Operational Woks Application OPW18-0071, Plans 2 of 2 · OPW18/0071

 

 

da

75°

 

 

Area
28 m?

 

 

 

 

 

 

 

 

ce Area
TOTAL ROOF CATCHMENT ~ ae 2s
AREA 225 m2 167 m? ——
(6 DOWNPIPES REQUIRED @40sqm/DP) (5 dp’s}

8 DOWNPIPES PROVIDED

 

  

 

dp

 

dp

 

dp

(dp

 

 

 

 

() ROOF CATCHMENT PLAN

/ 1: 100

 

 

 

 

 

 

‘Controlled back gap with—

 

(a)la permanent minimum 10 mm spacer
installed between the gutter back and
he fascia; and

 

‘b)ione spacer per bracket, with the spacer

5
not more than 50 mm wide: and 1

 

2

the back of the gutter installed a
minimum of 10 mm below the top of the
fascia.

 

 

 

 

 

Top of fascia

Spacer

(GUTTER INDICATIVE ONLY}

 

 

(> GUTTER DETAIL
\ NTS

ROOFWATER DRAINAGE GENERAL NOTES:

ALL ROOFWATER DRAINAGE SYSTEMS MUST BE
CONNECTED TO A STORMWATER DRAINAGE
SYSTEM COMPLYING WITH BCA PART 3.1.2,
DRAINAGE OR AS/NZS3500.

THE ROOF DRAINAGE SYSTEM MUST BE PROVIDED
WITH AN OVERFLOW TO PREVENT THE BACKFLOW
OF WATER INTO THE BUILDING.

THE AREA SPECIFIC RAINFALL INTENSITY MUST BE
SELECTED FROM BCA TABLE 3.5.2.1 OR FROM
AS/NZS3500.

GUTTERS AND DOWNPIPES MUST BE SELECTED
FROM BCA TABLE 3.5.2.2 OR FROM AS/NZS3500.

EAVES GUTTERS MUST BE INSTALLED AT A FALL NOT
LESS THAN 1 IN 500 WITH SUPPORT BRACKETS AT
1.2m MAXIMUM CENTRES.

BOX GUTTERS MUST BE INSTALLED AT A FALL NOT
LESS THAN 1 IN 100, IN ACCORDANCE WITH
AS/NZS3500.3.

THE WIDTH OF VALLEY GUTTERS SHALL BE IN
ACCORDANCE WITH AS/NZS3500.3 AND BCA PART
3.5.2.

REFER TO ROOF SHEETING MANUFACTURERS
SPECIFICATIONS FOR LIMITATIONS ON SHEET
OVERHANGS INTO VALLEY GUTTERS.

THE MAXIMUM ROOF CATCHMENT AREA FOR
VALLEY GUTTERS IS 20m2.

VALLEY GUTTERS ON ROOFS PITCHED LESS THAN
12.5° MUST BE DESIGNED AS BOX GUTTERS.

DOWNPIPES MUST SERVE NOT MORE THAN 12
METRES OF GUTTER LENGTH FOR EACH DOWNPIPE

WHICH MUST BE LOCATED AS CLOSE AS POSSIBLE

TO VALLEY GUTTERS.

EAVES GUTTERS MUST BE PROVIDED WITH AN

OVERFLOW SYSTEM WHERE DOWNPIPES ARE

LOCATED MORE THAN 1.2 METRES FROM A

VALLEY GUTTER.

TABLE 3.5.2.1 RAINFALL DURATION INTENSITY

5 MINUTE DURATION RAINFALL INTENSITY
NOOSA HEADS -20YEARS = 258mm/h
-100YEARS 331mm/h

TABLE 3.5.2.2 GUTTER & DOWNPIPE SELECTION
FROM TABLE A & B

40sqm - A - MEDIUM RECTANGULAR GUTTER or
D -125mm D GUTTER

FROM TABLE C

90mm DIAMETER DOWNPIPE

TABLE 3.5.2.3 OVERFLOW VOLUME
FROM TABLE A

350mm/h —12.0m GUTTER [email protected] (L/s/m} = 18L/s
FROM TABLE B

350mm/h- 40sqm = 3.9(L/s)

USE CONTROLLED BACK GAP (SEE DETAIL)
= 1.5 L/s/m x 12.0m = 18.0L/s

 

 

bespeke

building design

Russell Willcox

Principal Designes/Director

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THESE DRAWINGS AND DESIGN ARE issue | DATE ‘DRWN/CHKD COMMENTS PROJECT DATE

COPYRIGHT AND WiLL NOT BE USED ~ DESIGN RECEIVED & ACCEPTED

OR REPRODUCED BY ANY MEANS, TaN 2/2017] RW | RW | PRELIMINARY PLANS PROPOSED RESIDENCE ROOF CATCHMENT PLAN

WHOLLY CRUISION FROME PRIOR A |11/01/2018) RW | RW | GENERAL AMENDMENTS CLIENT SALES PROJECT STATUS

wi -

BESPOKE BUILDING DESIGN 3 [31/01/2018| AB | RW | CONSTRUCTION DRAWINGS CONSTRUCTION DRAWINGS

DO NOT SCALE FROM THIS DRAWING C | 10/03/2018} RW | RW [RETAINING WALL ADDED. CLIENT LOCATION SCALE SHEET SIZE BCA CLASS ISSUE

FE. VeRIFY ALL DIMENSIONS PRIOR TO MACINTOSH, Douglas LOT 37 ON SP254354 INDICATED, AS la c

COMMENCEMENT OF ANY SITE WORKS DRAWING FILE NUMBER | PAGE

AND REFER ANY DISCREPANCIES TO BREWERS ROAD BI71211 6

BESPOKE BUILDING DESIGN COORAN, QLD