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Modelling Frames

From DT Online

EB1911 Carpentry Fig. 34 - Half Timber Construction

Lengths of Stripwood can be joined together by gluing card triangular Gussets over each joint. Typically these are glued each side of a Butt Joint or in-between an over-lapping joint.


Complex frames (e.g. for bridges, roof trusses or timber framed buildings) can be drawn out full-size and the frames assembled over the drawing.



Material Preparation
Making Card Triangles These are cut out from medium card, and are used as Gussets to join together pieces of Stripwood by brushing on PVA glue. A useful size is 30mm x 30mm which can most easily be marked out using the width of a wooden ruler as a guide.
CardTriangles.png
Cutting Stripwood Thin strips of Softwood or Jelutong, most commonly 8mm square but also 10mm and 12mm square, provide an easy to cut and glue material for modelling (e.g. using a Junior Hacksaw and PVA).


A small Clamp-on Vice holds the work-piece firmly whilst it is sawn. Older children may be able to hold Stripwood firmly enough against a small Bench Hook as they saw it to length.

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2D Frames
Basic Frame Construction Squared paper or graph paper can be used to mark out simple rectangluar frames (e.g. for a vehicle chassis) and used to mark out and cut pieces of Stripwood to length.


Lay the pieces over the drawn rectangle and glue Card Triangles over each joint to reinforce it. Turn the frame over and do the same on the other side.


At each stage, you may wish to add small weights on each joint to keep the frame still and keep the triangles in place as the glue dries.

MakingStripwoodFrame.png
Setting Out Frames More complex frames are built in the same way and can be started by making a full-size drawing. Once again, using squared paper or graph paper will help to keep the drawing accurate. Alternatively, the design can be produced on a computer using CAD software then printed out.


Covering the drawing with tracing paper or greaseproof paper will help stop glue sticking to it - alternatively, rub soap or wax on to the drawing around each joint location.

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3D Frames
Assembling 2D Frames Always try to think of 3D, box-like structures as a series of flat frames joined together and make these first.


It is almost impossible to build a 3D structure all in one go - everything wobbles about too much! Use spring-type Clothes Pegs or Bulldog Clips, for example, to hold frames together until the glue dries.

HouseFrame2.png
Timber Framed House This technique is ideal for modelling buildings and similar structures - especially traditional Timber Framed Buildings.


The use of Dragon Beams can be modelled and upper storeys made to project over the ground floor to create Jetties. These increased space in the upper floors and provided some shelter to the lower walls.


Note: When the Great Fire of London started at the Pudding Lane bakery of Thomas Farriner 2nd September 1666, one of the reasons the fire spread so quickly was the closeness of the wooden Jetties to those of the buildings opposite. As a consequence they were banned in London after the Great Fire


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Old Wool Hall in Levenham, Suffolk [[Lavenham - Old Wool Hall HouseFrame4.png


DT Online Buyers' Guide

Safety Point! Take great care with hot glue guns and all hot-melt glues. The melted glue can stick to the skin and cause severe burns.


Stanley Junior Hacksaw 0 15 218 Draper 14145 55 mm Clamp-On Hobby Bench Vice 5 x Richard Burbidge Decorative Wood Stripwood - Pine - 900 x 8 x 8mm Balsa Wood - Giant Pack House of Card & Paper A4 220 gsm Card - Assorted Bright (Pack of 100 Sheets) 100 sheets coloured card mix A4 300gsm thick card Am-Tech A3 Cutting Mat Chartwell A3 Orange Student Graph Pad 50 Sheets (1, 5 & 10mm Grid Paper) J13B 4 PVA Glue Washable Adhesive School Home Crafts Non Toxic Wood Paper Fabric Art Bosch PKP 18 E Glue Gun Strong Heavy Duty Professional Bamboo Plant Support Garden Canes | 2ft - 10ft
Stanley Junior Hacksaw 0 15 218 Draper 14145 55 mm Clamp-On Hobby Bench Vice 5 x Richard Burbidge Decorative Wood Stripwood - Pine - 900 x 8 x 8mm Balsa Wood - Giant Pack House of Card & Paper A4 220 gsm Card - Assorted Bright (Pack of 100 Sheets) 100 sheets coloured card mix A4 300gsm thick card Am-Tech A3 Cutting Mat Chartwell A3 Orange Student Graph Pad 50 Sheets (1, 5 & 10mm Grid Paper) J13B 4 PVA Glue Washable Adhesive School Home Crafts Non Toxic Wood Paper Fabric Art Bosch PKP 18 E Glue Gun Strong Heavy Duty Professional Bamboo Plant Support Garden Canes | 2ft - 10ft