TOE Statement

<user_name>

Freely selectable user toe name (string not longer than 8 characters).

TYPE

Basic toe type. Compulsory. Must be picked from the ones available in the document, referred to above.

TOE_H

Toe height (parameter TOE_H). Compulsory for toe types 1, 2, 3, 4, 8, 9, 13, 21, 32, 33, 34, 35, 36, 37, 102, 131, 132, 133, 134, 135, 136. (For some toe types (11, 12, 14) the toe height is normally calculated by the application. If not calculated the given value is a default height to be used, for example, when the brackets is attached to an (unrestricted) plate surface).

In certain cases given an negative value makes sense. For toe types 13 and 15 a TOE_H<O means that the toe height will be calculated as H_TOT -ABS(TOE_H). This can for example, be used to create a toe with a notch (type KS/ a the upper corner.

H_TOT

Total toe height. To be defined for toe types 13, 15.

Normally to be calculated by the application for toe types 31, 32, 33, 34, 35, 36, 131, 132, 133, 134, 135, 136.

Otherwise irrelevant.

O_LAP

Overlap at (normally perpendicular to) the profile edge. The overlap may be dependent on the bracket thickness (see O_LAP_LIM below). At most three values can be given.

Compulsory for toe types 2, 4, 9, 31, 32, 33, 34, 35, 36, 102, 131, 132, 133, 134, 135, 136.

O_LAP = -1 has for the toe types 33 and 133 the meaning that the overlap should be set equal to the profile height minus the radius at the lug, cf. the figure below.

Irrelevant otherwise.

Figure 5:1. Toe type 33 with O_LAP=-1.

O_LAP_LIM

Defines the limit bracket thickness, controlling the size of overlap. The number of assigned values must be exactly one less than the value assigned to O_LAP.

Attribute O_LAP_LIM must be given after attribute O_LAP.

(If the bracket thickness (T)< <lim1>, then the overlap is <lap1>, else if T< <lim2> then the overlap is <lap2>, else <lap3>)

R_ANG

Angle controlling the tangent direction of the arc (or line segment) following the toe height segment in certain toe types.

Compulsory for toe types 3, 4, 13, 15.

For toe types 8 and 9 the angle is relevant only if the bracket is symmetric (bracket arms of equal length) or if the radius of the free side is not defined by the user at run time.

TOE_L

Length of toe along edge. The toe length may be dependent on length of the bracket arm (see TOE_L_LIM below). At most three values can be given.

Must be given for toe types 3 and 4. (May be overridden by user input). (Must be calculated by the application for toe types 12, 13, 14).

Irrelevant otherwise.

= -1 means that the toe length should be calculated by projection of TOE_H (or H_TOT) of the opposite toe on the current arm, for example, when combined with a connection of type 7. See figure below, showing a toe of type 3 the length of which is calculated by projection of the other toe.

Figure 5:2. Toe length by projection of opposite toe height.

0< |TOE_L| < 1 means that the toe length should be interpreted as a factor and that the actual toe length is calculated as TOE_L*LEN where LEN is the length of the bracket arm.

> 0: Calculate using length of current arm.

< 0: Use length of the opposite arm.

TOE_L_LIM

Defines the limit size, controlling the toe length. The number of assigned values must be exactly one less than the values assigned to TOE_L.

Attribute TOE_L_LIM must be given after attribute TOE_L.

(If the arm length (L)< <lim1>, then the toe length is <len1>, else if L< <lim2> then the toe length is <len2>, else <len3>).

RAD

(=R_TOE) Radius associated with certain toe types (8, 9, (11,) 12, 13, 14). This radius may often be changed or given directly by the end user.

= -1 Means that the radius must be given via input at run time.

< -1 May in certain cases be relevant and used to indicate an amplitude instead of a radius, for example, in a situation like the one below where two toes of type 8 are connected to form the free edge of three-edged bracket (the left figure below). In a similar situation a toe type 11 (which otherwise is not supposed to be combined with a radius) can be assigned a radius, both in the TOE statement and as user input in the generation phase (the right figure below).

Figure 5:3. Options for definition of radius of free side.

R_CORN

Fillet radius at the corner of certain bracket toes. Compulsory for toe type 102.

Optional for the following toe types: 131, 132, 133, 134, 135, 136 (if not given for these toe types the radius will be calculated from H_TOT, TOE_H and O_LAP, resulting in the "variants" of these toe types).

R_LUG

Radius of lug of certain toe (arm) types. Compulsory for the toe types 33, 34, 133, 134, otherwise irrelevant.

KNUCKLE_PT

A stand-alone keyword. Normally the toe length of a toe of type 14 is calculated to the start of the arc of the toe.

However, if this keyword is given the distance is measured to the knuckle point between the two line segments for which the arc is a fillet. See figure below.

Figure 5:4. Options for calculating toe length.