Bulb bars/flats are asymmetrical plate stiffeners used for ship building hull construction (Ship Hull, Ballast Tanks, and Cargo Holds) & Bridges (Box 

b (mm) 5 6 7 8 60 3.41 80 4.41 5.06 5.72 100 6.32 7.13 7.96

4. The bulb stiffener of claim 1, wherein the one or more base flanges includes a pair of base flanges. 5. The bulb stiffener of claim 1, wherein the composite rod is comprised of a majority of fibers aligned in the axial direction. 6. The bulb stiffener of claim 5, wherein the upright web and bulb cap are comprised of +/−45-degree fibers.

Size b. (mm) t. (mm) c. (mm) r. (mm) Section. (cm²) Metric. Weight. (kg/m) Surface. A 60 x 4 60 ±1,5 4 +0,7 / ‑0,3 13 3.5 3.58 2.81 0.146 60 x 5 60 ±1,5 5 +0,7 / ‑0,3 13 3.5 4.18 3.28 0.148 60 x 6 60 ±1,5 6 +0,7 / ‑0,3 13 3.5 4.78 3.75 0.150

This paper describes fatigue tests at stiffener end connections with bulb flats and angle bars and focuses on the question how far bulb flats are also prone to fatigue in view of the reduced

Because of the rounded edges, Bulb Flats are excellent stiffeners with a longer life span compared to angles in terms of corrosion-resistance and maintenance in ship, barge, and bridge construction. We supply bulb flats in a full -wide range of steel types and grades.

with other stiffeners such as flat bars or structural angles. • The compact shape of a bulb flat offers easy access for welding and painting. • The asymmetric bulb flat shape lends itself to simplified collar connection when compared to alternative stiffeners such as 'T's and angles. • The rounded profile of a bulb flat,

An improved composite stiffener and methods and tooling used to form the same. The stiffener includes one or more base flanges, a composite rod extending in an axial direction, a bulb cap surrounding the composite rod, and an upright web extending from the one or more base flanges to the base cap. The upright web includes a non-linear profile in the axial direction providing the improved

Bulb flats are the most cost-effective, efficient and corrosion-resistant solution for plate stiffening. They deliver buckling resistance at a lower weight 

Bulb flats are being used as plate stiffeners especially in the shipbuilding industry. Our supply width ranges from 60mm to 430mm, and can be supplied 

Stiffener End Details - Family No. 11 Panel Stiffener Details - Family No. 12 Summary of Ships Surveyed Revised Classification of Details Sample Calculation: Built-Up Beam Bracket in Way of Bulkhead Stiffener Fabrication Time Versus Size of Members Sample Calculation: Plate Corner Bracket Sample Calculation: Non-Tight Collar 3-13 3-15 3-17 3-18

The use of bulb flat plate stiffeners in ship design is said to reduce building time and maintenance cost. Companies that produce bulb flat plate stiffeners manufacture each stiffener as a single unit, which reportedly results in less production cost compared to welded or fabricated stiffeners.

Bulb flats are the most cost-effective, efficient and corrosion-resistant solution for plate stiffening requirements. Key advantages include an excellent strength to weight ratio delivering buckling

with bulb-flanges can be used instead of other harder-to-produce and assemble sections like Hat- or Tee-stiffeners which have served the industry favorably for decades. Figure 1 illustrates the general cross-section of a bulb-flange as opposed to a regular Tee and I cross-section. Asymmetric bulb-flanges are preferred for the following reasons.

4 Ordinary stiffeners 4.1 Stiffeners not perpendicular to the attached plating Where the angle between the section web and the attached plating is less than 70°, the actual section modulus may be obtained [cm3] from the following formula: w=w 0·sin α w0 = actual section modulus [cm 3] of the stiffener assumed to be perpendicular to the plating

Stiffener End Details - Family No. 11 Panel Stiffener Details - Family No. 12 Summary of Ships Surveyed Revised Classification of Details Sample Calculation: Built-Up Beam Bracket in Way of Bulkhead Stiffener Fabrication Time Versus Size of Members Sample Calculation: Plate Corner Bracket Sample Calculation: Non-Tight Collar 3-13 3-15 3-17 3-18

Bulb flats are tailor made for plate stiffening applications. Their special shape provides significant benefits compared with other types of stiffener.

An improved composite stiffener and methods and tooling used to form the same. The stiffener includes one or more base flanges, a composite rod extending in an axial direction, a bulb cap

An improved composite stiffener and methods and tooling used to form the same. The stiffener includes one or more base flanges, a composite rod extending in an axial direction, a bulb cap surrounding the composite rod, and an upright web extending from the one or more base flanges to the base cap. The upright web includes a non-linear profile in the axial direction providing

An improved composite stiffener and methods and tooling used to form the same. The stiffener includes one or more base flanges, a composite rod extending in an axial direction, a bulb cap surrounding the composite rod, and an upright web extending from the one or more base flanges to the base cap. The upright web includes a non-linear profile in the axial direction providing

An improved composite stiffener and methods and tooling used to form the same. The stiffener includes one or more base flanges, a composite rod extending in an axial direction, a bulb cap surrounding the composite rod, and an upright web extending from the one or more base flanges to the base cap. The upright web includes a non-linear profile in the axial direction providing

Firstly, in terms of plate stiffening, bulb flat bars are a great solution for plate stiffening. Bulb flats provide a low paint area, with no need for edge grinding prior to painting and require fewer lugs compared with alternative plate stiffeners.

Bulb Flat Weight Table - sizes, dimensions and weights for the shipbuilding, barge and construction industries. To order bulb flat, call or email us today. 713-305-9133. Contact Sales.

Firstly, in terms of plate stiffening, bulb flat bars are a great solution for plate stiffening. Bulb flats provide a low paint area, with no need for edge grinding prior to painting and require fewer

2 Buckling Capacity of Plates and Stiffeners. 2.1 Overall stiffened panel capacity. 2.1.1 The elastic stiffened panel limit state is based on the following interaction formula: where cf and Pz are defined in [2.3.4]. 2.2 Plate capacity. 2.2.1 Plate limit state The plate limit state is based on the following interaction formulae:

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