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.12 Catchbasin lids: to be designed to withstand H20 loading.
.16 Adjus
Ɵ
ng rings manufactured to:
.1 Concrete to ASTM C478M
.22 Prebenched manhole bases:
.1 Where precast manhole sec
Ɵ
ons are incorporated into precast base by
bonding to concrete benching, use precast reinforced concrete manhole sec
Ɵ
ons
to ASTM C478M complete with ladder rungs above benching.
.2 Where base benching is cast monolithically with manhole walls, reinforce wall
and joint sec
Ɵ
ons as speciĮed in ASTM C478M
MMCD Pla
Ɵ
num Sec
Ɵ
on 33 44 01 1.0.1 states requirement to
"…reference …and interpret
…simultaneously with all other sec
Ɵ
ons per
Ɵ
nent to the works described herein.
" This requires
simultaneous reference and interpreta
Ɵ
on of design standard ASTM C478M (plus ASTM C913),
quality standard CSA 23.4-09, SCC 3
rd
party veriĮca
Ɵ
on, and Diamond Precast Concrete’s
internal design and quality documenta
Ɵ
on.
Diamond Precast Concrete’s Manhole and Catchbasin products are designed in accordance with
ASTM C478M as required by MMCD Pla
Ɵ
num 33 44 01. (ASTM C913 was followed for Oil-Water
Separators)
MMCD Pla
Ɵ
num Sec
Ɵ
on 33 44 01 1.4.1 requires: "
Product to be cer
Ɵ
Įed to CSA standard(s) by
an approved independent third party cer
Ɵ
Įca
Ɵ
on body accredited by the Standards Council of
Canada.
" Diamond Precast Concrete is cer
Ɵ
Įed to CSA Standard 23.4-09. CSA provides third
party cer
Ɵ
Įca
Ɵ
on to Diamond Precast Concrete. CSA’s scope of Standards Council of Canada
accredita
Ɵ
on includes the Structural Safety and Performance of Concrete and Concrete
Products (ICS No. 91.100.30).
In some applica
Ɵ
ons concrete structures are at risk of corrosion, scouring, inĮltra
Ɵ
on or
exĮltra
Ɵ
on. In such applica
Ɵ
ons Diamond Precast Concrete integrates Concrete Protec
Ɵ
ve
Liners into its concrete products as protec
Ɵ
on to the at risk concrete. Concrete Protec
Ɵ
ve
Liners are non-structural elements. They do not add or take away from the structural integrity
of the underlying precast concrete product. Diamond Precast Concrete products with Concrete
Protec
Ɵ
ve Liners comply with MMCD Pla
Ɵ
num 33 44 01 so long as they conform to all 33 44
01’s requirements.
Upon comprehensive review, Diamond Precast Concrete Manholes and Catchbasins meet all
requirements of MMCD Pla
Ɵ
num Sec
Ɵ
on 33 44 01.
Sincerely,
Vincent Wang, P.Eng.(Structural)
APOC Engineering Ltd.