Support Block, Cedar


Wood Porch Railing Support Block, for use on rail lengths of 6′ and over.

Priming Option *


A Wood Porch Railing Support Block is recommended for rail sections 6 feet long and longer.  They prevent sagging and add strength to your exterior porch railing system.  Designed to be small an relatively unnoticeable.

1 5/8″ square x 4″ long.  Made of clear Western Cedar.  Available pre-primed from our shop.

4″ is the max toe space allowed by code, and these can be cut to your specific toe space (typically between 2″ and 4″).

PRIMING OPTION: Premium oil-based primer in flat white available as an option, which allows for immediate installation.  Expect some blemishes in the primer from shipping.  This is normal and will not affect the finished result when painted after installation.

For CURRENT LEAD TIME and shipping transit time, click here.

SHIPPING COST is displayed in shopping cart.  Enter Quantity and click “ADD TO CART”.

Click Here for Warranty Information

Proudly Made in the USA.

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Download Product Drawings:


Our woodwork is stronger and longer lasting than woodwork produced by others.  Why?  Because we use better materials!

Port Orford Cedar (called White Cedar in some localles) is highly resistant to decay, is stronger and more dense than all other cedars, and machines to a smoother finish. In fact, it is 45% stronger, denser, and harder than all other cedars, redwood, and pine. Also it is a creamy white color which allows for limitless options on staining, and the color will not bleed through paint as sometimes happens with darker woods.  All this means products made from Port Orford Cedar will simply look better in the decades to come.

Grades used: We use both CLEAR and SELECT TIGHT KNOT grades of wood in our products.  When Select Tight Knot is used, only the best pieces are used of that grade.  Because of the nature of our products, we can often “cut around” the knots, so even our STK products often end up clear.


Frequently Asked Questions:

When do I need to use a support block?
We recommend you use a support block for rail sections that are 6′ long or longer.

Does this support block work with all the different rail systems?
Yes.  Use the same support block regardless of which rail system you choose.

How much does shipping cost?
SHIPPING COST is displayed in shopping cart.  Enter Quantity and click “ADD TO CART”.

How long will my order take?
For CURRENT LEAD TIME and shipping transit time, click here.

Still have questions?  Email us at [email protected] or call 888-459-9965 and we’ll be glad to help with your project.


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