Conformance Criteria Of Installed ACP Cladding


Conformance Criteria Of Installed ACP Wall Cladding

  1. Performance Requirement
  2. Components and Cladding
  3. Air Infiltration ACP
  4. Water Penetration Under Static Pressure ACP
  5. Special Warranty on Panel Finishes
  6. Structural Steel Materials
  7. Weld Connections
  8. Shop Welding
  9. Source Quality Control
  10. Galvanizing
  11. Galvanizing Repair
  12. Specification of Bolts
  13. Erection of Steel Frame Runners
  14. Panel Sealants

 Performance Requirement:

ACP panel assemblies shall comply with the performance requirements without failure due to defective manufacture, fabrication, installation, or other defects in construction.

Components and ACP Cladding:

The design wind pressure for components and ACP Cladding of Buildings (Roof and Walls) shall not be less than a total net pressure of 10 lb/ft2 (0.48 kN/m2) acting in either direction common to the surface.

Air Infiltration ACP

Air leakage through the assembly of not more than 0.3 L/s per sq. m of the wall area when tested according to ASTM E 283 at the following test pressure difference: Test-pressure Difference: 75 Pa.

Water Penetration Under Static Pressure ACP: 

No water penetration when tested stated in the ASTM E 331 at the following test pressure difference: 300 Pa.

Special Warranty on Panel Finishes:

Manufacturer’s standard form in which the manufacturer agree to replace or repair parts of metal-faced composite wall panel assemblies that fail in workmanship or materials within specified warranty period.
  1. Exposed Panel Finished: Deterioration includes, but not limited to, the following:
  2. The color is fading more than five hunter unit when tested according to ASTM D 2244.
  3. Chalking more than a No. 8 rating when tested according to ASTM D 4214.
  4. Cracking,  failure, peeling or Checking of paint to adhere to bare metal.
  5. Warranty Period of Finish: 20 years from the date of substantial completion.

Structural Steel Materials

Carbon Steel: ASTM A 36m is having a minimum yield stress of 240 N/mm2 or European Standard equivalent.

Weld Connections: 

Conform with AWS D1.1 / D1.1M for appearances, tolerances, welding procedure specifications, weld quality, and methods used in correcting welding works.

Shop Welding

  1. Certify welders and conduct inspections and test required. Record locations and types of defect found in work. File work required and performed to correct deficiencies.
  2. Perform visual inspection of all welds.
  3.  Perform a non-destructive test of welds on 10% of all fillet weld length as a first testing round, depending on its results, and the engineer might instruct the contractor to extend the testing process and or to replace welder at no extra cost. Selection of tested samples to be approved by the engineer. Non-destructive test of butt welds to be done 100% of the welded lengths.
  4. Fillet welds: Liquid Penetrant Inspection: ASTM E 165 or Magnetic Particle Inspection: ASTM E 709; performed on root pass and finished weld of fillet welds at random. Cracks or zones of incomplete fusion or penetration not acceptable.
  5. Butt Welds: Radiographic Inspection-ASTM E 94 and ASTM E 142; minimum quality level 2-2T or Ultra Zonic Inspection-ASTM E 164.  

Source Quality Control

Testing Agency-Contractor will engage an independent testing and inspecting agency to perform shop test and inspection and prepare test reports.


Hot-dip galvanized finished: Apply zinc coating by the hot dip process to structural steel according to ASTM A 123 where required.

Galvanizing Repair:

Clean areas where galvanizing is missing or damaged and repair galvanizing to comply with ASTM A 780.

Specification of Bolts:

A4-70 or Galvanized - 70

Erection of Steel Frame Runners:

Set structural steel accurately in locations and o elevations indicated and according to AISC 303 and AISC 360.

Base Plates: 

Transparent concrete and masonry are bearing surfaces of bond-reducing materials, and roughen surfaces before setting plates.
  1. Fix Plates for structural members on wedges, shims or placing nuts as required.
  2. Weld plate washers to the top of the base plate.
  3. Snag-tighten anchor bolts after supported members have been positioned and plumbed. Do not remove shims or wedges but, if protruding, cut off flush with an edge of the plate before packing with grout.
  4. Immediately pack grout solidly between bearing surfaces and plates, so no voids remain. Neatly finished exposed surface, protect grout and allow the cure. Comply/Compliance with manufacturer’s written installation instructions for shrinkage-resistant grouts.

Maintain erection tolerance

Maintain erection tolerance of structural steel within AISC’s Code of Standard Practice for Steel Buildings and Bridges.

Align and adjust

Align and fit different members that form part of whole structure or frame before permanently fastening. Before assembly, clean opening surfaces and other surfaces that will be in permanent touch with members. Perform required adjustments to compensate for discrepancies in elevations and alignment.
  1. Level and plumb individual members of the structure.
  2. Make allowances for the difference between the temperature at the time of erection and mean temperature when the structure is completed in service.

 Splice members

Splice members only when indicated.

Do not use thermal cutting

Do not use thermal cutting during erection except if approved by the engineer. Finish thermally cut sections within smoothness limits in AWS D1.1

Do not enlarge unfair holes

 Do not grow unfair holes in members by using or burning drift pins. Ream holes that must be expanded to admit bolts.

Shear connectors: 

Prepare steel surfaces as recommended by the manufacturer of shear connectors. Use automatic end welding of headed stud shear connectors according to AWS D1.1/D1.1M and manufacturer’s written instructions.

Do not use welding equipment

Do not use welding equipment on the site without approval.

Ensure bolts 

Ensure bolts are in the center of slotted holes after the erection of the structure.

Treat sliding surfaces

Treat sliding surfaces of proprietary joints in agreement with manufacturer’s written instructions.

Raise or lower

Raise or lower to correct level using sawn steel packs not larger than necessary for the purpose.

Capacity of plant

Ensure that the capacity of plant and equipment used for erection are suitable and are in first class working order.

Obtain permission

Get permission before starting erection of steel work.

Inspect foundations

Check foundations before starting erection for line and level, anchor bolts for the position, protruding length, condition, and slackness.

Panel Sealants:

Joint Sealants: ASTM C 920; elastomeric polyurethane, or silicone sealant; of type, class, grade and use of classifications required to seal joints in metal-faced ACP composite wall panels and remain weather tight; and as recommended in writing by Cladding panel manufacturer.

EQ Credit 4.1

For field applications that are inside the weatherproofing system, use sealants and adhesive that standard with the subsequent limits for (VOC) content when calculated according to 40 CFR 59, Subpart D:
  1.  Architectural Sealants: 250 g/L
  2. Other Sealants: 420 g/L



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HowGear: Conformance Criteria Of Installed ACP Cladding
Conformance Criteria Of Installed ACP Cladding
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