Iranian Classification Society Rules

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Section 3 Transverse Hold Frames


301. Scantlings


1. The section modules of transverse hold frames provided below the freeboard deck between the col- lision bulkhead and the after peak bulkhead, is not to be less than obtained from the formula in Table 9.1, but in no case is it to be less than 30 cm3.


2. Where the depth of bottom centre girder is less than ÆÕÌĴ, the

Par 1 are to be suitably increased.


scantlings of frames as specified in


302. Connection

Transverse hold frames are to be overlapped with frame end brackets by at least 1.5 times the

image


depth of frame sections and are to be effectively connected there to.


Table 9.1 Section modulus


Location

Section modulus (cm3)

(1) Between 0.15Ã from the fore end and the after peak bulkhead

Ě Ņ ĪǾĴ ĊᾜᾨĪ

(2) Between 0.15Ã from the fore end and the collision bulkhead

Ě Ņ ĮǾĨ ĊᾜᾨĪ

Ċ = Frame spacing (m)

ᾨ = Vertical distance from the top of inner bottom plating or single bottom floors at side to the top of deck beams above the frames (m)

ᾜ = Vertical distance from the lower end of l at the place of measurement to a point as specified in the following (m)

30 m P Ã ≤ 90 m : ᾘ Ñ LǾLĨĨ Ã Ň LǾJĨ (above top of keel)

90 m P Ã : ᾘ Ñ LǾLĮK Ã (above top of keel)