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B98 Bookcase plinth

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B98 Bookcase plinth

A finished stack starts at the floor — the mid-depth plinth grounds wide B98 cases in Mogens Koch’s 1944 book-box system.

Solid oak and nature lacquered like the cases above it, this plinth from FDB Møbler measures 21.3 inches wide by 9.4 deep by 3.9 high. It belongs under the bottom case of a floor-standing stack, matched to wide B98 boxes of similar depth.

Materials

Solid oak, nature lacquered

Dimensions

21.3 in W x 9.4 in D x 3.9 in H; 6.6 lbs

Designer

Mogens Koch, 1944

Fits

B98 bookcases — match width and depth

Common Questions

How do I pick between the 6.7, 9.4, and 11-inch plinths?
Match depth — measure your B98 case and choose the plinth depth closest to it. This 9.4-inch version suits the mid-depth wide cases in the range.

Can one plinth support a tall stack?
The plinth is the system’s intended base for floor stacks; keep heavier, larger cases lowest and the stack stable. Each B98 shelf itself is tested to 44 lbs.

FDB Møbler +

FDB Møbler has shaped Danish design since 1942, when Børge Mogensen set out to create furniture both beautiful and accessible. Rooted in the cooperative movement, every piece reflects honest materials, timeless forms, and uncompromising craftsmanship. Part of Rosendahl Design Group, FDB Møbler holds Nordic Swan Ecolabel and FSC certifications. Responsibly sourced wood, OEKO-TEX textiles, and designs built to last for generations.

Shipping & Returns +

In Stock Items Ship Within 1-4 Business Days * Free Shipping On Orders Over $100 * 60-Day Return Policy * We will contact you to confirm any extended lead times for out of stock or backorder items * Business days are Monday to Friday, excluding Federal Holidays

Country of Production +

Lithuania

Dimensions +

Overall height: 3.9"
Depth overall: 9.4"
Overall width: 21.3"
Weight: 6.6 lbs

Care Guide +

FDB Møbler furniture is crafted from FSC-certified wood, powder-coated steel, and OEKO-TEX textiles. Keep away from direct heat and sunlight. Dust with a soft cloth; clean with a damp cloth and mild soap. For lacquered surfaces, avoid harsh chemicals. For oiled wood, re-oil periodically. For upholstery, vacuum regularly and address spills promptly. Lift furniture rather than dragging across floors.

FDB Møbler

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Shipping Info

Flat-rate shipping from $10 by order total — your exact rate is shown above, next to the price. Orders over $1,500 ship FREE, freight and duties included. White Glove delivery from $150.

Returns

30-day returns in unused, original condition. Start a return at hello@comosum.co — we'll coordinate it with you.

Warranty

Every piece carries its manufacturer's warranty — typically 2 years or longer. We handle all claims for you at hello@comosum.co.

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