vicinity of Structure 3.1.1. Thus the column-olfset measurements served as a check cn the
total lateral structural deformation ubtained from tne exterior-wall-survey point measure-
ments. The results of the column-motion measurements are summarized in Table 2.1. The
complete data are contained in Sec. B.2.
2.2.3
Roof-elevation Measurements
iatiadida
A level survey was made on the roof of Structure 3.1.1 to determine the elevation of all
the roof survey points relative ty a common horizontal plane. The elevations of these points
were related to previous level surveys by assuming that the average elevation of the four
Table 2.2-—-SUMMARY OF ROOF-ELEVATION CHANGES
47
0
0
Q
eo
©
3
35
0
0
0
0
0
o
9
L
2
3
4
8
8
1
47
35
35
49
31
35
48
6
9
2
0
1
2
0
5
7
@
st
2
1
10
is
0
33
0
i7
uw
Nuriber of points shoving tndicated chacge in elevation
+O.0b ft £0.02 +O.03 ft
26
6
4
1
0
2
1
2
1
8
Q
8
0
l
u
0
13
t
13
0
6
*0.0€%
+O.05 ft
+ 0.06 ft
0
a
6
9
3
o
0
c
c
2
6
0
.
0
0
0
1
6
1
c
0
* See Sec. B.3,
corner points of Building 4 did not change. [hese joints were selected as the
points upon
which to base the elevations Levouse o2 the massiveness 241 extreme rigidity of Building 2.
The resulting elevations of otnet- points on the roof of Structure 3.1.1 seem 10 ve. .iy the reasonableness of this aasumption. On this basis the change in -< ation cf each roof survey point
a8 a result of Operation Ivy was cor wited, A summary of the resulling clevation changes is
given in Table 2.2. A sketch of the Gamage to the roof of Builcing 4 is given in Fig. 2.5. The
complete data are contained in Sec. B.3.
2.4
aE,
1
0
0
19
6
General Observations and Photesrapia
TIP Ee
438
t
0
0
0
§
t
Bldg.
No,
Total no, cf
usable survey
point measurements*®
q
1
0
0
i
°
49
31
35
0
re v
4
&
4
0
eee
0
Oft
TT oeERT NTTe wenL REErE eee mete
35
-0.01 ft
usp
1
2
{
u
Number PO of points s! howing ng | indicated
change tn elevation
0.12 ft —0,09 ft, -0.06 ft -0,03 f& 0.02 ft
aint wi
ments®
heehal ‘that otbrckLd duces
No,
ea
Total no. of
usable survey
point measure-
‘tekBab Sebald
Didg.
The damare to Structure $.i.1 caused by shot Mike of Operztion Ivy waa of the same order
The paneis of Building 1 sustained only slight damage due to air blast. A
4
24
‘
(a) Building 1,
ver
of magnitude as that caused by shot Easy of Operation Greenhouse. Figures 2.9 and 2.10 are
posttest views of the front and back of the structure.
eB
er
17
SECRET — RESTRICTED DATA
y- '
.
libs ead Ye cheats Kaaba ed ict i aaite oes
few additional haircrachs were discovered in the back of sore panels, but no additiona) major