The main distinction is between cast-in anchor bolts and post-installed anchors. Cast-in bolts are positioned before the concrete is poured and suit planned structural connections, while mechanical or chemical anchors are installed after the base has cured and can be useful for retrofit work or established slabs.
Substrate condition also changes the decision. A solid, sound concrete base may support a different anchor design from cracked concrete, hollow masonry or concrete near an edge. Confirm the required load, spacing, embedment and installation method with the project engineer or anchor-system documentation before ordering.
Start with the connection. Specify whether the anchor fastener will resist tension, shear, vibration or a combination of loads. A baseplate, guardrail, machinery frame and façade support can place different demands on the same concrete surface. Provide the fixture drawing, hole pattern and load information instead of requesting an anchor from a nominal bolt diameter alone.
Match the substrate and installation stage. Identify concrete strength and condition where known, or state if the fixing is for masonry, a cracked slab, a new pour or an existing structure. Cast-in bolts require accurate positioning before pouring; post-installed anchors require compatible drilling, cleaning and installation procedures. Do not replace one anchor family with another simply because the thread appears similar.
Review material and protection. Indoor dry applications may allow a different material or finish from outdoor, wet, coastal or chemically exposed locations. Check the required corrosion resistance, nut and washer compatibility, thread condition and any project standard. For critical connections, ask how the proposed anchor system is assessed for the actual substrate and load case.
Prevent ordering errors. Confirm thread form, overall length, unthreaded length, head or bend configuration, washer and nut requirements, quantity and packing identification. Send the drawing, application, substrate, finish requirement and delivery destination to Hebei Wotu Fastener Manufacturing Co., Ltd., and ask which dimensions and inspection documents can be supplied for the proposed anchor fastener.
