Component inspection outline before installing security camera poles
To ensure the quality, safety, and long-term stable operation of the security camera poles installation project, incoming components must be strictly and systematically inspected before installation and construction. This outline aims to provide comprehensive and detailed inspection guidance.
I. Inspection of foundation and embedded parts
Inspection of foundation quality documents:
Inspect foundation construction records and concrete strength test reports (to ensure that the design strength requirements are met, usually ≥C25 or design requirements).
Inspect foundation maintenance records (whether they meet the requirements of the specifications).
Inspect foundation acceptance certificate documents.
Review of foundation dimensions and position:
Use total station, steel tape measure, and other tools to accurately measure the elevation of the foundation top surface to ensure that it meets the design requirements (allowable deviation ±5mm).
Measure the coordinates of the foundation center point (or the position relative to the reference point) to ensure that it is consistent with the design drawings (allowable deviation ≤10mm).
Inspect the flatness of the foundation top surface (check with a level or level, flatness deviation ≤3mm/m).
Measure the foundation dimensions (length and width) and the dimensions and spacing of the reserved holes for anchor bolts (or flange mounting surface), and check whether they meet the design drawings (allowable deviation of bolt spacing ±2mm).
Embedded parts (anchor bolts/flanges) inspection:
Material and specifications: Check the material certification documents (usually Q235B or Q355B, etc.), visually observe the surface quality (no severe rust, cracks, or deformation), measure the diameter, length, thread length, and pitch, and check whether it is consistent with the design.
Position and verticality: Use a steel tape measure to check the center position, relative spacing, and diagonal distance of the bolt group (or flange mounting hole) (allowable deviation ±2mm). Use a magnetic plumb bob or theodolite to check the verticality of the bolt (or flange) (allowable deviation ≤1/500).
Exposed length and protection: Measure the exposed thread length of the anchor bolt (must meet the design requirements, usually considering nuts + gaskets + adjustment margins), check whether the thread is intact and undamaged, without severe rust, and check whether temporary protection measures (such as butter wrapping) are in place. Flanges check the flatness of the mounting surface and the integrity of the anti-corrosion layer.
Anchoring depth: Check the construction records or conduct random inspections when necessary to ensure that the bolt anchoring depth meets the design requirements (usually ≥ 25 times the bolt diameter).
II. Inspection of rod components
Rod body (main rod, cantilever/cross arm):
Material certification: Check the quality certificate (warranty certificate) of steel (usually Q235B, Q355B), and check the brand, specification, furnace batch number, etc.
Specifications and dimensions: Use a steel tape measure, caliper, etc. to measure the length, diameter (or cross-sectional dimensions), and wall thickness of each section of the rod (pay special attention to key parts such as flange connection, diameter change, and cantilever root), and check whether it meets the design drawings (the negative tolerance of wall thickness must be within the allowable range of the specification).
Appearance quality:
Visually check whether the surface of the rod is straight and there is no visible bending, twisting, or deformation.
Check whether the weld is full, continuous, and smooth, and there are no obvious defects such as undercut, incomplete penetration, pores, slag inclusions, and cracks. Focus on checking the key parts such as flange butt welds, cantilever and main rod connection welds, and stiffener plate welds.
Check the anti-corrosion layer on the rod surface (hot-dip galvanizing is the most common):
Color: uniform silver-white or gray.
Surface: smooth, continuous, no leakage, no sagging, no dripping, no nodules, no sharp points (soft to the touch).
Thickness: Use a magnetic thickness gauge to measure multiple points (rod body, flange, connector, interior, etc.) to ensure that the average thickness and local minimum value meet the GB/T 13912 standard (such as rod ≥85μm, fastener ≥50μm) or design requirements. Pay special attention to weak areas such as welds, edges and corners, and inner walls.
Adhesion: Use a hard-edged tool (such as a blade) to cross-cut in non-critical areas (about 1mm intervals), and the coating should not peel or peel off.
Check whether the rod surface has any damage such as bumps, scratches, or deformation caused by transportation and hoisting, and whether the anti-corrosion layer at the damaged part is intact or has been repaired as required.
Internal inspection (if applicable): For tapered rods or closed rods, check the internal anti-corrosion layer (hot-dip galvanized rods need to check the quality of the inner wall galvanizing, and plastic-sprayed rods need to confirm that the inner wall has been treated), whether there are water holes (the position, size, and number are in line with the design and there is no blockage).
Flange (end of the rod):
Check the material, thickness, outer diameter, number of bolt holes, hole diameter, hole spacing (center distance and diagonal distance) of the flange, and check the design drawings (allowable deviation ±1mm).
Check the flatness of the flange (place it on the platform or use a ruler and feeler gauge to check, if the flatness deviation is ≤0.5mm/100mm).
Check the welding quality of the flange and the rod (the weld is full and defect-free) and verticality.
Check the quality of the anti-corrosion layer of the flange (same as the rod).
Ladder/operating platform (if designed):
Check the material, specification, installation position, and firmness of the ladder pedal (anti-slip design), handrail, and guard cage (if any).
Check the connection method (welding or bolts) and strength between the ladder and the pole body, and the welding quality meets the requirements.
Check the quality of the anti-corrosion layer of the ladder and platform (same as the pole body).
Grounding terminal/flat steel:
Check whether the preset grounding terminal position on the pole body is correct and marked.
Check the material (usually stainless steel or hot-dip galvanized steel), specification, and connection bolts of the grounding terminal are intact.
Check the material (hot-dip galvanized flat steel), specification (such as 40x4mm), length, welding quality, and anti-corrosion of the pre-welded grounding flat steel (if any).
III. Inspection of accessory components
Fasteners (bolts, nuts, washers):
Material and grade: Check the quality certification documents, and verify whether the material (usually Q235, 8.8 grade, or higher strength grade) and specifications (diameter, length, pitch) meet the design requirements (high-strength bolts need to be specially noted).
Quantity: Check whether the matching quantity is sufficient, and store them by specification.
Appearance and anti-corrosion: Check whether the thread is clear, undamaged, and rust-free (hot-dip galvanized bolts have an intact zinc layer, and the Dacromet coating is uniform). Check whether the gasket specifications and types (flat washers, spring washers) are correct.
Lightning rod (if designed):
Check the material of the lightning rod (usually stainless steel or hot-dip galvanized steel), specifications (diameter, length), and needle tip condition (sharp and undamaged).
Check the connection method and firmness with the rod body (welded or bolted, the welding must be full and defect-free).
Check the quality of the anti-corrosion layer (for stainless steel, check the passivation layer, and for hot-dip galvanizing, check the coating).
Equipment installation bracket/clamp:
Check whether the material, specification, size, opening position, and aperture of the bracket/clamp meet the installation requirements of cameras, fill lights, and other equipment.
Check the quality of surface anti-corrosion treatment (hot-dip galvanizing or plastic spraying).
Check whether the adjustment mechanism (if any) is flexible and reliable.
Cable lead-in pipe/waterproof joint:
Check whether the preset cable lead-in pipe material (PVC or galvanized steel pipe), pipe diameter, length, and bending radius meet the design requirements.
Check whether the lead-in pipe port treatment (whether it is smooth and burr-free) and temporary plugging are intact.
Check whether the specifications and quantity of the waterproof joint (cable gland) match and whether the packaging is intact.
IV. Document inspection
Check whether the factory certificate, quality certificate (material list), and third-party inspection report (such as galvanized layer thickness inspection report, weld non-destructive inspection report, etc.) of all incoming components are complete and valid.
Check whether the component delivery list is consistent with the actual quantity, specifications, and models.
Check whether the technical documents such as design drawings and change negotiation records are complete, up-to-date, and valid.
V. Site adaptability and safety preparation inspection
Component assembly rehearsal: Pre-assemble the main components such as the main pole, cantilever, flange, etc. on the ground (if conditions permit), check whether the connection is smooth, whether the bolt holes are aligned, and whether the flange fits tightly.
Lifting point inspection: Confirm that the lifting points (lifting ears) designed on the pole body are reasonably located, welded firmly, and undamaged, and meet the requirements for safe lifting.
Site environment review: Confirm that the site around the foundation meets the space requirements for crane operation and component placement and that underground pipelines and aerial obstacles (such as high-voltage lines) have been avoided or safety measures have been taken.
Safety measures: Check whether the lifting rigging (wire rope, shackle) has a certificate of conformity and is undamaged; check whether the on-site safety fences, warning signs, and personnel safety protection equipment (safety helmets, safety belts, etc.) are in place.
Inspection records and handling
Detailed records: Check each inspection item one by one, and record the inspection results (qualified/unqualified), measured data, problems found (location, description, photos), inspectors, and dates.
Handling of unqualified: Components that fail the inspection must be marked (such as unqualified labels), isolated, and stored, and the supplier/manufacturer must be notified in writing immediately, with clear requirements for return, exchange, or repair. Unqualified components are strictly prohibited from being used for installation.
Signature confirmation: The complete inspection record must be signed and confirmed by the construction party (installation unit) and the supervision party (if any) and archived as engineering data.