DEEP GALLERY SHELTERS.

DOCUMENTS CONS:ULTED.

Instructions of December 21, 1915, on I!,ieldworks for the Use of Troops of All Arms.

Manual for Commanders of the Infantry Platoons (General Headquarters, Third Bureau, 1916).

School of Mines. Various Army Notes on Deep Shelters. Note on De~p Shelters by Col. Cernesson (Engineer Instruc­

tion Cellter of the Army Group of the Center). Lecture on Shelters by Lieut. Col. Cazalas (Engineer Instruc­

tion Center of the Army Group of the Center). Extract from the secret note of general headquarters, dated

April 5, 1916, in regard to the information to be drawn ~rom the Battle of Verdun.

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TABLE OF CONTENTS.

Note on the construction of deep gallery shelters: Page. 1. Object................................................................. 7

II. Definition.............................................................. 8 III. Advantages............................................................ 8 IV. Summary descriptio~. •.......................................•••...... 9

Single shelter. . . . .•. . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . • . . . . . • . . . . .• 9 Group of single shelters .......................................... " 13 Double shelter. ..... .... ....... . .. .. . . .. .. . . .. .. . . ...... .... .. . ... ... 13 Underground barracks................................. .... ........ 14

V. FUndamental principles to be observed' in the construction' of .. deep gallery shelters:' . • •••.•...........•••.... .•••.••••..•.••.. . .•... . .. .. 14

VI. Defense of entrances •..........•...•...•.....•..... ,.................... 18 VII. Protection of Bhelters againllt grenades ......•.............. ',' . . . . . . . . . . 21

VIII. Protection of Bhelters against asphyxiating gas......................... 22 . Simple measures of protection.: ••••••••.....•....... : . . . . . . . . . . . . . . 22

Protection by ventilation and neutralizing of poisonous gas. . . . . . . . 23 IX. Organization of excavation work. ••••... •••••••••.. .••................• 23

Appendix I. Single Shelter for one·half platoon (central body with mai:ti gallery frame). • . • . •• ••• . .•• • . •. ••• . ••. . . . . . . . . . •. . .. . .. . . . . . . . 25

II. Single shelter for one·half platoon (body of the shelter with great '. gallery frame, first arrangement) ••.••......•....••••... _...... 27

III. Single shelter for one-half platoon (body of the shelter with great gallery frame, second arrangement). . . • •. . • . . . . • . . . •. • . . . . . . . . 29

IV. Group of double shelters, portion for one platoon.... •••• .. . .• •• 31

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NOTE ON THE CONSTRUCTION OF DEEP GALLERY SHELTERS.

I. OBJECT.

With the increasing iD.tenl'lity of bombardments, the question of shelters has become one of capital importance in the Qrgani­zation of sectors both from the offensive and defensive pOints of view.

As bombardments are executed exclusively with artillery of medium and large caliber, it is necessary that the shelters be able to resist the systematic and regular fire of medium-caliber artillery or of single rounds from the large-caliber gun most frequently used, for example, the 21-centimeter mortar. In other words, the shelters in question should belong to the class of works defined as bombproof shelters by the Instructions of December 21, 1915, on field works for the use of troops of all arms. (See Instructions of Dec. 21, 1915, No. 89, p. 43.)

Experience has, shown, on one hand, that the type of sunken ' shelters (see Instructions of Dec. 21, 1915,No. 128, p. 77) cov­ered with a filling of earth concealing three layers of round logs was not proof against the projectiles with delay:action fuses of the German 21-centlmeter mortars, even with a small charge of explosive (6,3 kilograms to 8 kilograms), and that on the other h~nd the type of shelter known as "deep shelter" (see Instruc­tions of Dec. 21, 1915, No. 128, p. 77) was able to resist projec­tiles of large caliber if the untouched soil above it was of the proper thickness, which again depends on the nature of the ter­rain and the kind of projectiles used against it.

Consequently, among the snnken shelters described by the In­struc£ions of December 21, 1915, under No. 128, only those con­structed.,underground, at a suitable depth, are !>ombproof in the sense given to this term in the above-mentioned instructions.

It therefore follows that tliis shelter, generally known as a (leep-gallery shelter, should be adopted to the exclusion of every other type, except in cases where a water-bearing stratum is en­countered near the surface.

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8 DEEP GALLERY SHELTERS.

It appears from the above that the Engineer troops, to whom the construction of such shelters is intrusted, should be thor­oughly acquainted with all details concerning the construction of these shelters. The Engineer troop depots of the interior must therefore lay great stress on that part of the' instruction • of sappers which deals with the construction of this type of shelters.

The object of the present note is only to facilitate the task of the officers of the above-mentioned depots by placing at their dis­posal a resume of the principles and details of construction now used by the armies in constructing " deep gallery shelters."

II. DEFINITION.

By deep gallery shelters are understood shelters executed by subterranean, as .distinguished from open-cut, excavation, the roof and walls of which are given a plank lining constructed according to the principles laid down by the School of Mines for the construction of mine galleries. (See School of Mines edition published Apr. 30, 1909.) The prescriptions of the School of ¥ines must be strictly followed, and, in particular, the precau­tions therein mentioned as regards strengthening the galleries must always be taken.

The caSing is generally of wood. (Note: Some types of . frames of reinforced cement, studied by the Technical Section of

the Engineers, are now on trial.) In this case, according to the resources at hand, the frames may be either of the ordinary standard type or makeshift frames of roughly squared logs (see plate 5).

If on good terrain large frame~ of· thick planks may be used for lining the entrance descents to the galleries (see plates 2 and 5).

III. ADVANTAGES.

Besides providing shelter against Single rounds of the 21 centi­meter gun with the means at hand in the field, the deep gallery shelter has the advantage of being easy ·to construct, and the enemy will suspect nothing if care is taken either to conceal the spoil or to unload it far enough away. .

The one fault generally found with this type of shelter is that it is slow to construct. This is compensated, in a certain meas­ure, by the fact that work may be carried on continuously as soon as the descents have attained a length of a few met~rs.

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DEEP GALLERY SHELTERS. 9

These descents then constitute shelters in themselves and are far superior to niches or temporary shelters.

IV. SUMMARY D~SCRIPTION. I

Deep gallery shelters are of two types -single and double. The former are' especially appropriate for troops guarding the first-line 4'enches.

Generally speaking, the single shelters are the most used. The, type of shelter to be adopted depends on ~ocal tactical

circumstances, but its choice is also subordinate to the nature of the subsoil and the contours of the terrain.

As to the nature of the subsoil and the situati0J:!. of the em­placement, experience has shown that it is best to make a careful examination of the terrain before giving up the construction' of deep shelters through fear of their being invaded by water. Simple solutions may often be found after a' close study. For instance, in certain places where only shelters of no great depth ha,d been undertaken the existence was discovered, at a. varying depth, but fairly near the surface, of a layer of thick clay, com­pact, without fissures, and, consequently waterproof. Deep gal­lery shelters were dug there, after the pervious upper layer had been previously drained and isolated within a certa~n radius by means Of ditches dug deep into the clay strata, which insured the draining of the ,water.

SING;LE SHELTER.

The single shelter generally consists of a horizontal gallery, dug underground to a depth depending on the nature of the terrain, and chosen in consequence, according to the indications given in Paragraph V hereafter.

Access is obtained by at least two distinct descents, at suffiCient distance from each other to prevent their being subject to the action of the same projectile.

The descents should be made as steep as possible, in order to diminish their length, in order, on the one hand, to reduce the amount of work required to construct them, and on the other to make them less vulnerable. Each descent generally de­bouches at one extremity of the main part of the shelter. The entrances to the descents constitute the most delicate part of deep shelters, as it is not possible with the means usually avail­able to give them adequate protection. They open on a trench or on a portion of an open, or covered boyan.

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10 DEEP GALLERY SHELTERS.

The protection of the entrances may be improved by· keeping their sills at a fairly low level, by deepening the .entrance boyau, and by reinforcing the covering of the armored portion of this boyau with layers of logs placed side by side and solidly joined together with wire or Cramp irons. - (See variation.-of sketch No. 6.) However, every precaution should be .takell to prevent the entrance of water.

To enable the gardson of a shelter to leave it, even if the trench has fallen into the hands of the enemy, it is wise when­ever the necessary time and personnel is available to provide an additional outlet easy of egress, debouching in the open country in real' or in front 6f t1!e trench. This outlet should consist of a gallery with gentle slope so as to permit of rapid evacuation. To deceive the enemy, it would be well for the ·relative pOSition of this third outlet not to be uniform with reference to the two others. Moreover, the eXit $hould be con­cealed as well as possible. If there is no natural or artificial depression within convenient distance around the shelter, the exit gallery may be made to end in a sloping sap, debouching in a shell crater, real or simulated, if the terrain is already torn up. In this case, care should be taken to disguise this sap to prevent its appearing on the aerial photographs. An easy and simple method consists in stretching a metal grating between the bems of the sap and covering it with a thin layer .of grass, straw, rafia, or branches. It may also be covered with ordinary canvas or awning properly adjusted.

This supplementary exit on the open country is. especially needed in shelters for troops guarding the first-line trenches.

It is also advisable to provide shelters of the latter class (shelters for first-line trenches) with underground comm~lnica­tion connecting them in front with th.e combat post8 for machine guns or, automatic riflemen, with the observing. stations and listening posts. In the first position8, where it is hardly pos­sible to transport materiel and armor, these stations, also well disguised, are equipped with shields (of a light type that can be transported in the galleries) proof against perforating bul­lets and projectiles of smaU-caUber guns (37-47 millimeters). In the second p08ition these posts or observing stations, also dis­guised, may be covered· with cement and equipped with armored roofs.

On account of the many and various solutions which may be devised, the dimensions and arrangements of detail of the shel-

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DEEP GALLERY SHELTERS. (

11

tel'S can not be strictly regulated. The types shown in the sketches attached to the present note ui:e only given as an indi­!lation.

It should be noted, however, that each shelter should be con­structed with u view to receiving a unit consisting of at Zeast one-half a platoon, as a rule. A smaller unit should not be con­sidered, for owing to the amount of work required by the con­struction of the descents to the deep shelters (which work is independent of the capacity of the shelters), the construction of shelters for a unit of less than one-half a platoon would re­quire .an amount o~ work out of all proportion to the object to be attained.

The capacity of the shelters is determined by the commanding officer in the orders relating. to the organization of the sectOJ~.

As for the arrangement of details and the preparation of the interior of the shelters, it will be sufficient to call attention to the following points:

1. in each shelter there should be. camp beds with two,· and sometimes in exceptional cases, three berths above ellch other (made of boards or wire trellis work with wooden frame), for a fraction of the unit in occupation, and a certain number of seats, the proportion of each to be determined by the command­ing officer.

2. Room for the camp beds may be' obtained by giving to the horizontal gaHery the profile of the grand gallery,' or else by opening on, a transversal service passage (in the main gallery or in the great gallery) cells of varying length of the dimensions required for the _installation of camp beds! ·These cells are generally constructed in the grand gallery. The width to be obtained by this arrangement is, per tier of berths, either three places side by side,· or two places separated by a passage; • the latter installation should be reserved for cases when the cell must contain several rows of beds in depth"

Two rows of beds of three tiers each are sometimes installed in the grand gallery, which with equal capacity gives more free space.

The cell system is often praised because it can be constructed progressively. It can be utilized as soon as the transversal gal-

1 See sketches 1 and 3. • See sketches 6, 1, 8, and 9. • See sketches 1 and 8. • See sketches 6 and 10.

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30 DEEP GALLERY SHELTERS.

Material required tor the oonstruotion ·of some of the various types of shelters, eto.-Continued.

III. SINGLE SHELTER FOR ~NE-HALF PLATOO~, ETC.~Continued;

Logs.

Diameter of Diameter of 0.10 moter 0.15 meter

Name of parts of and length and length shelter. of- of-

Rafters.

0.04 by

I----~--.I---~---I~~

0.08 by

0.08 me­ter. 3.5 4 3.5 2.1

me- me- me- me­ters. ters. ters. tera.

ter.

Strips, Bat-0.03 ten 0~b1 0.018 me- :~ ter.

Wire nails.

0.06 '0.15 to to

0.10 0.18 me- me­ter. ter.

-----1--------------------

1. Shelter proper.. 22

Me- Me- Me- Me- Kilo- Kilrr­ter,s ter8 ter8 ter8 gra/1M (Jra1Tl8

2 ............ . 26 ............ 18 8 4 2. Entrances and

descents .......... .. 8 80 ...... .................. 2

4 ........... . 4 4' .................. 1 3. Periscope room

and landings .. 4. Niches (e) (gren-

ades,ete.)..... ...... ...... ...... ...... ...... ...... ...... ...... .25 5. Interior arrange·

ments: (a) Bedsfor12

men and officer.... ...... ...... ...... ...... ...... 28 ............ 3

(b) Benches for 12.·men ................................................... 1

1.75

ee) Shelves.... ...... ...... ...... ...... ...... ...... ...... ...... 2

6. Cl~:e)~~~.:~ ................ ,. ....... ...... ...... 20 ...... .25 .... .. -------- ---- ------------ ----------------Tot~........ 26 10 80 4 37 28 20 18 17.50 .5.75

1 Sheet-iron pipe 0.15 in diameter, for periscope room, 7.5 meters.

IV. GROUP OF DOUBLE SHELTERS, PORTION FOR ONE PLATOON.

~E:t ~f:i Planks (roof),lengtb .

Main Great Name of parts of shelter. gal- gal-

lery lery flame. frame.

frame, 'Half frame, 1.33 gal- 0.80. 1 to by lery. by 1.10

1.110 frame. 1.64 me-me- me- ters. ters. ters.

1.20 to

1.30 me­ters.

1.50 me­ters.

---------1·-----.-------- ------------1. Shelter proper:

(a) First story...... 5 (b) Second story.... 16

2. Entranceanddescent ....... 3. Interior arrange-

19 5 8 ............. .

·9 3 23

7. 6

ments: • .

150 62

126

41 120

6

5 36 12

(a) C~mp beds for 12 men and officer ........................ : .............................. ..

(b) Benches for 10 men ............................... , ................................. .. 4. cf~t::el~:neis" (4' ........... '" ............. r ........................ ..

alilre) .•........•.... :..:.:..:..:.:::..:.:..:..:.:::..:.:..:..:.::::.:.~I.:..:.:..:..:...:..:.:..:..:..:..:.:..:..:.:::..:.:..:..:.::

Total...... . .. .... 21 I "17 I 22 28 I 13 338 167 . 53

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DEEP GALLERY SHELTERS. 31

Material required for the construction of some of the variotts types of shelters, etc.-Continued.

IV. GROUP OF DOUBLE SHELTERS, ETC.-Continued.

Planks, .casing. Logs.

Length. Diameter of . Diameter of

Mine 0.10 meter and 0.15 meter and Name ofparts ofshelter. bat. length of- length 01-

I----,----.----Ite~. 1----,----1-----,---

m t;i~o ~ me- me· ters. ters. ters.

3.50 4 3.50 2.10 me- me- me· me-ters. tei's. tars. ters.

-----------1----- ---- ---- ---- -------- ---- ----

1. Shelter proper: caUirststOry...... 196 202 (b Seoond story... . 226 330 .......

2. En noe and descent 340 20 58

54 Meters.

130 112 208

20 18 43

4 ............ .. 5

41 - ............ .

2 ...... .. 3. Int·erior arrange­

ments: (a) Camp beds for

lis men and offi·· oar ....... _ ......................................................... ..

(b) Benches for 10 men ................................................................... .

. 4. C~~rl~eis .. (2· .................... ·1 .... · ............................. . alike) ....................................... , ............................... .

Total ............. 762'"""552112r4508150---2-~

Inter· Rafters. vening Wood·

up· en- Planks rikhts Tim. st~kes, 0.027' .

lor bers diam· by 0 22 Stnps, Bat· ~at 'eter' 0 OS-by ten,

Name of parts of shelter. giill:lJ 0J~y 0.10 ::ter; 0.04 by 0.08 by '0.01 0.018 frame'meters meter; 2fo'i 0.08 0.08 meter. meter. 0 .. 11 by . length'meters meter. meter. 0.17 by 1.50 .

2.10 meters. meters.

-------------1---- ---- ---- ---- ---- ---- --------

1. Shelter proper: (a) First story .... .. (b) Second story .. ..

2. Entrarlce and

Square Meters. Meters. Meter8. meters.

2 ..................... IS .............. 5 10 ....................... 17.5 .................... .

descent ............. . 33 4 ....... 40.0 3. Interior arrange·

ments: (a) Camp beds for

36 men and officer......... ....... ....... ....... ISO....... 12.5 ............. .

(b) Benches for 10 men ........ ·'. ....... ....... ....... 7 ........................... .

4, Cf~~el';:neiS .. (4· ....... ....... ....... 6 ........................... . !ilike) .............. · ....... 1....... ....... 8 ....... ....... 12 .... -..

TotaL ........... "--i2T--331---4- 201173:512.5'~ --5

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32 DEEP GALLERY SHELTERS.

Material required for the construction of some of the various types of shelters, etc.--Continued.

IV. GROUP OF DOUBLE SHELTERS, ETC.-Continued.

Name of parts of shelter.

1. Shelter proper: (a) Fitststory ........... , ........ . (b) Second story ............... ..

2. Entrance and descent ............ .. 3. Interior arrangements:

(a) C~~ce~~~.~~:.~~ .. ~.e.~.~.~. (b) Benches for 10 men ......... .. (c) Shelves ...................... .

4. Closing panels (2 alike) ........... .

Total .......................... .

Wire nails.

0.64 to 0.10

meter.

Kilo-grams.

4 3 5

0.15 to O.lS

meter.

Kilo· grams.

2 1 3

Planks, 0.22 by

O.OS meter.

, Meter8.

Canvas.

Meters.

30 ............ ..

6 .............. , ....... ' ............ . 0.50 ................................. ..

gj~ :::::::::: :::::::::: "i:i;ii'byi:so 19 6 30 2 (1.50byO.90)

NOTE.-The following. must also be provided: Wedges, slope templates, and wooden lining for the construction of the galleries; 6 clam;!! irons with points m the same direction; 24 bolts 24 centimeters long, 5 boltslS centimeters long~ and 21 bolts 13 centimeters long for the entrance to the snelter, and also tbe wire to oind togetber the logs forming the cover of this entrance. .

The material for tbe third exit and for tbe defense of this shelter is also not included in the above estimates.

o

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~ 0 c ~~ -0 (7)

Q) -oS:. +i 0 en (lJ -.... t\l +-.. ~ 0 o to

z::: E s. <0 U " ) C::C ~ '5 ILLJ UJ

~ Cf) r. <{ c:x ~ LL LL.,.J ~ 0: J:: 11...1 -J

~ -J ~

LL.I \0 i:: ---1 <C :E

\9 -Ig ~ z:: - §F -z: b ~o 0

o ~ tL h: <{ . <t ex o -LJ I--o..E u

LLJ~± CI. !::

CL ~ ~ >- fa {-- ~

~

I

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PLAN I

ToO . LE:.6E:ND·

'--- - -----....J

: A. Portion of'main g-allery wIth camp beds for 12 men. ~I

~: 5.5mall store rooms for food, I Iquids, tools and Infantry ammunition. • I : C. Trunk of 2re~t gallery with benches Tor six men (2alike)

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\

r-:~-:=~-: ~--::::: ---------::: 4.8Q_ :-::.-::=:::: :::-:~t-: :::-::;::::::::::::+'iig:;: :::::-:::;::::~ :-:::j

f

Cross Section

''i-/v.:.~~ . ..,;4--a2l2.·~- - ___ - _____ 2.22 --- _______ ~

Q): I

a.: : 0' . u: : C1) ••

-£; ~ a.: :

~ii -i:

~l! ~~ ~

11 · . · . · . · . · . · .

. ______ .. _2.'1d __________ ~

(.3JWlnd brac,ng,cross beam see detail In

sketch No;

r.;n Cross Section

~

'" (6) Well for periscope ~

C'\ ::s-

C.D.

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L J

c... \..J\ Q) A

rtI ::s -+-C n Q) ::r

~ ::z !=>

N N III Q) -+ -+

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'-D ()

:::r ':'-.J (b

D.. --+-0

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~~ -6 0--'

~; # , 'J -...

~C\J

10 0 ~ en " ::s o c::: .c CO

~~ ~ 0

~-B ~ c

al LL.I

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4,)

E CO ~ L1..J

:r:: ~ 0 ~o ~

0 ~ 1lJf-t

.:...J:S .... o~ ~ c..-\N ~ _~ ...s::-\S) <:> ±:

J£.o ~

L '-o ~

LlJ ~ ~

Il\

>-c..-o

r- ~ 0

C!:::-

" I 15T. ARI2Ar16EMtrrr 100

, I

~%;~~w~L;' r 1.<11

! ,I

Z nd. Arran8"ement TI>Q

~·,:.··,-IOOJr;.. ~ 't ~-~/ ~- :. '"'/:: -'~ -~!:- -::.; ..=;.~ ~:-~ t -.;;.- -;- -:E-- .- - -_-.._ .... _..J,

Note.-In order nOT to overcrowd t~e dr8WIO~,the braces(shown In thauts) are n~ shown on the Gorrespondint'plc::n .and the roof and caslllg-planks are repre,ented ~ two conti nllC'lS lines,.

: '\ '

=;1

UGfflJ a-a' camp bed foll" 112'mr.en.

-ttorri,orttaf E)races l.otO.'Om.

b-b'5)Jaces w.ith '~.:l\m_L toafsJafarttry ammu niion.,i(na\· f'OCK-eT!J., (-C' ~etXhe, for l2~ mernl..

d-d' Offlce~, room.

"

';,

e~e·l1iche."Jforhand ~~~apraf:Ef$­

anti-res :1Olution.s. f-f Descent!> in mine B5eS{~dl:awintafitJesit~ ilnl1lf~ 1 ~z fift Jrd'exim Dnto the apen: cmwntllY

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TYPE. OF- 5INGLe. 5t\E:LTcQ. rOR i DLATOON

Defsib of the type hsvinabody with ereat gal le-ry frame

J)etai I of the .junction M of the upri~h+.5 and tl4e caps

(5ee 5~e+ch No.:J Cut foliowin[C p) Cleat, 27'%, /11m/50c.m. insurint'

!5ketch No.4~ached to nbte OT Janua!:y ~, st.

1917

'front View( to) /- the connection of the two adjacent - ca ps of two connected frames. -

.5ide View{;'o)

Cleat 4cm/'2'2cm/30cm. insvr-ing the connection of tlie conti(uouS uprig of 2 connected frames, in the upper part. (A similar CI~8~ connect, the uprie'hts .in t/:le lower part~

- Cro" .?ection K-L

0/ ________ .!L~o _____ _

- _____ ~U-----I

5heff

(leat4cm.j scmj22cm. 'for hldin£fthe log brace to prevenl- pl'!Y

Traverse ;ection of a berch

jcale(fc;) :v;,'

0," , (

.J,

I

! _________ .... ______ ""! ___ • ___ ----....I

DcTAI L Of" A 5E"D

jcale 10 Cro.ss 5ection (i-O

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~ Cap ~I J.c- - - - - - 0,96 __ - - --.: • I I " I

8 T .. I I I I I I

,. 3 ~--- ..D. SQ.. _ ~ __ • 8f-I I

r;OTE:.: THE. ,ILL I" LIKE::.

TftE:... CAP :--

-. I

I

I I i ~

"f'I?AM e Of' HALF­

GALlEJi{Y

I

t,roflle of! Vpright

01 If)I ... ..... 1

Sketch No.5 $ttached to note of January 2l.5t· 1911

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~ ~ '<'l ~ -- -l- - -- .:i,~Q. - - - - -

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I

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I I 1

• 8 .. fRAME: WOI2K fOQ. OF-f"'ICE:I2S f200M frame work of ire at gallery

-. ~I ~l"

...:t Profile of upnght

Note: The IO£!5 irlthespecial frame work are roughly sg'usred mnd hsve a minimum disl11eterofO.20m.

I ----r ~

I I

J i I I I

d 081 J ,~

..... 'Profile of Pi liar

.,} 0'11

~ I I

I ·1 I I I I I

J..

lOF1GITVDJI'1AL WIND .Bf2ACII'IG Thi~ must-affect stthe same time

CAP .. he cap (01" tile sill) and the upr-ISJ,f )..

The framework of tne main _~ ____ ""'~~ _'_;~.~~====:==;=~~ gallery which i'5 '!>im ply U.lu·m.\.'~IU.?~ 5eam)

the regulation frame work has the.refor '10+

been :;,hown on the prese ... + sketch.

Cut A."5. .Elevation C.D. Elevation C,D'

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I I f I I I I I ,

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Oh4(jR~M5 0;:- TYPe5 OF SINGLE SHEL.TcR.5 WITH CELL5 Scale or 400

This fyp~ ,.:seJen~rally subsf/lufedrortype qf double shelfer ~hown in ~lrefches 7and 8

5lrefch N()./ J/'eller wifh shorfcel/s ....

51(£Tcf/ IfQZ Slu:lfer 1()(J.mefers /()~ wit'h lorge cells

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81 USIn)' three s~ory beds ondor rt7.'l9'tn9 theminfheh70nner h shownbyfhe 5/refc Me copocifyo/tl sneller foracodJpo'!Ym'l/ /le:?JI p/oces.1J;e necessary room CQn tfJeMlOr oe reserved ~rof"F/cer.5 jdrqsmo//office*sfore /"Oom-ono' IPr (In C'lecfl'li;

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SKETCH NO.4 Army Corps CommQ/lq Po~1:

51(t=rCH NO.3 (Jrol.lp 01" fwo shelfer s w/fIJ 1t7r'j'e cel/5

51refd #0.6 o#r;c/;ed fo Ilole

~f ./qnVQty flsf /917

D/sfribufiOfil of th-e fi-ome wor/. , ;;;;(7",;;0.60-;; from QXI'J f(Jo;r15. Zmeans (J.20m romends/o

o xis. 8m"ons O.BOm rom oxis10 ox/s. IOm<:anslm. romq;c15t(Jo~/s

l.'f.GE:ND A·Cells D-.Pescen+s 13M-Main g'""sllery

GG- Gt'eat gallery o-Ventilation s'haft

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GROUP Or OOUBLc .5HeLTcR5 • POPTIOIY - T()/2 OIY.E PLATOON

N. 8. ()" 11,e' ,oltJ'l lI·fj-C-P-c-r. J'h(" hor"~t7n 101 p,..,c~.:! 0/" ot7tl; slw-,e's"" th(' oodY(1/ 1If(" "'-;'.-Ift!r ore re~h>5el?led

.oj" q¥f'''l'/-ed /rne The ·vari(JV5 ,?rqce.s c/lnt' ~xenls

Qre·nul.5/1OW/1 tJl7 t~/spll'" "1 tJrut'r //01 10 ("'P"~ d fht' clroty'~ OW

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GROUP Or OOI/8LE. 5f/ELTeR5

TYPe.. Or j?OlZT/OIY rOt'? ONe. PL/lTOOI1

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5kl!'fch #0..8 q/;bched fo /lore or Jq/lL/4'cY 2/sr;~/7.

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TYPE. Or 51N6LE 5f1eL7e12 Or Tf!c'c1Y611'teLR (IY.5TRtJC770IY.%IiOOL OF TftC ARMY (JROVP Or Tlfe ceNTeR

lOr ,P/qroon ort plcd"Qol7. With verM:g/ t76~/Qc/t:' Q/)q'de;C-l.'.7cC' ur the C'n/c-l"Once

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TYPe Or J/1I6LC 5f1eLTeR Or Tile c-1'/(j/lieER /IY:?TI?UCT/O/Y 5ct/OOL Or- THeAIZI'1YOIZOUP Or- THe C~IYTc,e

ror j7/o;/-oon or ~ plofoon tfjfh y;<:rftcal tJo':,fac/e ond'de/:/lce cY rile t:"/l/e/l:7/lce

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Ngn/ler i/l which 810Ch-S qr~ joined

dJ t400 lifers o/501Jd t-t/OO lirery or f'rQvel '1"400 ~ ki/Ofrg/lJJ or Porl/ono' ceme/'JT.-O.o24m .:J

~ eOU/1f:l ~feel bars 10mb!. i", cki7/lJt!"Ier, wepnr: a .Jj A-tlo/romj

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OEFeNSE or DESCENTS AND PROTeCTION ~GAIN5T GRENAO£.5

Ob~focles or bofto"m or desc~nt- 40

ObsfClc/e on middle lal7d//7g ~

Secfion t-r

.5lrefchJll!.lYoffqCIl~ J'p qole orJonvt7c,v 2/S I--;Y1l

Nofe :-/n drawing -fhe5e slrefche~ if 15 .5UPPo.5ed rhof the grot/no' is d/ medium nqrdne:J$ ond Thol~e oosrqc!e$ orelo 6e 6ul/1--a/ler The .5nelfer is I/nishecl. /n order 1701 '0 overcrowd the drqwlng the rnlne o(lf/en.5 dI1QYQr/()(/"

w/nd- bracing .sf-rub are 1701-ShoWn.

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