# Structure
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The following images show #10-32 Rivnuts installed in the Structure Tubes. The use of Rivnuts is meant to make the repeated removal and install of the Fixed Side Panels hassle-free. However this is completely optional and does not need to be done.
{% endhint %}
## Step 1
Install a 2" x 1" Tube Plug into each end of the of the Vertical Structure Tubes using two #10-32 x 3/8"L bolts as shown below. Additional bolts will be added in later assembly steps.
## Step 2
Install a 1" x 1" Tube Plug into each end of the Horizontal Rails using #10-32 x 3/8"L bolt as shown below. Additional bolts will be added in later assembly steps.
## Step 3
Install and fully capture a 1/2" Rounded He using a Bearing Retention Plate and Roller Center Plates as shown below. Secure the plates using #10-32 bolts.
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Repeat this for the second Vertical Rail.
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## Step 4
Mount the Horizontal Rails from Step 2 onto the Vertical Rail from Step 3 using #10-32 bolts as shown below.
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Repeat this for the other half of the Structure assembly.
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## Step 5
Install T Gussets onto the assembly from Step 4 using #10-32 x 3/8"L Bolts and 3/16" Rivets.
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Repeat this for the other half of the Structure assembly.
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## Step 6
Install the 1.5" x 1.5" Support Tube to the assembly from Step 5 using the Gussets and hardware shown below.
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Repeat this for the other half of the Structure assembly.
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## Step 7
Install the Plastic Hopper Guard onto the Assembly from Step 6 using #10-32 x 1-1/2"L Bolt and Nuts.
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Repeat this for the other half of the Structure assembly.
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## Step 8
Install two 90 Degree Mounting Brackets to the Vertical Structure Tubes from Step 7 using #10-32 x 3/8"L Bolts.
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Repeat this for the other half of the Structure assembly.
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## Step 9
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The image below show the Assembled Stage #1 Bottom Block already installed. For detailed information on this refer back to the Telescope Manual
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Install the Hooks onto the 1" x 1" Hook Tube using the appropriate #10-32 Bolts and Nuts as shown below.
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Repeat this for the other half of the Structure assembly.
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## Step 10
Install the Hook assembly from Step 9 to the Structure assembly from Step 8.
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Repeat this for the other half of the Structure assembly.
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## Step 11
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Repeat this for the other half of the Structure assembly.
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## Step 12
Press a 5/8" ID Tube Connecting Nut into each end of the 3/4" OD Standoffs.
Installing the Tube Connecting Nuts can be done using an Arbor press or a dead blow hammer.
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The 3/4" OD tubes are referred to as **Standoffs**, as they are used to add rigidity to the assembled Hopper.
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