> For the complete documentation index, see [llms.txt](https://docs.wcproducts.com/welcome/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wcproducts.com/welcome/shop-accessories/super-pit/assembly-instructions/single-upper-kit/steps-1-4.md).

# Steps 1-4

{% hint style="info" %}
The following assembly steps show two #10-32 bolts being used to mount the Tube Plugs. Additional bolts can be added and found [here](https://wcproducts.com/products/bolts).
{% endhint %}

## Step 1

Install a 1" x 1" Tube Plug into each end of the Horizontal Support Rails, secure them with #10-32 x 3/8"L bolts as shown below.

{% hint style="success" %}
The Tube Plug may require light force to install. In such cases, a dead blow hammer or soft mallet can be used to gently seat the assembly into the tube.
{% endhint %}

<figure><img src="/files/SJWgMYUpJo6E6ul0caUi" alt=""><figcaption></figcaption></figure>

## Step 2

Install a 1" x 1" Tube Plug into each end of the Vertical Rails, secure them with #10-32 x 3/8"L bolts as shown below.

{% hint style="info" %}
Only the Vertical Rails without pre-installed Rivet Nuts will have Tube Plugs at each end.
{% endhint %}

{% hint style="success" %}
The Tube Plug may require light force to install. In such cases, a dead blow hammer or soft mallet can be used to gently seat the assembly into the tube.
{% endhint %}

<figure><img src="/files/Zy8MnTLSlDUOC2SIXWWw" alt=""><figcaption></figcaption></figure>

## Step 3

Install a 1" x 1" Tube Plug into the end of the remaining Vertical Rails, secure them with #10-32 x 3/8"L bolts as shown below.

{% hint style="info" %}
Only the Vertical Rails **with** the pre-installed Rivet Nuts will have a Tube Plug on one end.
{% endhint %}

{% hint style="success" %}
The Tube Plug may require light force to install. In such cases, a dead blow hammer or soft mallet can be used to gently seat the assembly into the tube.
{% endhint %}

<figure><img src="/files/ldRnGF6Rpk1uvUyfuFLF" alt=""><figcaption></figcaption></figure>

## Step 4

Combine the Vertical Rails from Steps 2 & 3 using the Horizontal Support Rail From Step 1, then secure them with #10-32 x 3/8"L bolts as shown below.

{% hint style="info" %}
Repeat this for all of the Vertical Rails.
{% endhint %}

<figure><img src="/files/GVHiYuCnuePMsoGXji9z" alt=""><figcaption></figcaption></figure>


---

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