{"id":22363,"date":"2026-10-21T04:25:43","date_gmt":"2026-10-21T03:25:43","guid":{"rendered":"https:\/\/www.fhbrundle.co.uk\/lp\/?page_id=22363"},"modified":"2026-10-28T12:23:53","modified_gmt":"2026-10-28T12:23:53","slug":"staircase-spindles-and-accessories","status":"publish","type":"page","link":"https:\/\/www.fhbrundle.co.uk\/lp\/product-range-overviews\/staircase-spindles-and-accessories\/","title":{"rendered":"Staircase Spindles and Accessories [F.H.Brundle]"},"content":{"rendered":"

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Why choose Staircase Spindles and Accessories?<\/h1>\n<\/div><\/div><\/div><\/div><\/div>

Staircase Spindles: Secure, Stylish, and Compliant<\/h2>\n<\/div>

Whether you are a homeowner seeking to enhance\/renovate a traditional home, fitting out a contemporary new build, or upgrading a commercial space, our staircase spindles\/baluster collection offers the perfect solution. Every component has been carefully engineered to work seamlessly together, giving you the flexibility to mix and match styles, finishes, and profiles to create a staircase that is truly your own.<\/p>\n

Wrought iron spindles are produced in a range of profiles to suit everything from period restoration work to contemporary residential staircases. The style you choose affects not just appearance but also how the spindle is fixed, what bracket type it requires, and whether it can be cut to length on site.<\/p>\n<\/div>

View the range <\/span><\/a><\/div><\/div><\/div>
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Consistent Quality for Fabrication<\/h3>\n

All spindles are produced to consistent dimensional tolerances, which matters when cutting to length on site or welding into a fabricated balustrade frame.<\/p>\n

As a result, inconsistent bar dimensions create alignment problems that add time to every installation. F.H.Brundle’s<\/a> 12mm square hollow section spindles are supplied to a standard that cleanly sit true in their bracket systems without adjustment.<\/p>\n

What Trade Buyers Need to Know<\/strong><\/p>\n

Wrought iron staircase spindles<\/a> are the vertical infill bars that form the balustrade between a handrail and a base rail or stair string. In trade contexts they are also called balusters, though spindle is the term most commonly used in UK. They serve two purposes: structural safety (preventing falls) and visual character (defining the aesthetic of the entire staircase).<\/p>\n

For fabricators, joiners, and staircase installers, getting the specification right matters before a single component is ordered. Furthermore, the wrong spindle profile, the wrong bracket type, or an incorrect spacing calculation can mean a failed building inspection and a costly return visit.<\/p>\n

F.H.Brundle<\/a> stocks one of the UK’s largest ranges of wrought iron staircase spindles and accessories<\/a>, held in stock across nationwide branches and available for same-day dispatch or click-and-collect. This guide covers the complete product range, UK compliance requirements, and how to calculate quantities accurately for any project.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

What are the choices when it comes to our staircase spindles\/baluster bars?<\/h3>\n<\/div><\/div><\/div><\/div><\/div>

F.H.Brundle’s matt black Wrought Iron Staircase Spindles<\/a> are produced in a range of profiles to suit everything from period restoration work to contemporary residential staircases. The style you choose affects not just appearance but also how the spindle is fixed, what bracket type it requires, and whether it can be cut to length on site.<\/p>\n

Plain Bar Spindles<\/a><\/h4>\n

The simplest profile: a straight square hollow bar with no decorative feature. Plain bar spindles are the default choice for industrial, commercial, and utilitarian applications. Welding cleanly and accepting any bracket system, they are easily cut to length on site. F.H.Brundle supplies these in 12mm square hollow section.<\/p>\n

Twist Spindles<\/a><\/h4>\n

A single or double twist along the length of the bar is the most widely used decorative profile in residential metalwork. Twist adds visual interest without significantly increasing installation complexity and are\u00a0fixed using the same bracket system as plain bars.<\/p>\n

Bush Bar Spindles: Round and Square<\/a><\/h4>\n

\u2022\u00a0 Bush bar<\/strong> spindles are a distinctive decorative profile featuring a series of formed bulges or nodes along the length of the bar, giving a segmented, tactile appearance that sits between the simplicity of plain bar and the complexity of basket or scroll designs. F.H.Brundle supplies bush bar spindles in two profiles, both at 12mm:<\/p>\n

\u2022\u00a0 Round bush bar<\/strong> – cylindrical nodes along a round bar, producing a softer, more organic silhouette. Works well in both period and transitional interiors where a decorative detail is wanted without the formality of a twist or basket profile.<\/p>\n

\u2022\u00a0 Square bush bar<\/strong> – the same node formation on a square bar, giving a crisper, more geometric result. A strong choice for contemporary staircases where the angular profile of the bar is part of the design intent.<\/p>\n

Basket Spindles<\/a><\/h4>\n

Basket spindles<\/strong> feature a formed decorative section at the centre of the bar, typically a cage or basket shape produced by forge-pressing. A traditional choice for period properties, Victorian and Edwardian restoration projects, and bespoke gate and railing work, the range spans from a simple single basket to more elaborate double-basket and scroll-basket combinations.<\/p>\n

Panel Infills: Circle, Rectangular, and Square<\/a><\/h4>\n

Panel infills are a distinct alternative to individual bar spindles, offering a bolder visual statement and faster installation on longer balustrade runs. Rather than fixing spindles one by one, a fabricated panel drops into the balustrade frame as a single unit. F.H.Brundle supplies three panel infill types:<\/p>\n

\u2022\u00a0 Circle infill panels<\/strong> – repeating circular apertures within a rectangular frame, a classic wrought iron motif suited to period and heritage installations<\/p>\n

\u2022\u00a0 Rectangular infill panels<\/strong> – clean horizontal or vertical bar grids within a frame, works equally well in traditional and contemporary settings<\/p>\n

\u2022\u00a0 Square infill panels<\/strong> – grid pattern with equal apertures, a versatile choice for both residential staircases and commercial balustrade runs<\/p>\n

\u2022\u00a0 Rectangular Radiussed Edged panel units<\/strong> – similar to the round edged variant but with a more pronounced radius on all four corners, giving a refined, furniture-grade finish suited to high-end residential staircases<\/p>\n

\u2022\u00a0 Rectangular Round Edged panel units (Open One End)<\/strong> – the same round-edged profile but open at one end, allowing the panel to slide into a closed channel or be fitted against a newel post without a visible cut edge<\/p>\n

\u2022\u00a0 Rectangular Round Edged panel units<\/strong> – a rectangular grid panel with rounded outer edges, softening the profile for transitional interiors where a sharper frame edge would look too industrial<\/p>\n

Baluster bards with panel units are particularly effective where a consistent, repeating pattern is needed across a long flight or landing. They also reduce the number of individual bracket fixings required, which can cut installation time on larger projects. As with individual spindles, panel infills must meet the 99mm sphere rule; the aperture size must be specified accordingly.<\/p>\n<\/div>

Decorative Newel Starter Post<\/h3>\n

The newel starter post is the structural anchor at the base of a balustrade run, providing the fixed point from which the handrail and spindle infill span. F.H. Brundle supplies a decorative newel starter post<\/a> (SKU: 05QY303) in hollow 30mm diameter round steel, 1118mm long, finished in matt black powder coat.<\/p>\n

Key specifications:<\/strong><\/p>\n

\u2022\u00a0 Profile:<\/strong> 30mm round hollow section<\/p>\n

\u2022\u00a0 Length:<\/strong> 1118mm (suits standard balustrade heights)<\/p>\n

\u2022\u00a0 Design:<\/strong> Decorative bush detail along the bar, matching the bush bar spindle aesthetic<\/p>\n

\u2022\u00a0 Finish:<\/strong> Matt black powder coat<\/p>\n

\u2022\u00a0 Base plate:<\/strong> Not included; specify separately to suit the substrate<\/p>\n

Two dedicated accessories complete the installation:<\/p>\n

\u2022\u00a0 Bottom cover<\/strong> (05QY303BC) – a matt black cover that conceals the base fixing point, giving a clean finish at floor or step level<\/p>\n

\u2022\u00a0 Top bracket<\/strong> (05QY303TB) – a matt black bracket that connects the post to the underside of the handrail<\/p>\n

The decorative bush detail on the post ties visually to the single and double square bush bar spindles in the same range, making it the natural choice when specifying a coordinated balustrade system. Because the base plate is not included, confirm the substrate fixing method before ordering: surface-mounted base plates, core-drilled sockets, and weld-on plates are the three most common approaches for steel newel posts on timber, concrete, and steel stair structures respectively.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

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Plain Bar<\/strong><\/p>\n<\/div><\/div><\/div>

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Twist Bar<\/strong><\/p>\n<\/div><\/div><\/div>

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Single\/Double Round Bush Bar<\/strong><\/p>\n<\/div><\/div><\/div>

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Single\/Double Square Bush Bar<\/strong><\/p>\n<\/div><\/div><\/div>

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Twist & Single\/Double Basket Bar<\/strong><\/p>\n<\/div><\/div><\/div>

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Single\/Double Rectangular Panel Unit\u00a0<\/strong><\/p>\n<\/div><\/div><\/div>

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Single\/Double Cirlce Panel Unit\u00a0<\/strong><\/p>\n<\/div><\/div><\/div>

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Single\/Double Square Panel Unit\u00a0<\/strong><\/p>\n<\/div><\/div><\/div>

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Rectangular Round Edged Panel Unit\u00a0<\/strong><\/p>\n<\/div><\/div><\/div>

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Rectangular Radiussed Edged Panel Unit\u00a0<\/strong><\/p>\n<\/div><\/div><\/div>

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Rectangular Round Edged Panel Unit Open One End<\/strong><\/p>\n<\/div><\/div><\/div><\/div><\/div>

UK Building Regulations for Staircase Spindles<\/span><\/h3>\n

Any balustrade installed as part of a building in England and Wales must comply with Approved Document K (Protection from Falling, Collision and Impact) under the Building Regulations 2010. Scotland and Northern Ireland have equivalent standards under their own building regulations, but the core requirements for spindle spacing and handrail height are broadly consistent across all UK jurisdictions.<\/p>\n

The 100mm Sphere Rule<\/h3>\n

Single most important compliance requirement:<\/strong> spindles must be spaced so that a 100mm sphere cannot pass between them. In practice, this means the clear gap between adjacent spindles must not exceed 99mm. Rules exists specifically to prevent young children from becoming trapped or falling through the balustrade.<\/p>\n

The 99mm maximum gap applies to both:<\/p>\n

\u2022\u00a0 <\/strong>Raking sections (along the staircase flight)<\/p>\n

\u2022\u00a0 <\/strong>Level sections (on landings and balconies)<\/p>\n

Handrail Height Requirements<\/h3>\n

Approved Document K specifies that handrail height on a staircase should be between 900mm and 1,000mm measured from the pitch line<\/strong> (the notional line connecting the front edge of each stair nosing). On a level landing, the minimum height increases to 1,100mm<\/strong> from the finished floor level.<\/p>\n

Balustrade Strength Requirements<\/h3>\n

Balustrade as a whole must be capable of resisting the loads likely to be imposed on it. Domestic staircases, this means the structure must withstand a horizontal point load of at least 0.36 kN\/m applied at handrail height and for commercial or public buildings, the requirement is higher. Wrought iron spindles, properly welded or bracketed into a rigid handrail and base rail system, typically exceed these requirements comfortable.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

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\n\n\n\n\n\n\n\n
\n

Requirement<\/p>\n<\/th>\n

\n

Domestic Staircase<\/p>\n<\/th>\n

\n

Landing \/ Level Section<\/p>\n<\/th>\n<\/tr>\n<\/thead>\n

Max Spindle Gap<\/span><\/td>\n99mm<\/td>\n99mm<\/td>\n<\/tr>\n
Handrail Height<\/span><\/td>\n\n

900-1,000mm from pitch line<\/p>\n<\/td>\n

\n

Min 1,100mm from FFL (Finished Floor Level)<\/p>\n<\/td>\n<\/tr>\n

Balustrade load (domestic)<\/td>\n\n

0.36 kN\/m horizontal<\/p>\n<\/td>\n

\n

0.36 kN\/m horizontal<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div><\/div><\/div><\/div>

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How to buy<\/h2>\n<\/div>

How to Calculate Spindle Quantities<\/h2>\n

Ordering the right quantity of spindles before starting a job avoids delays and unnecessary return deliveries. The calculation is straightforward once you have accurate measurements, but it must be done per section (raking flight and level landing separately) because spindle spacing is measured horizontally on a landing and along the pitch line on a staircase.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

Now you have more insight into the benefits and use cases of our staircase spindles, you’ll need to know how to buy this product.<\/span><\/p>\n

The Basic Formula<\/h3>\n

Work in millimetres throughout. For each section of balustrade:<\/p>\n

\u00a01. Measure the total run<\/strong> (horizontal distance of the balustrade section in mm)<\/p>\n

2. Note your spindle width<\/strong> (F.H. Brundle supplies 12mm square hollow section)<\/p>\n

3. Set your target gap<\/strong> (maximum 99mm; many installers use 90-95mm to allow a margin)<\/p>\n

4. Calculate the pitch<\/strong> (spindle width + gap) = the centre-to-centre spacing<\/p>\n

Example:<\/strong> A landing run of 2,400mm with 12mm square spindles and a 95mm target gap.<\/p>\n

\u2022\u00a0 <\/strong>Pitch = 12 + 95 = 107mm<\/p>\n

\u2022\u00a0 <\/strong>Number of spaces = 2,400 \/ 107 = 22.4 (round down to 22 spaces)<\/p>\n

\u2022\u00a0 <\/strong>Number of spindles = 22 + 1 = 23 spindles<\/strong><\/p>\n

Always order 2-3 extra spindles per section as a contingency. Spindles that arrive uncut can be returned; spindles that have been cut to length cannot.<\/p>\n

Staircase Raking vs Level Landings<\/h3>\n

On a raking staircase flight, the spacing calculation is based on the horizontal projection<\/strong> of the flight, not the sloped length. This is because the 100mm sphere test is applied horizontally. Consequently, if you measure along the rake, you will under-order.<\/p>\n

Quick Reference: Spindles per Metre<\/h3>\n

The table below gives approximate spindle counts per linear metre of balustrade for common spindle widths and a 95mm gap:<\/p>\n

Once measured and plotted out, you will need to consider fixing<\/b> \u2013 we supply variants designed to suit the substrate you’re fixing into, ensuring structural stability whether installed into firm ground, concrete, or via bolt-down options over existing hard surfaces.<\/p>\n

Finally \u2013 you should consider the styling and finish<\/b> of your bow top railing installation. Available options include standard bow top, interlaced bow top, and our RoSPA-approved range, with various heights and finishes such as galvanised steel or durable powder-coated options to suit your exact aesthetic requirements.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

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\n\n\n\n\n\n
\n

Spindle Width<\/p>\n<\/th>\n

\n

Pitch (spindle + 95mm gap)<\/p>\n<\/th>\n

\n

Spindles per metre<\/p>\n<\/th>\n<\/tr>\n<\/thead>\n

\n

12mm square hollow section<\/p>\n<\/td>\n

107mm<\/td>\n\n

~10<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Important:<\/strong> These are approximations. Always calculate from your actual measurements rather than using a per-metre rate as the sole basis for ordering.<\/p>\n<\/div>\n<\/div><\/div><\/div><\/div>

FAQs<\/h3>\n<\/div><\/div><\/div><\/div><\/div>