HILTI ANCHOR CHANNEL

Face of Slab Questionnaire

PROFIS Anchor Channel Software
Concrete strength: The compressive strength of the concrete. Typically the concrete strength is 4,000 psi or 5,000 psi.

Concrete: refers to whether the concrete is considered cracked or un-cracked. We will assume cracked concrete unless otherwise stated.

Slab thickness: The thickness of the concrete slab.


Straight edge reinforcement – anchor channel in cracked concrete with straight edge reinforcement with 12mm (1/2”) diameter (or larger) reinforcement. Straight edge reinforcement – anchor channel in cracked concrete with straight edge reinforcement with 12mm (1/2”) diameter (or larger) reinforcement.
Reinforcement with stirrups – anchor channel in cracked concrete with edge reinforcement and stirrups with a spacing a <= 100mm (4”) and a <= 2 * c1. Reinforcement with stirrups – anchor channel in cracked concrete with edge reinforcement and stirrups with a spacing a <= 100mm (4”) and a <= 2 * c1.
Type of loads: Anchor channels are designed using LRFD (Load and Resistance Factor Design) where factors are applied to the service loads and then compared to the factored material strengths. If services loads are given, factors of 1.2D (dead load) and 1.6L (live load) will be applied.

Vertical load: The load caused by gravity in the bottom of slab application

Horizontal load: The load caused by the wind load or suction load in the bottom of the slab application

Longitudinal load:
Shear loads in the direction parallel to the anchor channel (caused by wind or seismic).

Load spacing:
The distance between bolts that connect to the curtain wall bracket. Default assumption is for two bolts per anchor channel (load pair).

Load eccentricities: The distance between the load point of the bracket to the slab edge (vertical load eccentricity) and the distance from the center plane of the anchor channel to the load point on the bracket (horizontal load eccentricity).

Edge distances: The distance from the center of the anchor channel to the edge of the concrete slab (both top and bottom distances).

Installation tolerance
: Refers to the difference between length of the channel compared to the width of the bracket (e.g. the channel has 300mm length, the bracket has 250mm width, leaving a tolerance of 50mm for shifting the position of the bracket).
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