Membrane Covered Roof Water Tanks

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CorGal tanks are available with flexible membrane covers for those applications that do not require a pitched roof and where snow loads are not a concern, however the possible reflection off the roof of the tanks is a concern.

The membrane cover tank consists of corrugated galvanized steel wall sheets with a round flexible membrane that is stretched across the top of the tank opening. The cover is pulled over the top edge of the tank wall and is secured with ropes to hooks that are bolted to the bottom of the top sheet. The membrane cover tanks are equipped with a geotextile preliner and a flexible membrane main liner for water containment.  The membrane covered tanks are pre-engineered for water containment only.

An exterior wind support ring is provided for 21′ diameter models and larger.

The membrane covers are not engineered for any specific sites nor for any live loads. These tanks should not be used in applications with high wind loads nor any snow load.

TANK ACCESS

All tanks having 2 rings (models XX02) or taller have a removable side access panel that is used for interior tank access during construction or for emergency access.

To allows access to inside the tank, the membrane cover must be unlaced and loosened at some point around the side of the tank.

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FLEXIBLE MEMBRANE COVERED TANK SIZES

TANK SPECS & DRAWINGS
ModelDiameterEave HeightGallons
0601-WT-MC6′3’8”700
0602-WT-MC6′7’3”1400
0603-WT-MC6′10’9”2200
0604-WT-MC6′14’4”2900
0605-WT-MC6′17’11”3700
0606-WT-MC6′21’5”4400
0801-WT-MC8′3’8”1200
0802-WT-MC8′7’3”2500
0803-WT-MC8′10’9”3900
0804-WT-MC8′14’4”5200
0805-WT-MC8′17’11”6500
0806-WT-MC8′21’5”7900
0901-WT-MC9′3’8”1500
0902-WT-MC9′7’3”3200
0903-WT-MC9′10’9”4900
0904-WT-MC9′14’4”6600
0905-WT-MC9′17’11”8300
0906-WT-MC9′21’5”10000
1201-WT-MC12′3’8”2700
1202-WT-MC12′7’3”5700
1203-WT-MC12′10’9”8700
1204-WT-MC12′14’4”11700
1205-WT-MC12′17’11”14700
1206-WT-MC12′21’5”17700
1501-WT-MC15′3’8”4200
1502-WT-MC15′7’3”8900
1503-WT-MC15′10’9”13500
1504-WT-MC15′14’4”18300
1505-WT-MC15′17’11”23000
1506-WT-MC15′21’5”27700
1801-WT-MC18′3’8”6000
1802-WT-MC18′7’3”13000
1803-WT-MC18′10’9”20000
1804-WT-MC18′14’4”26000
1805-WT-MC18′17’11”33000
1806-WT-MC18′21’5”40000
2101-WT-MC21′3’8”8000
2102-WT-MC21′7’3”17000
2103-WT-MC21′10’9”27000
2104-WT-MC21′14’4”36000
2105-WT-MC21′17’11”45000
2106-WT-MC21′21’5”54000
2401-WT-MC24′3’8”11000
2402-WT-MC24′7’3”23000
2403-WT-MC24′10’9”35000
2404-WT-MC24′14’4”47000
2405-WT-MC24′17’11”59000
2406-WT-MC24′21’5”71000
2701-WT-MC27′3’8”13000
2702-WT-MC27′7’3”28000
2703-WT-MC27′10’9”43000
2704-WT-MC27′14’4”58000
2705-WT-MC27′17’11”74000
2706-WT-MC27′21’5”89000
ModelDiameterEave HeightGallons
3001-WT-MC30′3’8”15000
3002-WT-MC30′7’3”34000
3003-WT-MC30′10’9”53000
3004-WT-MC30′14’4”72000
3005-WT-MC30′17’11”91000
3006-WT-MC30′21’5”109000
3301-WT-MC33′3’8”19000
3302-WT-MC33′7’3”42000
3303-WT-MC33′10’9”64000
3304-WT-MC33′14’4”87000
3305-WT-MC33′17’11”110000
3306-WT-MC33′21’5”132000
3601-WT-MC36′3’8”22000
3602-WT-MC36′7’3”49000
3603-WT-MC36′10’9”76000
3604-WT-MC36′14’4”103000
3605-WT-MC36′17’11”131000
3606-WT-MC36′21’5”157000
3901-WT-MC39′3’8”26000
3902-WT-MC39′7’3”58000
3903-WT-MC39′10’9”89000
3904-WT-MC39′14’4”121000
3905-WT-MC39′17’11”153000
3906-WT-MC39′21’5”185000
4201-WT-MC42′3’8”30000
4202-WT-MC42′7’3”67000
4203-WT-MC42′10’9”104000
4204-WT-MC42′14’4”141000
4205-WT-MC42′17’11”178000
4206-WT-MC42′21’5”214000
4801-WT-MC48′3’8”36000
4802-WT-MC48′7’3”85000
4803-WT-MC48′10’9”132000
4804-WT-MC48′14’4”180000
4805-WT-MC48′17’11”229000
4806-WT-MC48′21’5”276000
6001-WT-MC60′3’8”56000
6002-WT-MC60′7’3”132000
6003-WT-MC60′10’9”206000
6004-WT-MC60′14’4”282000
6005-WT-MC60′17’11”358000
6006-WT-MC60′21’5”432000
7201-WT-MC72′3’8”81000
7202-WT-MC72′7’3”190000
7203-WT-MC72′10’9”297000
7204-WT-MC72′14’4”406000
7205-WT-MC72′17’11”515000
7206-WT-MC72′21’5”622000
75XX-WT-MC75′3’8” – 21’5”–
82XX-WT-MC82′3’8” – 21’5”–
85XX-WT-MC85′3’8” – 21’5”–
90XX-WT-MC90′3’8” – 21’5”–
105XX-WT-MC105′3’8” – 21’5”–
All capacities are rounded.  Actual tank capacities will vary due to location of flanges and structural design.