General Penetration Guidelines

DDEESSIIGGNN FFOORR PPRROODDUUCCIIBBIILLIITTYY MMAANNUUAALL

SSEECCTTIIOONN 1199GGEENNEERRAALL PPEENNEETTRRAATTIIOONN GGUUIIDDEELLIINNEESS

9/22/03

THE INFORMATION CONTAINED HEREIN IS THE PROPRIETARY TRADE SECRET OF NATIONAL STEEL AND SHIPBUILDING COMPANY (NASSCO) AND MAY NOT BE DISCLOSED,REPRODUCED, OR TRANSFERRED TO OTHERS FOR ANY PURPOSE EXCEPT AS SPECIFICALLY AUTHORIZED BY THE NASSCO QUALITY PROCEDURE MANUAL OR IN WRITING BY AN

AUTHORIZED OFFICER OF NASSCO. THIS MANUAL IS INTENDED FOR INTERNAL USE ONLY.

RREEVVIISSEEDD PPAAGGEESS

• THE DATE ON EACH PAGE REPRESENTS THE LATEST REVISION.

Total number of pages in Section 19 is 27 consisting of the following:

i...................................9/22/03ii..................................9/22/0319-1.............................9/22/0319-2.............................9/22/0319-3.............................9/22/0319-4.............................9/22/0319-5.............................9/22/0319-6.............................9/22/0319-7.............................9/22/0319-8.............................9/22/0319-9.............................9/22/0319-10...........................9/22/0319-11...........................9/22/0319-12...........................9/22/0319-13...........................9/22/0319-14...........................9/22/0319-15...........................9/22/0319-16...........................9/22/0319-17...........................9/22/0319-18...........................9/22/0319-19...........................9/22/0319-20...........................9/22/0319-21...........................9/22/0319-22...........................9/22/0319-23...........................9/22/0319-24...........................9/22/0319-25...........................9/22/03

DDEESSIIGGNN FFOORR PPRROODDUUCCIIBBIILLIITTYY MMAANNUUAALLSSEECCTTIIOONN 1199

GGEENNEERRAALL PPEENNEETTRRAATTIIOONN GGUUIIDDEELLIINNEESS

9/22/03 i



TTAABBLLEE OOFF CCOONNTTEENNTTSS

19. Introduction................................................................................................................................... 19-1

19.1. General Rules For Penetrations In Hull Structure ..................................................................... 19-1

19.1.1. General ............................................................................................................................ 19-1

19.1.2. Girders, Beams, And Stiffeners................................................................................................. 19-3

19.1.3. Decks And Bulkheads, Structural ............................................................................................. 19-4

19.1.4. Penetration In Strength Envelope–Criteria................................................................................ 19-4

19.1.5. Penetrations In Floors And Longitudinal Girders In Double Bottoms........................................ 19-4

19.1.6. Side Shell Web Frames ............................................................................................................ 19-4

19.1.7. Flat Bar Ring Compensation..................................................................................................... 19-5

LLIISSTT OOFF FFIIGGUURREESS

Figure 1 – Definition of Depth ....................................................................................................................19-2

Figure 2 – 50mm Radius Region Near Shell ................................................................................................19-3

Figure 3 — Girders, Beams, and Stiffeners - Single Row of Small Penetrations in 1/8 Span ..........................19-8

Figure 4— Girders, Beams, and Stiffeners - Large Opening ..........................................................................19-9

Figure 5- Structural Decks and Bulkheads..................................................................................................19-10

Figure 6— Strength Envelope.....................................................................................................................19-11

Figure 7— Double Bottom Floors and Longitudinal Girders ......................................................................19-12

Figure 8— Side Shell Web Frames, Penetration Conditions .......................................................................19-13

Figure 9— Girders, Beams, and Stiffeners - Ring Compensation.................................................................19-14

Figure 10— Girders, Beams, And Stiffeners - Doubler Compensation ........................................................19-15

Figure 11— Girders, Beams, and Stiffeners - Doubler and Ring Compensation..........................................19-16

Figure 12— Penetrations in Way of Weld Seams Preferred Methods .........................................................19-17

Figure 13— Penetrations in Way of Weld Seams Optional Method Due to Space Constraints ...................19-18

Figure 14 – No Penetration Zone at Shear Strake/Stringer Strake ...............................................................19-19

Figure 15-Locations of Penetrations Above/Below Pillars and Stanchions ..................................................19-20

Figure 16 - Restricted Areas for Holes in Longitudinal Structural Bulkheads or Deckhouse Sides...............19-21

Figure 17 – Restricted Areas for Holes Near Major Openings in Decks .....................................................19-22

Figure 18 – Proximity of Sleeved and Lap Ring Penetrations .....................................................................19-23

Figure 19 – Restricted Areas for Holes in Web Frames ..............................................................................19-24

Figure 20 – 25% of Bay Rule.....................................................................................................................19-25



ii 9/22/03



LLIISSTT OOFF TTAABBLLEESS

Table 1- Minimum Face Bar Compensation – Rectangular Openings.........................................................19-5

Table 2- Minimum Face Bar Compensation – Circular Openings...............................................................19-7



9/22/03 19-1

1199.. IINNTTRROODDUUCCTTIIOONN

1. These guidelines are for use on both commercial and Navy contracts.

2. These guidelines are intended to provide the designer with information necessary to determine thefollowing:

Acceptable location and orientation of structural penetrations.

Situations in which compensation for penetration of ship structure is not required.

Situations in which compensation for penetration of ship structure is required.

Situations in which penetration of ship structure is not permitted.

Situations in which hull technical must be consulted.

3. These guidelines also provide information which will enable the designer to determine the type and sizeof compensation required in situations where consultation with hull technical is not required.

4. These guidelines are not applicable to the design of the following:

Large deck openings (hatches, access ).

Archways or door openings.

Clearance cuts allowing structural members to pass through.

Lightening holes.

Weld relief cuts.

Snipes, drainholes, airholes, or clearance holes for erection butts.

Seachest openings.

Scupper openings.

1199..11.. GGEENNEERRAALL RRUULLEESS FFOORR PPEENNEETTRRAATTIIOONNSS IINN HHUULLLL SSTTRRUUCCTTUURREE

1199..11..11.. GGEENNEERRAALL

1. Penetrations are not allowed in the following locations:

a. Sheer strakes and strength deck stringer plates in the midships 3/5 length. (See Figure 14.)

b. Web, girder, beam, or stiffener brackets.

c. Web, girder, beam, stiffener flanges, or backing chocks.

d. Pillars, stanchions or the web of a girder directly above or below a pillar or stanchion. (See Figure15.)



19-2 9/22/03

e. Structural bulkheads directly above or below a pillar or stanchion. (See Figure 15.)

2. Penetrations in structural bulkheads above doors and arches should be avoided. (See Figure 16.)

3. Penetrations in structural decks near the corners of large openings, such as hatches, and in longitudinalbulkheads near the ends of breaks in superstructure or deckhouses should be avoided. (See Figure 17.)Large openings are those that result in break of existing stiffening.

4. Multiple penetrations in main transverse bulkheads should be minimized by employing pipe tunnels orutility trunks.

5. No compensation is required for penetrations through non-structural steel bulkheads or flats, such asdeckhouse decks, deckhouse interior bulkheads, or intermediate platforms.

6. Square cornered penetrations are not allowed. Corners of non-circular penetrations must be wellrounded, a minimum of 1/8 depth of opening, but not less than 25mm will be required (50mm within450mm of side or bottom shell – see Figure 2). Openings less than 150mm in depth will be fullyradiused; i.e., circular or oval, but not rounded rectangles. Depth is as defined in Figure 1.

7. All welding of steel used for compensation must be in accordance with regulatory body requirements andNASSCO welding procedures.

8. Penetration dimensions are based on the clear cut dimensions unless a sleeve or ring is installed, inwhich case the inside dimensions of the sleeve or ring are to be used. (See Figure 18.)

9. For proximity of penetrations to weld seams. (See Figure 12 and Figure 13.)

10. In general, no more than 25% of the structure in a bay should be taken up with penetrations (inaggregate). (See Figure 20.)

LONGITUDINAL DECKS ANDBULKHEADS

STIFFENERS, BEAMS, ANDWEBS

ELSEWHERE

DEPTH DEPTH (SHORTER DISTANCE)

FWD

DEPTH

PERPENDICULARTO ATTACHEDPLATE

FFiigguurree 11 –– DDeeffiinniittiioonn ooff DDeepptthh



9/22/03 19-3

FFiigguurree 22 –– 5500mmmm RRaaddiiuuss RReeggiioonn NNeeaarr SShheellll

1199..11..22.. GGIIRRDDEERRSS,, BBEEAAMMSS,, AANNDD SSTTIIFFFFEENNEERRSS

1. Non-circular openings will be oriented with the longer dimension in the direction of the spanand the shorter dimension in the direction of the depth.

2. If possible the opening should be centered at 1/3 depth of penetrated beam, or, between this point andthe supported plate. Avoid penetrating near the beam flange.

3. Openings are not permitted in way of the end 1/8 span except for small circular holes meeting the criteriaof Figure 3. The span is defined as the unsupported length of the beam and is usually the distancecovered by the beam or girder between supports such as larger girders, stanchions, bulkheads, or decks.For the purposes of this document, brackets are not considered when determining span. Direct anyquestions regarding the definition of beam span to ASD.



19-4 9/22/03

4. The minimum distance from any opening to the supported plating is 75mm if non-compensated or 50mmif compensated with a face bar.

5. Large openings, see Figure 4.

6. Single row of small holes, see Figure 3.

1199..11..33.. DDEECCKKSS AANNDD BBUULLKKHHEEAADDSS,, SSTTRRUUCCTTUURRAALL

1. Structural decks and bulkheads are those which define a watertight compartment or tank boundary orwhich provide support for propulsion or outfit machinery or other primary load bearing ship structure.Bulkheads whose stiffeners are snipped back (not attached) to decks are not constructed to be structuralbulkhead. See Figure 5 and ASD or ID&NA Configuration Control document.

1199..11..44.. PPEENNEETTRRAATTIIOONN IINN SSTTRREENNGGTTHH EENNVVEELLOOPPEE––CCRRIITTEERRIIAA

1. Non-circular openings through strength decks are to be oriented so that the longer dimension runs foreand aft.

2. Openings should be well separated and should not be located on the same line transversely or vertically.

3. Multiple openings will be compensated or combined to form a single opening when the minimum center-to-center distance between the openings is less than the sum of the diameters. See Figure 6 and ASD orID&NA Configuration Control document.

1199..11..55.. PPEENNEETTRRAATTIIOONNSS IINN FFLLOOOORRSS AANNDD LLOONNGGIITTUUDDIINNAALL GGIIRRDDEERRSS IINNDDOOUUBBLLEE BBOOTTTTOOMMSS

This section addresses longitudinal girders outside the midship 3/5 length. Any penetration through alongitudinal girder within the midship 3/5 length will be approved by Penetration Control.

Any openings in floors and longitudinal girders will be centered at or near the mid-depth of the member. SeeFigure 7.

1199..11..66.. SSIIDDEE SSHHEELLLL WWEEBB FFRRAAMMEESS

The penetration of side shell web frames should be kept to a minimum.

When penetrating the frames, the rules of Figure 8 should be applied.



9/22/03 19-5

1199..11..77.. FFLLAATT BBAARR RRIINNGG CCOOMMPPEENNSSAATTIIOONN

1. The following tables specify compensation in the form of flat bar rings. Table 1 specifies compensationfor rectangular openings and Table 2 specifies compensation for circular openings. Pipe sleeves orwelded-in pipes may also be used as compensation in certain instances.

2. In Table 1, “L” is the larger dimension and “W” is the smaller dimension of the non-circular opening.

3. Openings or thicknesses outside the ranges specified in Table 1 and Table 2 shall be approved byPenetration Control on a case-by-case basis.

4. All material used as compensation shall be at least the same grade as the penetrated material.

IInnssttrruuccttiioonnss ffoorr uussee::

1. Determine thickness of plate being penetrated.

2. Determine size of opening.

3. Locate the same or next largest opening in the left-hand column of the table. For rectangular openings,both dimensions (W and L) on the table must equal or exceed the actual values.

4. Move horizontally across the table and locate the column that corresponds with or exceeds the thicknessof the penetrated member. The face bar size indicated is the compensation required for the opening inquestion.

EExxaammppllee::

Penetration in web of beam:

Beam depth = 24 inches.

Penetration width = 7 inches.

Penetration length = 18 inches.

Beam web thickness = ½ inch.

PPrroobblleemm::

Length is 75 percent of the beam depth (over 2/3 beam depth).

Length is greater than twice the opening width.

SSoolluuttiioonn::

From Table 1, the next largest opening listed is 8 x 24. At a thickness of 1/2 inch, the compensationlisted is a 4 x 3/8 face bar. A 4 x 3/8 face bar will increase both the length and depth of the opening bytwice the compensation thickness or 3/4 inch. The opening dimensions then become 7-3/4 x 18-3/4.This still falls below the table value of 8 x 24. Therefore, this compensation is acceptable.

TTaabbllee 11-- MMiinniimmuumm FFaaccee BBaarr CCoommppeennssaattiioonn –– RReeccttaanngguullaarr OOppeenniinnggss

OPENING SIZE(INCHES) W×L

THICKNESS OF PENETRATED PLATE (INCHES) (TP)



19-6 9/22/03

1/4 3/8 1/2 5/8 3/4 7/8 1

3 × 3 2 × 1/4 2 × 1/4 2 × 3/8 2 × 1/2 4 × 5/8 3 × 3/4 4 × 1

3 × 6 2 × 1/4 2 × 1/4 2 × 3/8 2 × 1/2 4 × 5/8 3 × 3/4 4 × 1

3 × 12 2 × 1/4 3 × 1/4 3 × 3/8 3 × 1/2 4 × 5/8 3 × 3/4 4 × 1

4 × 4 2 × 1/4 2 × 1/4 2 × 3/8 2 × 1/2 4 × 5/8 3 × 3/4 4 × 1

4 × 8 2 × 1/4 2 × 1/4 2 × 3/8 2 × 1/2 4 × 5/8 3 × 3/4 4 × 1

4 × 12 2 × 1/4 3 × 1/4 3 × 3/8 3 × 1/2 4 × 5/8 3 × 3/4 4 × 1

6 × 6 2 × 1/4 2 × 1/4 2 × 3/8 2 × 1/2 4 × 5/8 3 × 3/4 4 × 1

6 × 12 2 × 1/4 3 × 1/4 3 × 3/8 3 × 1/2 4 × 5/8 3 × 3/4 4 × 1

6 × 18 3 × 1/4 4 × 1/4 4 × 3/8 4 × 1/2 4 × 5/8 4 × 3/4 4 × 1

8 × 8 2 × 1/4 3 × 1/4 2 × 3/8 3 × 1/2 4 × 5/8 3 × 3/4 4 × 1

8 × 16 3 × 1/4 4 × 1/4 3 × 3/8 4 × 1/2 4 × 5/8 4 × 3/4 4 × 1

8 × 24 3 × 1/4 3 × 3/8 4 × 3/8 4 × 1/2 4 × 5/8 4 × 3/4 4 × 1

10 × 10 2 × 1/4 3 × 1/4 3 × 3/8 3 × 1/2 4 × 5/8 3 × 3/4 4 × 1

10 × 20 3 × 1/4 4 × 1/4 4 × 3/8 4 × 1/2 4 × 5/8 4 × 3/4 4 × 1

10 × 30 4 × 1/4 4 × 3/8 5 × 3/8 5 × 1/2 6 × 5/8 5 × 3/4 5 × 1

12 × 12 2 × 1/4 3 × 1/4 3 × 3/8 3 × 1/2 4 × 5/8 3 × 3/4 4 × 1

12 × 24 3 × 1/4 4 × 3/8 5 × 3/8 4 × 1/2 4 × 5/8 4 × 3/4 4 × 1

12 × 36 4 × 1/4 4 × 3/8 6 × 3/8 5 × 1/2 6 × 5/8 5 × 3/4 5 × 1

16 × 16 3 × 1/4 4 × 1/4 4 × 3/8 4 × 1/2 4 × 5/8 4 × 3/4 4 × 1

16 × 32 4 × 1/4 4 × 3/8 5 × 3/8 5 × 1/2 6 × 5/8 5 × 3/4 5 × 1

16 × 48 4 × 3/8 5 × 3/8 5 × 1/2 6 × 1/2 6 × 5/8 6 × 3/4 6 × 1

20 × 20 3 × 1/4 3 × 3/8 4 × 3/8 4 × 1/2 4 × 5/8 4 × 3/4 4 × 1

20 × 40 3 × 3/8 5 × 3/8 6 × 3/8 6 × 1/2 6 × 5/8 6 × 3/4 5 × 1

20 × 60 4 × 3/8 6 × 3/8 6 × 1/2 8 × 1/2 6 × 3/4 7 × 3/4 6 × 1

24 × 24 4 × 1/4 4 × 3/8 5 × 3/8 5 × 1/2 6 × 5/8 5 × 3/4 5 × 1

24 × 48 4 × 3/8 5 × 3/8 5 × 1/2 8 × 1/2 6 × 3/4 6 × 3/4 6 × 1

24 × 72 4 × 3/8 6 × 3/8 6 × 1/2 8 × 1/2 7 × 3/4 8 × 3/4 *

30 × 30 4 × 1/4 4 × 3/8 6 × 3/8 6 × 1/2 6 × 5/8 6 × 3/4 5 × 1

30 × 60 4 × 3/8 6 × 3/8 6 × 1/2 8 × 1/2 6 × 3/4 7 × 3/4 *

30 × 90 4 × 1/2 5 × 1/2 6 × 5/8 6 × 3/4 7 × 3/4 8 × 3/4 *

36 × 36 3 × 3/8 5 × 3/8 6 × 3/8 6 × 1/2 6 × 5/8 6 × 3/4 6 × 1

36 × 72 4 × 3/8 6 × 3/8 8 × 1/2 8 × 1/2 7 × 3/4 8 × 3/4 *



9/22/03 19-7

TTaabbllee 22-- MMiinniimmuumm FFaaccee BBaarr CCoommppeennssaattiioonn –– CCiirrccuullaarr OOppeenniinnggss

THICKNESS OF PENETRATED PLATE (INCHES) (TP)OPENINGDIAMETER(INCHES) 1/4 3/8 1/2 5/8 3/4 7/8 1

3 2 × 1/4 2 × 1/4 2 × 3/8 2 × 1/2 4 × 5/8 3 × 3/4 4 × 1

4 2 × 1/4 2 × 1/4 2 × 3/8 2 × 1/2 4 × 5/8 3 × 3/4 4 × 1

5 2 × 1/4 2 × 1/4 2 × 3/8 2 × 1/2 4 × 5/8 3 × 3/4 4 × 1

6 2 × 1/4 2 × 1/4 2 × 3/8 2 × 1/2 4 × 5/8 3 × 3/4 4 × 1

8 2 × 1/4 2 × 1/4 2 × 3/8 2 × 1/2 4 × 5/8 3 × 3/4 4 × 1

10 2 × 1/4 2 × 1/4 2 × 3/8 2 × 1/2 4 × 5/8 3 × 3/4 4 × 1

12 2 × 1/4 3 × 1/4 3 × 3/8 3 × 1/2 4 × 5/8 3 × 3/4 4 × 1

14 2 × 1/4 3 × 1/4 3 × 3/8 3 × 1/2 4 × 5/8 3 × 3/4 4 × 1

16 2 × 1/4 3 × 1/4 3 × 3/8 3 × 1/2 4 × 5/8 4 × 3/4 4 × 1

18 3 × 1/4 4 × 1/4 3 × 3/8 3 × 1/2 4 × 5/8 4 × 3/4 4 × 1

20 3 × 1/4 4 × 1/4 4 × 3/8 4 × 1/2 4 × 5/8 4 × 3/4 4 × 1

24 3 × 1/4 4 × 1/4 4 × 3/8 4 × 1/2 4 × 5/8 4 × 3/4 4 × 1

30 3 × 1/4 4 × 3/8 5 × 3/8 5 × 1/2 6 × 5/8 5 × 3/4 4 × 1

36 4 × 1/4 4 × 3/8 5 × 3/8 5 × 1/2 6 × 5/8 5 × 3/4 5 × 1



19-8 9/22/03

SUPPORT

DECK

1/8 SPAN

1/16 SPANSEE NOTE 1

D= DEPTH

DO

DP

DF

DC

DH

MIDDLE 3/4 SPANSEE FIGURE 3

NO HOLES

NO COMPENSATION

WITH COMPENSATION

:

DH 1/8 D

DO 2 DH

DC 2 DH (BUT NOT LESS THAN 75MM)

DF 1/3 D

DP 75MM

:

DP DH (BUT NOT LESS THAN 25MM)

≤

≥

≥

≥

≥

≥

CONDITIONS TO BE MET

1. 1/16 SPAN NOT TO BE LESS THAN ONE BAY (SEE FIGURE 18).2. SEE SECTIONS 19, 19.1.1, AND 19.1.2 BEFORE APPLYING THIS SKETCH.

NOTE(S)

FFiigguurree 33 —— GGiirrddeerrss,, BBeeaammss,, aanndd SSttiiffffeenneerrss -- SSiinnggllee RRooww ooff SSmmaallll PPeenneettrraattiioonnss iinn 11//88 SSppaann



9/22/03 19-9

SUPPORT

DECK

NO HOLES

LDEL

D= DEPTH

DP

MIDDLE 3/4 SPAN

DF

WW

DCDH

DH

DEDO

1/8 SPANSEE FIGURE 2

NO COMPENSATION:

L ≤ 2/3 DW ≤ 2/5 DL/W ≤ 2DF ≥ 1/3 DDP ≥ 75MMDE ≥ 2/3 DDH ≤ 2/5 D, BUT GREATER THAN 1/8D

DO ≥ 200MM + OR DH1 + DH2 , WHICHEVER IS GREATER

DC ≥ 200MMDH ≤ 1/8 DDO ≥ 3DHDC ≥ 3DH, BUT NOT LESS THAN 75MM

WITH COMPENSATION:

L ≤ 1-1/2 D, WITH RINGW ≤ 1/2 D, WITH DOUBLERL/W ≤ 3DF ≥ 1/4 D, WITH RINGDP ≥ 50MM, WITH RINGDE ≥ 75MM, WITH RINGDH ≤ 2/3 D

DO ≤ 75MM +

DC ≤ 75MM, WITH RING


DH1 +DH2

2

DH1 +DH2

2

1. READ AND BEFORE APPLYING THIS SKETCH.SECTIONS 19, 19.1.1 19.1.2 ,

FFiigguurree 44—— GGiirrddeerrss,, BBeeaammss,, aanndd SSttiiffffeenneerrss -- LLaarrggee OOppeenniinngg



19-10 9/22/03


WITH COMPENSATION:

DP ≥ 50MM IF DS ≥ 75MM (AND VICE VERSA)

DO ≥ 75MM +DC ≥ 75MM

BHD (OR DECK)

DECK (OR BHD)

DH DH

DC

NO COMPENSATION:

DP ≥ 150MMDS ≥ 150MMDO ≥ 200MM + OR DH1 + DH2 , WHICHEVER IS GREATERDC ≥ 200MM

DH

DH1 +DH2

2

DH1 +DH2

2

DS

DO

DP

1. READ SECTIONS 19, 19.1.1, AND 19.1.4 BEFORE APPLYING THIS SKETCH.

2. SEE FIGURE 8 FOR RING COMPENSATION SIZING REQUIREMENTS.

NOTE(S)

FFiigguurree 55-- SSttrruuccttuurraall DDeecckkss aanndd BBuullkkhheeaaddss



9/22/03 19-11

NO COMPENSATION OR WITH COMPENSATION:

DP ≥ 150MM

DS ≥ 150MM

DO ≥ 200MM + OR DH1 + DH2 , WHICHEVER IS GREATER

DH ≤ 225MM (125MM IF NAVAL CONSTRUCTION)

MULTIPLE OPENINGS NOT ALLOWED TRANSVERSELY


NOTE(S)

DH

BHD (OR DECK)

DODH DH

DECK (OR BHD)

DS

DS

DPDP


DH1 +DH2

2

FFiigguurree 66—— SSttrreennggtthh EEnnvveellooppee



19-12 9/22/03

DC

DH

DC

DO

DHDH

ACCESS OPENING

INNER BOTTOM

SHELLDF

DS

DP

DS

DC

NO COMPENSATION:

DS ≥ 150MMDP ≥ 150MMDO ≥ 200MM + OR DH1 + DH2 , WHICHEVER IS GREATERDC ≥ 200MMDH ≤ 1/2 DDF = DH OR D/4, WHICHEVER IS LESS BUT NOT LESS THAN 200MM

WITH COMPENSATION:

DS ≥ 38MMDP ≥ 150MMDO ≥ 75MM +DC ≥ 75MMDH ≤ 1/2 DDF = DH OR D/4


1. SEE FIGURE 8 FOR RING COMPENSATION SIZING REQUIREMENTS.


NOTE(S)

DH1 +DH2

2

DH1 +DH2

2

FFiigguurree 77—— DDoouubbllee BBoottttoomm FFlloooorrss aanndd LLoonnggiittuuddiinnaall GGiirrddeerrss



9/22/03 19-13

DH

DO

* CONSULT PENETRATION CONTROL PRIOR TOPENETRATING SIDE SHELL WEB FRAMES.

BEAM

BEAM

S/8

SIDE SHELL

NO HOLES

S

S/8

NO HOLES

DF DH

DF

D

DH > D/3 - NOT ALLOWEDDH > D/8 - WITH COMPENSATION SLEEVEDH ≤ D/8 - NO COMPENSATION SLEEVE REQUIRED

DO ≥ 200MM + OR DH1 + DH2, WHICHEVER IS GREATER

DF ≥ DH OR D/4, WHICHEVER IS GREATER

DC ≥ 200MM

CONDITIONS TO BE MET*

DH1 +DH2

2

DC

DH

FFiigguurree 88—— SSiiddee SShheellll WWeebb FFrraammeess,, PPeenneettrraattiioonn CCoonnddiittiioonnss



19-14 9/22/03

A

TC

A

PER ABS ORNAVY

SECTION A-A

TP

WCTC

* FLAT BAR OR ANGLE HEADERS MAY BE USED INSTEADOF A RING WITH PENETRATION CONTROL APPROVAL.

SIZE DETERMINATION *

SEE TABLE 1 FOR THE MINIMUM FACE BARDIMENSIONS.

(TP - 3MM) ≤ TC ≤ 2TPTC ≥ 6MM(TP + 31MM) ≤ WC ≤ 16TP

FFiigguurree 99—— GGiirrddeerrss,, BBeeaammss,, aanndd SSttiiffffeenneerrss -- RRiinngg CCoommppeennssaattiioonn



9/22/03 19-15

TP

A

TD

A

WF

TW (TYP)

SECTION A-A

TP

TD

40MM MIN IF DOUBLERIS TO BE INSTALLEDLATER THAN SOC-2

W

D

NOT LESS THAN D (TYP)

WF

2 × D × TD = W × TPD = DOUBLER WIDTH

TD = DOUBLER THICKNESS

W = OPENING WIDTH

TP = PENETRATED WEB THICKNESS6MM TD (TP + 1.5MM)≤ ≤

SIZE DETERMINATION

FFiigguurree 1100—— GGiirrddeerrss,, BBeeaammss,, AAnndd SSttiiffffeenneerrss -- DDoouubblleerr CCoommppeennssaattiioonn



19-16 9/22/03

1. DOUBLER WIDTH "D" SIZED PER FIGURE 9

2. GAP "G" = TC + TD + 6MM.

3. RING SIZED PER FIGURE 8.

4. IF "G" MUST BE REDUCED TO PROVIDE AN ADEQUATELY SIZED DOUBLER ON A COMMERCIAL CONTRACT, THEDOUBLER SHOULD BE WELDED DIRECTLY TO THE RING (G=0).

5. FLAT BAR HEADERS MAY ALSO BE USED INSTEAD OF A RING. THIS DETAIL MUST BE APPROVED BY PENETRATIONCONTROL AT EACH INSTANCE.

SECTION A-A

"G"TD

TP

W

TP

GAP "G"

TC

NOTE(S)

FFiigguurree 1111—— GGiirrddeerrss,, BBeeaammss,, aanndd SSttiiffffeenneerrss -- DDoouubblleerr aanndd RRiinngg CCoommppeennssaattiioonn



9/22/03 19-17

PLATE

WELDSEAM

PLATE

75MMMIN

RECTANGULAR OR OVALPENETRATIONS

CIRCULARPENETRATION

CLEARANCE OF LESS THAN 75MM MUST BE APPROVED BY PENETRATION CONTROL ON A CASE-BY-CASE BASIS.

NOTE(S)

FFiigguurree 1122—— PPeenneettrraattiioonnss iinn WWaayy ooff WWeelldd SSeeaammss PPrreeffeerrrreedd MMeetthhooddss



19-18 9/22/03

25MM MAXOFFSET

75MMMIN

RECTANGULAR ORFLAT OVAL PENETRATION

CIRCULAR PENETRATION≥75MM Ø UP TO 200MM Ø

CENTER ON SEAM

CIRCULAR PENETRATION>200MM Ø UP TO 300MM Ø

WELD SEAM

CIRCULAR PENETRATION>300MM Ø AND UP

50 MM TO FILLET WELD

50MM MAX OFFSET

1. USE OF THIS DETAIL MUST BE APPROVED BY PENETRATION CONTROL ON A CASE-BY-CASE BASIS.

2. THIS DETAIL MAY NOT BE USED FOR PENETRATION DIAMETERS LESS THAN 75MM.

NOTE(S)

FFiigguurree 1133—— PPeenneettrraattiioonnss iinn WWaayy ooff WWeelldd SSeeaammss OOppttiioonnaall MMeetthhoodd DDuuee ttoo SSppaaccee CCoonnssttrraaiinnttss



9/22/03 19-19

ACTUAL DEPTH OFSHEAR STRAKE

ACTUAL WIDTHOF STRINGERSTRAKE

S

UPPERMOSTSTRENGTH DECK(ONLY)

S

S = MINIMUM WIDTH OF SHEAR STRAKE AS DETERMINED BY CLASS SOCIETY (E.G., ABS) RULES

NOPENETRATIONSALLOWED

FFiigguurree 1144 –– NNoo PPeenneettrraattiioonn ZZoonnee aatt SShheeaarr SSttrraakkee//SSttrriinnggeerr SSttrraakkee



19-20 9/22/03

1. NO PENETRATIONS IN AREA 'B'.

2. IF PENETRATIONS IN AREA 'A' THEN NONE IN 'D' AND VICE VERSA.

3. IF PENETRATIONS IN AREA 'C' THEN NONE IN 'F' AND VICE VERSA.

4. IF PENETRATIONS IN AREAS 'D' OR 'F' THEN NONE IN 'E' AND VICE VERSA.

5. PENETRATIONS IN AREAS 'A', 'C', 'D', 'E', AND 'F' MUST BE LESS THAN 50% OF CUT THROUGH STEEL IN ANY DIRECTION OR COMPENSATED

BY AREA WITHOUT DOUBLERS (I.E., INSERTS REQUIRED).

RULES FOR PENETRATIONS IN BULKHEADS, GIRDERS, OR FLOORS IWO STANCHION TOPS AND BOTTOMS

STANCHION SUPPORTED BY PLATE MEMBERS

45°

DECK

FLANGE

PRESENCE OR ABSENCE OFCHOCKS AND/OR BRACKETS DONOT AFFECT THE NO-PENETRATIONZONE

DECK

50MM 50MM

C

FED

DECK OR SHELL

A

STANCHION SUPPORTED BY FRAME MEMBERS

FLANGE

D MAX = 3W

W45°

GIRDER ORTRANSVERSE

GIRDER ORTRANSVERSE

B

BACKINGCHOCKS

FFiigguurree 1155--LLooccaattiioonnss ooff PPeenneettrraattiioonnss AAbboovvee//BBeellooww PPiillllaarrss aanndd SSttaanncchhiioonnss



9/22/03 19-21

W/4

100

H

L1

W/4

W/345°

W/4W/4

100

305MAX

900MAX

L

NO H

OLE

S

NO H

OLE

S

DECK OVER(NEED NOT BE CONTINUOUSTHRU BULKHEAD)

1 2

3

2 1

NOTESNOTES

GREATER OF 2R OR W/4

W W/4

45°

LOCATING DIMENSION JOINER DOOR CUTSR

1. IF THE AVAILABLE DISTANCE BETWEEN THE TOP OF THE DOOR AND THE DECK IS LESS THAN 915MM, THEN "L" IS EQUAL TO THE AVAILABLE DISTANCE.

2. ONE HOLE ONLY ALLOWED IN HORIZONTAL CENTER OF ZONE '3' (CAN BE IN ANY VERTICAL POSITION IN THAT ZONE).

3. L1 = W/2.

4. H = 2/5L OR 366, WHICHEVER IS LESS.

5. = MAXIMUM 2 HOLES EACH AREA DIAMETER £ L/10 (MAX. DIAMETER 100MM). MINIMUM EDGE-TO-EDGE SEPARATION BETWEEN THESE HOLES AND ANY OTHER TO BE 3 × DIAMETER OF THE LARGEST HOLE.

6. = MAXIMUM ONE HOLE EACH AREA DIAMETER £ L/10 (MAXIMUM DIAMETER 100MM).

7. = NO ADDITIONAL HOLES.

8. SITUATION SHOWN IS FOR CUTS ABOVE A DOOR. FOR THOSE CASES WHERE DOOR LOCATION IS WELL ABOVE THE STANDING STRUCTURAL DECK, THESE CRITERIA APPLY BELOW AS WELL.

9. AS SHOWN, NO COMPENSATION REQUIRED.

10. WHERE STEEL SLEEVES ARE PROVIDED, AND THEY ARE OF THE SAME GRADE AS THE PENETRATED STEEL, THEN MAXIMUM DIA REFERS TO THE INTERIOR OF THE SLEEVE. OTHERWISE, THE CUT IN THE STEEL SHOULD BE USED.

FFiigguurree 1166 -- RReessttrriicctteedd AArreeaass ffoorr HHoolleess iinn LLoonnggiittuuddiinnaall SSttrruuccttuurraall BBuullkkhheeaaddss oorr DDeecckkhhoouussee SSiiddeess



19-22 9/22/03

150MM

TANGENCYPOINT

2 × B

B

A1

A2

75MM MIN

75MM MIN

CUTS IN THIS AREA (P/S) LIMITEDBY F&A REQUIREMENTS

LONG

LONG

LONG

LONG

LONG

TANGENT TO RADIUS OF CUT

CORNER RADIUS

CUTS NOT PERMITTEDIN SHADED REGION

2 × A1 MIN

CUTS PERMITTEDIN THIS AREA

45°

75MM MIN

2 × A1 MIN

FFiigguurree 1177 –– RReessttrriicctteedd AArreeaass ffoorr HHoolleess NNeeaarr MMaajjoorr OOppeenniinnggss iinn DDeecckkss



9/22/03 19-23

WHERE SLEEVED OR LAP RING PENETRATIONS ARE USED, DISTANCE DH SHOWN ONFIGURES IS TO BE MEASURED FROM THE INSIDE OF THE SLEEVE OR RING.

NOTE(S)

SLEEVE

DECK ORBULKHEAD

LAP RING

75MM MINFOR WELDING DO

DO

DECK ORBULKHEAD

SLEEVED PENETRATION

DH

75MM MINFOR WELDING

DH

FFiigguurree 1188 –– PPrrooxxiimmiittyy ooff SSlleeeevveedd aanndd LLaapp RRiinngg PPeenneettrraattiioonnss



19-24 9/22/03

SSS

S/16 S/16

S/16S/16

S/16

S/16

S S

S

S/16S/16

S S

S/16

S/16

S/16

S/16

S/16

S/16

MAIN DECK

2ND DECK

2ND PLATFORM

AT LEAST 1 FULL BAY

1ST PLATFORM

NOT TO BE PENETRATEDS/16 NOT TO BE LESS THAN 1 BAY.

NOTE(S)NOTE(S)

FFiigguurree 1199 –– RReessttrriicctteedd AArreeaass ffoorr HHoolleess iinn WWeebb FFrraammeess



9/22/03 19-25

25% OF BAY RULE

IN GENERAL, NO MORE THAN 25% OF THE STRUCTURE IN A BAY SHOULD BE TAKEN UP WITHPENETRATIONS (IN AGGREGATE). SITUATIONS WHERE THIS WOULD BE VIOLATED MUST BEREVIEWED WITH IDNA.

25% OF BAY RULE FOR MULTIPLE PENETRATIONS

NOTE THAT THE AREA BEING DEDUCTED MUST INCLUDE THE LOST AREA DUE TO STIFFENERCUTOUTS, AND ASSUMES THAT THE PENETRATIONS ARE "LEGAL" REGARDING RULES LISTEDELSEWHERE.

NOTE(S)NOTE(S)

H

W

ORIGINAL STEEL

HOLES OR OPENINGS

REMAINING STEEL

H ≤ 3W

FFiigguurree 2200 –– 2255%% ooff BBaayy RRuullee

Documents

General Penetration Guidelines