly press the two mating surfaces together.

5.4.5.7 Using a roller, press the fabric flat against the

deck and roll out any air trapped in the glued area.

5.4.5.8 Complete the splice by attaching the

mechanical splice bars to both sides of the fabric. See Figure 10.

5.4.6 Finishing Fabric Attachment to the Shoe

5.4.6.1 Install fabric around the circumference of the

tank until a point approximately three feet from the start/finish is reached.

5.4.6.2 At the start/finish point, it will be necessary to

carefully remove approximately three feet of the fabric that was installed first.

5.4.6.3 If necessary at the end of the roll, cut the

fabric to allow only a ten inch lap at the start/finish point.

5.4.6.4 Following the appropriate method, splice the

ends of fabric.

5.4.6.5 Reattach the spliced and fitted fabric to the shoe. Fabric attachment to the shoes is now complete.

5.5 Attaching the Fabric to the Rim and Installation of Pusher Plates PROCEDURAL NOTE…………………………………………………………….. USE THE FULL WIDTH OF THE FABRIC SUPPLIED. ALLOW EXCESS FABRIC TO DRAPE INTO THE RIM SPACE.

Determine whether the primary mechanical shoe seal is the only seal to be installed, or if a secondary wiper seal will be added.

a. If only a shoe seal is to be installed, a hold-down channel is used

to secure the primary fabric to the rim extension. b. When the shoe seal is installed in conjunction with a secondary

wiper seal, the secondary seal is installed directly over the primary fabric on horizontal rims (an optional flat bar may be used). Two channels are used on vertical rims.

5.5.1 For a vertical rim, apply neosponge tape to the rim space side

of the rim extension. For horizontal rims, the neosponge tape is applied to the top of the rim.

5.5.2 Pusher plates are installed at the same time the primary fabric

is being attached to the rim.

5.5.3 Starting at a shoe overlap, position a pusher plate centrally over the lapped area so that the plate pushes the shoe against the tank shell. The top of the pusher plate is mated flush against the rim and positioned over the rim extension bolt holes.

5.5.4 Positioning the Pusher Plates

5.5.4.1 The pusher plates are installed equally spaced

between the scissor hanger assemblies. Wherever possible, use existing holes in the rim extension.

5.5.4.2 Where necessary, punch or drill a 7/16” hole

through the rim extension to allow mounting. 5.5.4.3 Pusher plates at the shoe overlap must be

centered over the lap.

5.5.4.4 Using 3/8” x 1-1/4” bolts/washer/nuts, attach the pusher plates, primary fabric, and rim

hold-down channel to the rim extension and tighten securely. Because of the difference in circumference between the shoe and the floating roof rim, the excess fabric must be “gathered” as installation proceeds.

5.5.4.5 When a secondary seal is to be installed, a flat

bar is substituted for the rim hold-down channel.

5.5.4.6 Figure 11 shows the positioning detail and

Figure 12 shows the attachment detail of the pusher plates.

“C”

“C”

12

3

4

1

EQUALLY SPACED @ 4’-0”MEASURED ALONG CIRCUMFERENCEOF INSIDE SHELL (TYP.)

RIM HOLDDOWN CHANNEL4PRIMARY FABRIC3PUSHER BAR2PUSHER PLATE1

DESCRIPTIONPARTMARK

FIGURE 11

FIGURE 12

5.5.5 Completing the Installation

5.5.5.1 Work around the circumference of the tank attaching the fabric to the rim.

5.5.5.2 Remember to properly position all pusher plates as required.

6.0 FINISHING THE SEAL

6.1 The installation of the primary mechanical shoe is now complete. Remove any excess shoe seal parts from the roof. The tank is now ready for service or the installation of the secondary wiper seal.

6.2 If a secondary wiper seal is used in conjunction with the shoe seal,

Figure 13 shows the arrangement at the rim.

FIGURE 13

TOOL LIST 2 1/2” drive air impacts (Ingersol Rand Model No. 2705A1) 2 1/2” drive air drills (Ingersol Rand Model No. 728NA3) 1 Air nibbler (Chicago Pneumatic 835) 1 90o right angle drill (Ingersol Rand Model No. 7LM3A43) 2 25” tape measures 2 9/16” combination wrenches 1 185 CFM air compressor (diesel) - 3/4” air hose (number of feet according to tank size) - 1/2” air hose (number of feet according to tank size) 1 1/2” drive ratchet - Drill bits 2 9” channel lock pliers 2 10R vise grips 12 11R vise grips 6 9R vice grips 6 8R vise grips 2 12” adjustable wrenches 1 Straight tin snips 2 Utility knives 2 Flat screw drivers 2 Phillips screw drivers 2 4# hammers 1 8# hammers 1 36” bolt cutters - Miscellaneous 1/2” deep sockets 1 Hacksaw with extra blades 1 Come-a-long 1 3-way manifold (with quick connects) 1 Caulking gun 2 Flat metallic hand file Tank size, crew size, and common sense will determine some quantities.