The San Francisco call., 1897-02-19
MERCHANTS TALK
Of PAVE MENTS
They Also Submit Their
Views in a Proposed
Order.
Would Have a Surety Guaran.
tee to Cover a Series of
Years.
Asph altum, Wooden Blocks and Wit.
ID Bricks They Say Should
Be Used as Materials.

The representatives OF the Merchants
Association were heard yesterday after
noon concerning the matter of street
pavements. The delegation was headed
by President Dohrmann and was accom-
panied by Ernest Mccullough, evil ongi-
neer, and by Bernard Bienenfield. The
delegation nearly filed the room in which
the Street Committee of the Board Of
Supervisors was sitting.
Mr.. Dohrmann opened the proceedings
with a brief statement, and then Mr.. Nc
Cullough read a long document which
embodied recommendations made by him
to and favora bly, considered by the Mer-
chants Association. The recommends
ticns had been put into the shape OF an
ordinance to amend Order 2146 of the
Board OF Supervisors, and in the pream bic
fairly defined the wishes of the associa-
ton, as follows:
Amending general order No. 2146 by adding
thereto specifications for paving with asphalt,
wooden blocks and vitrified brick, to amend
the specifications for paving with basalt
blocks and to provide Tor the paving of sc-
cepted streets with any other paving material
which the contractor will guarantee to main
tain in good order for five years from the date
Of the completion OF the work.
The section providing for q guarantee
is, in full, as follows:
Sec. g. Section 81 of the above mentioned
general order shall read as follows:
Sec. 21. Upon accepted streets which the
Board OF Supervisors has ccepted By ordi-
nance, whenever any repaving, is TO be done
any material may be used which the contrac-
tor will guarantee TO maintain in good order
for a period of not less than five years. The
guarantee shall be accompanied by bond
with some responsible surety Company as
surety, in the amount OF the contract price
Said surety shall be bound TO perform the
work if the contractor fail to do so, and the
contract shall specify that II at the end of the
five years, or other period, the pavement is
not In good condition, 1t shall be relaid with
the same or any other material which ia ac-
ceptable to the BoarI of Supervisors.
In the case of work done under this section
or in the.case OF any guaranteed work which
is not done under specifications provided for
otherwise In this order or the general order OF
which this is amendatory, the contractor
guaranteeing the pavement shall prepare the
specifications.
The foregoing provisions are the ones
which caused the principal discussion,
but there were others which were talked
over. One OF these was as follows:
Upon the concrete foundation, prepared and
LAID provided in section 4. shall be laid
layer Of asphalt wearing surface tn basis of
which, or paving cement must be asphaltum,
and the use of coaltar petroleum. Tesiduum
or of so-called artificial asphalts will moi he
permitted in any portion OF The work
There were many features which were
passed without comment, all the time
having been expended on the foregoing.
These were submitted to the Street Com
mittee, however, and will be the subject
of much discussion hereafter. Among
them we're the following:
The bssait blocks in the roadway TO be laid
so that each block shall be imbedded in the
sand, and all blocks must set firmly upon the
foundation in perfectly upright posi- ition
and as closely and compactly toge ther as II is
them. The in ,pydt
of blocks in any one line across the roadway
shall not exceed one quarter OF an inch. The
blocks shall not be less than 81 inches nor
more than inches wide, not less than nor
more than 10 inches long, and not more than
~ nor less than inches deep The minimum
number of blocks 10 the square yard shall
be 81.
In reference to asphalt paving some of
the more important provisions proposed
were as follows:
phaIt paving the bidder must deposit with
the Superintendent OF Streels the following q
samples, which he will guarantee to be equal
to the N aterials he will use: First, a sample
OF the carbonate OF lime or mineral dust; sec
ond, sample of sand; third, a sample OF the
| asphaltic cement; fourth, sample of the
liq uid asphalt; fifth, a sample not less than
six inches square, OF the required thickness
of the finished wearing surface. This sample
shall have corner broken off and a certifi-
cate of a competent chemist shall be filed
with it which shall state that the chemist
broke the piece off the corner and analyzed it,
and he shall state in said certificate the guam
titles of the materials therein and their
quality as shown by his analysis. The certif:
cate of the chemist shall be filed with the
samples at the expense of the contractor fur
nishing the same.
During the progress of the work the con-
tractor shall permit the Super intendent of
Streets to take samples of the materials and
test them 10 satisfy himself that the materials
used comply in all essentials with the samples
submitted with the bids
There were provisions concerning the