Model # 50051

Internet #203677949

Store SKU #413057

Store SO SKU #1000073459

Peak Aluminum Railing 4 in. x 4 in. x 42 in. Black Aluminum Stair Post

Peak Aluminum Railing

4 in. x 4 in. x 42 in. Black Aluminum Stair Post

  • DIY friendly and easy to install
  • Attractive and durable powder coat finish
  • Die cast base support design provides additional support
$3992 /each

Choose Your Options

  • Black
  • White

Frequently Bought Together

Product Overview

A strong railing design begins with the post support - a key area in providing a safe and stable railing system. Our Aluminum Stair Post is firmly anchored to deck surfaces with a sturdy, attractive 4 x 4 base support. Unlike flat base plates, the die cast base of our end post provides a complete four-sided support to the 2 x 2 post and overall stability to your railing system. The Aluminum Stair Post is a fundamental part of the Peak Aluminum Railing - an attractive, durable and low-maintenance railing system. While other railings may warp, rot or decay, Peak Aluminum Railing stays strong for years thanks to its superior protection and lasting beauty.

California residents: see   Proposition 65 information

  • Easy to install
  • Attractive and durable powder coat finish
  • Die cast base support design provides additional support
  • Use with 6 ft. stair hand and base rail with connectors
  • Includes 1 x 42" end post with fasteners
  • Complete your project


Info & Guides

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Customer Questions & Answers

Can your post be shortened . 4"X4" Being the post width. What is the base width? and haw many att...

Can your post be shortened . 4"X4" Being the post width. What is the base width? and haw many attachment points does it have to my deck?
Asked by: Rusty
Hi Rusty, thank you for your question. Our stair post has a removable die cast cap that allows this post to be cut down if necessary. The post column is actually 2" x 2", and the post base is 4" x 4". Each post has 4 connection points at the base. Please let us know if we can be of further assistance. Thank you!
Answered by: Product Expert
Date published: 2017-03-22

can these railing posts be installed on cement stairs?

Asked by: vwchic
Hello, and thank you for your question. Yes, the Peak Aluminum Railing posts can be installed on concrete or cement. A fastener specifically designed for concrete will need to be used. The fasteners that ship with the Peak Aluminum Railing posts are designed for connection to a wooden substrate.
Answered by: Product Expert
Date published: 2017-05-24

Are pickets required structurally on spans of 3' or less for deck or stair sections?

Asked by: Luke
Hi Luke, Thank you for your question. Pickets are required as part of the stair infill sections on the Peak Aluminum Railing. Please give us a call toll free at (877) 883-7325 if you have any additional questions at all.
Answered by: Product Expert
Date published: 2016-09-01

Do these posts come in 48 in height?

Asked by: Rob
Hi Rob. Our posts only come in the standard 42" height.
Answered by: Product Expert
Date published: 2016-04-06
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Customer Reviews

4 in. x 4 in. x 42 in. Black Aluminum Stair Post is rated 4.5 out of 5 by 12.
Rated 5 out of 5 by from 42 " stare post It 's a great product already recommended to other friends
Date published: 2017-06-07
Rated 4 out of 5 by from Stair Railings After completing part of my two area railing project I am very happy with the way they look and that they seem to be solid as a rock. That having been said, I will say that making railings less than conventional full length was very difficult determining all the cuts that I had to make. I had bought 6' railing system pieces and my idea is to use it in two different locations @ my home. The first one ended up as a 22" railing & the second is yet to be determined. It also tells you that you can make the cuts with a hacksaw and that is as far from the truth as possible. I ended up buying a special aluminum cutting blade for my compound miter saw and that made the project 1000% better. In spite of the difficulty I had in the installation we( my wife & I) are very happy with the product we chose. I believe it is very good quality and look forward to having my total project completed.
Date published: 2016-09-05
Rated 5 out of 5 by from My Dream Patio My husband and myself finally completed the construction of our new family home over the holidays and being that spring is nearly upon us, I was very eager to outfit my patio to become my dream outdoor living space! I had finalized all but the railing enclosure, so I took to the internet. After many hours searching, comparing, and deliberating, I came to the conclusion that the Peak Aluminum Railing System was the one for me and my patio. And I couldn't have been more correct! The team at the Peak HQ patiently guided me through the process of laying out my patio and provided me with all information needed in order to have my railing to my preference, as there are numerous components that allowed me to add my personal touch! They were with my from start to finish - and even requested that I provide a photo of the finished product out of sheer interest. I am very happy with this company and the product that they manufacture. I will keep an eye out for the Peak logo whenever I embark on future home improvement products.
Date published: 2015-02-26
Rated 4 out of 5 by from Good for house step railing This product worked out well as a railing at front steps. It is intended for deck steps, but I anchored it with expanding concrete anchors. The description 4 x4" is misleading. That is dimension of base.
Date published: 2016-09-19
Rated 5 out of 5 by from I love this product !!!! Looks great ! I get tons of complements my deck now . I used the white rails and smoked glass inserts . Watch the install video on there web page as it is better to see it installed then just pictures .
Date published: 2016-10-03
Rated 4 out of 5 by from Sturdy post Used to place stair rail on concrete porch used tapcons to attach.
Date published: 2016-10-20
Rated 5 out of 5 by from Great Product I decided to install the Peak Aluminum railing for a couple of reasons. 1. In the Pacific Northwest it won’t rust or rot as fast as wood or metal. 2. This system is modular, so replacing individual pickets is easier than replacing an entire section of fixed railing. Components I used in the installation include the 4 foot rails, 6 foot rails, 6 foot stair rails, 6 foot stair pickets, 6 foot standard pickets, Stair Posts, End Posts, Corner Posts, Mid Posts, Wall Brackets, Stair Brackets, Universal Brackets, Walk Through Gate, and Decorative Spacers. Installation was fast and easy for the most part. I started at a corner, and worked my around the deck. On the runs that attached to a wall, I used a Mid or End Post to mark the location of the wall Mount Brackets. Where I had a short section, I placed it near the wall, or near a gate to give the gate a little more stability. I installed a couple of 6 foot rails on one run, and decided to redo it with 4 foot rails. Most of the runs were such that 4 foot rails were easier, and I replaced the 6 foot rails for uniformity. Stair Posts, End Posts, Mid Posts, and Corner Posts were easy to work with, and the feel secure when installed. Stairs are a little tricky and difficult. Installing a 3 foot section of stair railing takes as long as installing 30-40 feet of standard railing. The stair raining will take about an hour and a half each rail. There are no instructions giving you advice on how to measure or cut the railing. I used scrap pieces of Bottom Railing as spacers, and everything worked out with a 42 inch measurement from the stair to the top of the Stair Rail. It will take a bit to measure and cut the spacers for the stair railing. Don’t get frustrated if it takes a couple of times to get the first one right. After that the rest of the stair rails are easier. They will all take about an hour and a half. Follow the directions for the Walk Through Gate. I used scrap top rail pieces to rest the gate on when installing it, and that provided enough lift to get the top rail of the gate to match the top rail of the fence rail.
Date published: 2016-08-10
Rated 4 out of 5 by from Good quality product The stair railings were difficult to put together, but they look nice and the aluminum is good quality. We bought extra stair posts because our deck has a slope (it is gradual, but amounts to a 4" difference in height over the length of the deck). We used the stair posts and universal connectors to stair-step the railing panels and take care of the slope. It worked, our installer said it was a bit of a pain, but he they did a great job. I imagine a sloped railing would be a bit of a pain for most products. It looks good and we are happy with it overall, and glad we could use the railing we wanted with a few tweaks.
Date published: 2015-12-29
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