Omaha daily bee. (Omaha [Neb.]) 187?-1922, 1905-12-06
CITY COUNCIL PROCEEDINGS
BngiOeers Report on the Hayden Building
Sent to Committee.
CHANGES IN SOME DETAILS SUGGESTED
Floor Test Partly Satisfactory and d
Further Experiment Proposed TO
Determine Exactly Its ABB
sOIute safety.

The board of engineers appointed by the
city council to inspect the Hayden Bros
building now under course of construction
and to determine whether 1t is safe and
viii be safe when Il is completed filed fits
report with the council Tuesday night
The report tells in detail of the investi-
cation of the board and It concludes by
recommending several changes in the pres
ent structure. The board found that the
load upon the foundation of the columns
had not been equally distributed and these
should be strengthened: IL condemns the
use OF cast iron columns In a ten-story
building; It recommends that further
test be made OF another panel of the floors
not tested by the engineers and suggests
the plan by which the tests should be
made the board found the floor beams
and connections are amply strong to carry
the load intended for them to carry; the
steel columns were found to be designed
to carry the weight TO which they will
be subjected: the board recommended that
ample wind bracing should be provided for
the entire building before stories are added
above the fourth story.
Copy sent to Hayden Bros.
The report il signed by all three members
of the board. City Engineer Rosewater,
o. V. p. Stout, professor OF civil engineer
ing at the State university, and T. l.. Con-
dron, consulting engineer. of Chicago. A
copy of the report in accordance with the
council resolution was sent to Hayden
Bros and is now under consideration by
them. The report was referred to the
committee on fire. water and police.
After the council meeting Building In
spector withnell said: II consider the
report has many good points in It, but 1
have nothing to say just at this time about
It or what action / shall take in regard
to the building
Details of Floor Tests.
The, report states that the plans OF the
building call for ten-story structure, of
which four stories have been erected. The
investigation covered the structure as now
completed and as 1t will be when the en-
tire ten stories are built The floors of
the building are of a type known as the
''Rapp system, the report said, and after
going into the details of the construction
II said test was made OF one of the fin
ished arches A load OF $500 pounds was
placed on an area of SKIS feet over the
middle section of one panel Considering
this load as carried by width of ten feet
TO the arch it IL equivalent to a uniform
distributed load OF 24O pounds per square
foot of floor surface. This. together with
the dead weight of the floor. makes total
load of $40 pounds per square foot or Sc
per cent greater than specified loads for
the floors, The defieesion under this test
load was one quarter OF an inch
The board then recommends that another
test be made OF another section of the
floor. which. under the plan proposed for
the test, should have a detection OF not
to exceed three-eighths of an inch after
tho load has been in position for twenty
| four hours. Should the floors stand the
tests proposed they should be considered
safe. In discussing the floors further the
report says:
The arches as designed may prove 10 be
sufficiently strong to carry the specified
loads IL the supporting beams are firmly
held in position TO resist the thrusts OF the
have S'c'T not been a." provided and we therefore
| recommend, before approving these noors
that in each end panel OF the floors and
in the floor there shall be provided a total
net sectional area of the rods of six and
one-half square inches of steel. In al
| other panels we recommend that there
/ shall be provided total net sectional area
| Of tie rods OF three and one-halt SQUARE
inches Of steel. All tie rods to be o.
structural steel having an ultimate tensile
strength per square inch of section withir
! 5000 pounds OF $4,000 pounds per square
! inch. and an elongation In eight inches OF
| 25 per cent.
Foundation Conditions.
OF the foundation the board reported
that the bearings on the soil under thu
foundations of the interior columns was
81 tons per square foot for the four-stors
building. which the board considers TO b
safe. but the reinforced concrete footing
under these columns are, in the opinion
| OF the board. not strong enough TO dis
tribute the loads produced by the four
story building, and should therefore b
CONTINUED on second Pase)