RECTANGULAR STRUCTURAL TUBE - Manxa Ferros
Home > >RECTANGULAR STRUCTURAL TUBE

RECTANGULAR STRUCTURAL TUBE   (3048) products

THICKNESS
WIDTH
HEIGHT
  • 11174
    11174
    RECTANGULAR TUBE 400X300X8X12000 S-355

    Manxa code: 11174
    QUALITY: S355
    UAHE Weight: 89.559 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:400 x 300 x 8mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 8
    WIDTH : 400


    Quantity UN


    Budgeting
  • 11175
    11175
    RECTANGULAR TUBE 400X300X10X12000 S-355

    Manxa code: 11175
    QUALITY: S355
    UAHE Weight: 108.23 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:400 x 300 x 10mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 10
    WIDTH : 400


    Quantity UN


    Budgeting
  • 11176
    11176
    RECTANGULAR TUBE 400X300X12X12000 S-355

    Manxa code: 11176
    QUALITY: S355
    UAHE Weight: 127.41 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:400 x 300 x 12mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 12
    WIDTH : 400


    Quantity UN


    Budgeting
  • 11177
    11177
    RECTANGULAR TUBE 400X300X14,2X12000 S355

    Manxa code: 11177
    QUALITY: S355
    UAHE Weight: 148.65 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:400 x 300 x 14.2mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 14.2
    WIDTH : 400


    Quantity UN


    Budgeting
  • 11178
    11178
    RECTANGULAR TUBE 400X300X16X12100 S-355

    Manxa code: 11178
    QUALITY: S355
    UAHE Weight: 165.55 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:400 x 300 x 16mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 16
    WIDTH : 400


    Quantity UN


    Budgeting
  • 11179
    11179
    RECTANGULAR TUBE 450X250X6X12000 S-355

    Manxa code: 11179
    QUALITY: S355
    UAHE Weight: 66.646 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:450 x 250 x 6mm.
    ATTRIBUTES
    HEIGHT : 250
    THICKNESS : 6
    WIDTH : 450


    Quantity UN


    Budgeting
  • 11180
    11180
    RECTANGULAR TUBE 450X250X8X12000 S-355

    Manxa code: 11180
    QUALITY: S355
    UAHE Weight: 89.559 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:450 x 250 x 8mm.
    ATTRIBUTES
    HEIGHT : 250
    THICKNESS : 8
    WIDTH : 450


    Quantity UN


    Budgeting
  • 11181
    11181
    RECTANGULAR TUBE 450X250X10X12000 S-355

    Manxa code: 11181
    QUALITY: S355
    UAHE Weight: 108.23 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:450 x 250 x 10mm.
    ATTRIBUTES
    HEIGHT : 250
    THICKNESS : 10
    WIDTH : 450


    Quantity UN


    Budgeting
  • 11183
    11183
    RECTANGULAR TUBE 450X250X12X12000 S-355

    Manxa code: 11183
    QUALITY: S355
    UAHE Weight: 127.41 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:450 x 250 x 12mm.
    ATTRIBUTES
    HEIGHT : 250
    THICKNESS : 12
    WIDTH : 450


    Quantity UN


    Budgeting
  • 11184
    11184
    RECTANGULAR TUBE 450X250X14,2X12000 S355

    Manxa code: 11184
    QUALITY: S355
    UAHE Weight: 148.65 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:450 x 250 x 14.2mm.
    ATTRIBUTES
    HEIGHT : 250
    THICKNESS : 14.2
    WIDTH : 450


    Quantity UN


    Budgeting
  • 11185
    11185
    RECTANGULAR TUBE 450X250X16X12000 S-355

    Manxa code: 11185
    QUALITY: S355
    UAHE Weight: 165.55 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:450 x 250 x 16mm.
    ATTRIBUTES
    HEIGHT : 250
    THICKNESS : 16
    WIDTH : 450


    Quantity UN


    Budgeting
  • 11186
    11186
    RECTANGULAR TUBE 500X200X6X12000 S-355

    Manxa code: 11186
    QUALITY: S355
    UAHE Weight: 66.646 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:500 x 200 x 6mm.
    ATTRIBUTES
    HEIGHT : 200
    THICKNESS : 6
    WIDTH : 500


    Quantity UN


    Budgeting
  • 11187
    11187
    RECTANGULAR TUBE 500X200X8X12000 S-355

    Manxa code: 11187
    QUALITY: S355
    UAHE Weight: 89.559 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:500 x 200 x 8mm.
    ATTRIBUTES
    HEIGHT : 200
    THICKNESS : 8
    WIDTH : 500


    Quantity UN


    Budgeting
  • 11188
    11188
    RECTANGULAR TUBE 500X200X10X12000 S-355

    Manxa code: 11188
    QUALITY: S355
    UAHE Weight: 108.23 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:500 x 200 x 10mm.
    ATTRIBUTES
    HEIGHT : 200
    THICKNESS : 10
    WIDTH : 500


    Quantity UN


    Budgeting
  • 11189
    11189
    RECTANGULAR TUBE 500X200X12X12000 S-355

    Manxa code: 11189
    QUALITY: S355
    UAHE Weight: 127.41 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:500 x 200 x 12mm.
    ATTRIBUTES
    HEIGHT : 200
    THICKNESS : 12
    WIDTH : 500


    Quantity UN


    Budgeting
  • 11190
    11190
    RECTANGULAR TUBE 500X200X14,2X12000 S355

    Manxa code: 11190
    QUALITY: S355
    UAHE Weight: 148.65 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:500 x 200 x 14.2mm.
    ATTRIBUTES
    HEIGHT : 200
    THICKNESS : 14.2
    WIDTH : 500


    Quantity UN


    Budgeting
  • 11191
    11191
    RECTANGULAR TUBE 500X300X8X12000 S-355

    Manxa code: 11191
    QUALITY: S355
    UAHE Weight: 102.93 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:500 x 300 x 8mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 8
    WIDTH : 500


    Quantity UN


    Budgeting
  • 11192
    11192
    RECTANGULAR TUBE 500X300X10X12000 S-355

    Manxa code: 11192
    QUALITY: S355
    UAHE Weight: 124.56 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:500 x 300 x 10mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 10
    WIDTH : 500


    Quantity UN


    Budgeting
  • 11193
    11193
    RECTANGULAR TUBE 500X300X12X12000 S-355

    Manxa code: 11193
    QUALITY: S355
    UAHE Weight: 147.01 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:500 x 300 x 12mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 12
    WIDTH : 500


    Quantity UN


    Budgeting
  • 11194
    11194
    RECTANGULAR TUBE 500X300X12,5X12000 S355

    Manxa code: 11194
    QUALITY: S355
    UAHE Weight: 152.71 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:500 x 300 x 12.5mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 12.5
    WIDTH : 500


    Quantity UN


    Budgeting
  • 11195
    11195
    RECTANGULAR TUBE 500X300X14,2X12000 S355

    Manxa code: 11195
    QUALITY: S355
    UAHE Weight: 171.84 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:500 x 300 x 14.2mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 14.2
    WIDTH : 500


    Quantity UN


    Budgeting
  • 11196
    11196
    RECTANGULAR TUBE 500X300X16X12000 S-355

    Manxa code: 11196
    QUALITY: S355
    UAHE Weight: 191.67 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:500 x 300 x 16mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 16
    WIDTH : 500


    Quantity UN


    Budgeting
  • 17626
    17626
    RECTANGULAR TUBE 300X100X6X10000 S275J0H

    Manxa code: 17626
    QUALITY: S275
    UAHE Weight: 37.23 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:300 x 100 x 6mm.
    ATTRIBUTES
    HEIGHT : 100
    THICKNESS : 6
    WIDTH : 300


    Quantity UN


    Budgeting
  • 17781
    17781
    RECTANGULAR TUBE 350X250X12,5X12000 S355

    Manxa code: 17781
    QUALITY: DX51D+Z
    UAHE Weight: 107.82 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:350 x 250 x 12.5mm.
    ATTRIBUTES
    HEIGHT : 250
    THICKNESS : 12.5
    WIDTH : 350


    Quantity UN


    Budgeting
  • 17812
    17812
    RECTANGULAR TUBE 40X27X3 S235JRH

    Manxa code: 17812
    QUALITY: S235JR
    UAHE Weight: 2.8 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:40 x 27 x 3mm.
    ATTRIBUTES
    HEIGHT : 27
    THICKNESS : 3
    WIDTH : 40


    Quantity UN


    Budgeting
  • 17836
    17836
    RECTANGULAR TUBE 400X200X12,5 S-355

    Manxa code: 17836
    QUALITY: S235JR
    UAHE Weight: 117 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:400 x 200 x 12.5mm.
    ATTRIBUTES
    HEIGHT : 200
    THICKNESS : 12.5
    WIDTH : 400


    Quantity UN


    Budgeting
  • 17857
    17857
    RECTANGULAR TUBE 250X150X5X15000 S275J0H

    Manxa code: 17857
    QUALITY: DX51D+Z
    UAHE Weight: 31.3 KG/M
    CERTIFIED STANDARD: UNE EN 10304
    MATERIAL REGULATION: UNE EN 10219
    SIZE:250 x 150 x 5mm.
    ATTRIBUTES
    HEIGHT : 150
    THICKNESS : 5
    WIDTH : 250


    Quantity UN


    Budgeting
  • 17863
    17863
    RECTANGULAR TUBE 250X150X5X15000 S275J0H

    Manxa code: 17863
    QUALITY: S235JR
    UAHE Weight: 31.3 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:250 x 150 x 5mm.
    ATTRIBUTES
    HEIGHT : 150
    THICKNESS : 5
    WIDTH : 250


    Quantity UN


    Budgeting
  • 17949
    17949
    RECTANGULAR TUBE 80X60X5X15000 S-355

    Manxa code: 17949
    QUALITY: S355
    UAHE Weight: 10.09 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:80 x 60 x 5mm.
    ATTRIBUTES
    HEIGHT : 60
    THICKNESS : 5
    WIDTH : 80


    Quantity UN


    Budgeting
  • 17963
    17963
    RECTANGULAR TUBE 80X50X

    Manxa code: 17963
    QUALITY: S235JR
    UAHE Weight: 13.104 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:80 x 50 x 8mm.
    ATTRIBUTES
    HEIGHT : 50
    THICKNESS : 8
    WIDTH : 80


    Quantity UN


    Budgeting
  • 17980
    17980
    SQUARE TUBE 100X100X3X15000 S-275

    Manxa code: 17980
    QUALITY: S235JR
    UAHE Weight: 9.32 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:100 x 100 x 3mm.
    ATTRIBUTES
    HEIGHT : 100
    THICKNESS : 3
    WIDTH : 100


    Quantity UN


    Budgeting
  • 17989
    17989
    RECTANGULAR TUBE 150X100X12,5 S355

    Manxa code: 17989
    QUALITY: S355
    UAHE Weight: 45.58 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:150 x 100 x 12.5mm.
    ATTRIBUTES
    HEIGHT : 100
    THICKNESS : 12.5
    WIDTH : 150


    Quantity UN


    Budgeting
  • 17994
    17994
    RECTANGULAR TUBE 100X50X8 S355

    Manxa code: 17994
    QUALITY: S275
    UAHE Weight: 16.952 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:100 x 50 x 8mm.
    ATTRIBUTES
    HEIGHT : 50
    THICKNESS : 8
    WIDTH : 100


    Quantity UN


    Budgeting
  • 18025
    18025
    RECTANGULAR TUBE 110X70X3 S235JRH

    Manxa code: 18025
    QUALITY: B500T
    UAHE Weight: 8.33 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:110 x 70 x 3mm.
    ATTRIBUTES
    HEIGHT : 70
    THICKNESS : 3
    WIDTH : 110


    Quantity UN


    Budgeting
  • 18231
    18231
    RECTANGULAR TUBE 120X60X10X12000 S355

    Manxa code: 18231
    QUALITY: S355
    UAHE Weight: 23.296 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:120 x 60 x 10mm.
    ATTRIBUTES
    HEIGHT : 60
    THICKNESS : 10
    WIDTH : 120


    Quantity UN


    Budgeting
  • 18310
    18310
    RECTANGULAR TUBE 120X60X3 S275J0H X 9000

    Manxa code: 18310
    QUALITY: S275
    UAHE Weight: 8.33 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:120 x 60 x 3mm.
    ATTRIBUTES
    HEIGHT : 60
    THICKNESS : 3
    WIDTH : 120


    Quantity UN


    Budgeting
  • 18311
    18311
    RECTANGULAR TUBE 200X100X3 S275JOH X9000

    Manxa code: 18311
    QUALITY: S275
    UAHE Weight: 14.25 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:200 x 100 x 3mm.
    ATTRIBUTES
    HEIGHT : 100
    THICKNESS : 3
    WIDTH : 200


    Quantity UN


    Budgeting
  • 18335
    18335
    RECTANGULAR TUBE 100X50X8X12000 S355

    Manxa code: 18335
    QUALITY: S355
    UAHE Weight: 16.952 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:100 x 50 x 8mm.
    ATTRIBUTES
    HEIGHT : 50
    THICKNESS : 8
    WIDTH : 100


    Quantity UN


    Budgeting
  • 18339
    18339
    RECTANGULAR TUBE 180X100X4X11000 S275J0H

    Manxa code: 18339
    QUALITY: S275
    UAHE Weight: 17.47 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:180 x 100 x 4mm.
    ATTRIBUTES
    HEIGHT : 100
    THICKNESS : 4
    WIDTH : 180


    Quantity UN


    Budgeting
  • 18351
    18351
    RECTANGULAR TUBE 400X300X10X8000 S-355

    Manxa code: 18351
    QUALITY: DX51D+Z
    UAHE Weight: 108.23 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:400 x 300 x 10mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 10
    WIDTH : 400


    Quantity UN


    Budgeting
  • 18353
    18353
    RECTANGULAR TUBE 400X300X16X8000 S-355

    Manxa code: 18353
    QUALITY: S355
    UAHE Weight: 165.55 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:400 x 300 x 16mm.
    ATTRIBUTES
    HEIGHT : 300
    THICKNESS : 16
    WIDTH : 400


    Quantity UN


    Budgeting
  • 18421
    18421
    RECTANGULAR TUBE 80X60X8X12000 S-355

    Manxa code: 18421
    QUALITY: PANELLS PER TANCATS
    UAHE Weight: 14.214 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:80 x 60 x 8mm.
    ATTRIBUTES
    HEIGHT : 60
    THICKNESS : 8
    WIDTH : 80


    Quantity UN


    Budgeting
  • 18540
    18540
    RECTANGULAR TUBE 200X100X3X7000 S275J0H

    Manxa code: 18540
    QUALITY: B500T
    UAHE Weight: 14.25 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:200 x 100 x 3mm.
    ATTRIBUTES
    HEIGHT : 100
    THICKNESS : 3
    WIDTH : 200


    Quantity UN


    Budgeting
  • 18561
    18561
    SQUARE TUBE 350X350X6,3X10000 S355

    Manxa code: 18561
    QUALITY: S355
    UAHE Weight: 66.646 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:350 x 350 x 6mm.
    ATTRIBUTES
    HEIGHT : 350
    THICKNESS : 6
    WIDTH : 350


    Quantity UN


    Budgeting
  • 18795
    18795
    RECTANGULAR TUBE 200X150X4X8000 S235JRH

    Manxa code: 18795
    QUALITY: S235JR
    UAHE Weight: 22.05 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:200 x 150 x 4mm.
    ATTRIBUTES
    HEIGHT : 150
    THICKNESS : 4
    WIDTH : 200


    Quantity UN


    Budgeting
  • 18796
    18796
    RECT. TUBE 70X40X4 ELECTROGALVANIZED

    Manxa code: 18796
    QUALITY: S275
    UAHE Weight: 6.32 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:70 x 40 x 4mm.
    ATTRIBUTES
    HEIGHT : 40
    THICKNESS : 4
    WIDTH : 70


    Quantity UN


    Budgeting
  • 18967
    18967
    RECTANGULAR TUBE 500X200X16X12000 S355

    Manxa code: 18967
    QUALITY: S355
    UAHE Weight: 165.36 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:500 x 200 x 16mm.
    ATTRIBUTES
    HEIGHT : 200
    THICKNESS : 16
    WIDTH : 500


    Quantity UN


    Budgeting
  • 24153
    24153
    RECTANGULAR TUBE 200X100X8 S275J0H

    Manxa code: 24153
    QUALITY: S235JR
    UAHE Weight: 36.4 KG/M
    CERTIFIED STANDARD: UNE-EN 10204/3.1
    MATERIAL REGULATION: UNE-EN 10219-2=2
    SIZE:200 x 100 x 8mm.
    ATTRIBUTES
    HEIGHT : 100
    THICKNESS : 8
    WIDTH : 200


    Quantity UN


    Budgeting
Showing 3001 - 3048 of 3048 items
We deliver it with zero emissions When you buy from Manxa, you are participating in all these social projects